CN110237440B - Medical linear accelerator treatment device - Google Patents
Medical linear accelerator treatment device Download PDFInfo
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- CN110237440B CN110237440B CN201910443340.4A CN201910443340A CN110237440B CN 110237440 B CN110237440 B CN 110237440B CN 201910443340 A CN201910443340 A CN 201910443340A CN 110237440 B CN110237440 B CN 110237440B
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- 230000007246 mechanism Effects 0.000 claims abstract description 135
- 230000005540 biological transmission Effects 0.000 claims abstract description 31
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 45
- 229910052721 tungsten Inorganic materials 0.000 claims description 45
- 239000010937 tungsten Substances 0.000 claims description 45
- 230000033001 locomotion Effects 0.000 claims description 39
- 239000003638 chemical reducing agent Substances 0.000 claims description 19
- 230000001360 synchronised effect Effects 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 4
- 230000001012 protector Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000005855 radiation Effects 0.000 description 15
- 238000001959 radiotherapy Methods 0.000 description 7
- 230000035939 shock Effects 0.000 description 7
- 230000001225 therapeutic effect Effects 0.000 description 7
- 239000006096 absorbing agent Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 231100000987 absorbed dose Toxicity 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1077—Beam delivery systems
- A61N5/1081—Rotating beam systems with a specific mechanical construction, e.g. gantries
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N2005/1092—Details
- A61N2005/1097—Means for immobilizing the patient
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Abstract
The invention provides a medical linear accelerator treatment device which comprises an accelerator rack, a treatment head and a double-end support treatment bed, wherein the accelerator rack comprises a fixed rack, a rotating rack, a gear rotating and positioning device and a wire harness drag chain mechanism, the rotating rack is rotatably connected with the fixed rack through the gear rotating and positioning device, the rotating rack is provided with a treatment head mounting frame, the wire harness is connected with the treatment head on the treatment head mounting frame through the wire harness drag chain mechanism, and the double-end support treatment bed comprises the treatment bed and an auxiliary support device. The treatment can be completed by mutual matching, the treatment head can improve the positioning precision of the treatment head, adjust the rigidity and the speed, and ensure the rapid and accurate treatment; the gear rotary positioning device is utilized to ensure the quick rotary positioning of the medical linear accelerator, effectively improve the positioning precision and the rotary rigidity, further ensure the quick rotary positioning of the medical linear accelerator, provide stable electric power and data instruction transmission for the accelerator, and effectively protect the wire harness.
Description
Technical Field
The invention relates to the technical field of medical accelerator manufacturing, in particular to a medical linear accelerator treatment device.
Background
In recent years, radiation therapy has been one of the important methods of tumor treatment, and medical linac has been the most used device for radiation therapy. The radiotherapy method comprises common radiotherapy, intensity modulated radiotherapy, image guided radiotherapy, stereotactic radiotherapy, etc. The medical linear accelerator treatment head has the functions of providing radiation beam current meeting certain uniformity and symmetry requirements, limiting the radiation beam current in a certain area and obtaining radiation fields with different sizes, shapes and angles required by clinic. In the treatment process of the existing accelerator treatment head, the positioning accuracy and rigidity of the treatment head rotating assembly are insufficient, and quick and accurate positioning adjustment and treatment cannot be realized.
Disclosure of Invention
The invention aims to provide a medical linear accelerator treatment device which can rapidly and accurately treat.
In order to solve the technical problems, the embodiment of the invention provides a medical linear accelerator treatment device, which comprises an accelerator rack, a treatment head and a double-end support treatment bed, wherein the accelerator rack comprises a fixed rack, a rotating rack, a gear rotating and positioning device and a wire harness drag chain mechanism, the rotating rack is rotationally connected with the fixed rack through the gear rotating and positioning device, a wire harness is connected with the rotating rack through the wire harness drag chain mechanism, the rotating rack is provided with a treatment head mounting frame, the wire harness is connected with the treatment head on the treatment head mounting frame through the wire harness drag chain mechanism, and the double-end support treatment bed comprises a treatment bed and an auxiliary support device;
the treatment head comprises a diaphragm, a treatment head rotating mechanism, an optical field assembly, an ionization chamber, an leveling block and a primary leveling cone, wherein the treatment head rotating mechanism is connected with the diaphragm and drives the diaphragm to rotate, the optical field assembly is arranged above the diaphragm, the ionization chamber is arranged above the optical field assembly, the leveling block is arranged above the ionization chamber, and the primary leveling cone is arranged above the leveling block;
The treatment head rotating mechanism comprises a rotating gear disc, a treatment head rotating motor and a transmission gear, wherein the treatment head rotating motor is connected with the transmission gear, the transmission gear is meshed with the rotating gear disc, and the treatment head rotating motor drives the rotating gear disc to rotate through the transmission gear.
Preferably, the treatment head rotating motor is connected with a transmission gear on the turntable bearing through a right-angle reducer and a worm, the worm is connected with the transmission gear, the transmission gear is a turbine, and the treatment head rotating mechanism is provided with an absolute encoder for performing closed-loop control on the position of the rotary gear disc.
Preferably, the diaphragm comprises an upper diaphragm and a lower diaphragm, and the upper diaphragm is arranged above the lower diaphragm; the upper diaphragm is arranged transversely in an opening and closing manner, and the lower diaphragm is arranged longitudinally in an opening and closing manner;
The upper diaphragm comprises a first tungsten block, a second tungsten block and a first arc-shaped sliding rail, the first tungsten block and the second tungsten block are transversely opened and closed along the first arc-shaped sliding rail, the lower diaphragm comprises a third tungsten block, a fourth tungsten block and a second arc-shaped sliding rail, the third tungsten block and the fourth tungsten block are longitudinally opened and closed along the second arc-shaped sliding rail, a motor absolute encoder and an absolute position magnetic grid are respectively arranged on the upper diaphragm and the lower diaphragm, and closed-loop control and mutual monitoring are carried out through the two-position detection of the absolute position magnetic grid arranged on the absolute encoder and the arc-shaped sliding rail;
The first tungsten block, the second tungsten block, the first arc-shaped sliding rail, the third tungsten block, the fourth tungsten block and the second arc-shaped sliding rail are concentrically arranged, and the section of the tungsten block is fan-shaped.
Preferably, the leveling block is arranged on a multi-station indexing table, the leveling block is adjusted along with the multi-station indexing table, the multi-station indexing table is a three-station indexing table, and comprises a ray leveling station, a placing station and a maintenance station, the multi-station indexing table is connected with a rotary gear disc, the multi-station indexing table comprises a servo motor, the servo motor is connected with the worm gear, an ionization chamber is provided with an ionization chamber slideway, and the ionization chamber is connected with the ionization chamber slideway in a sliding manner.
Preferably, the gear rotational positioning device includes: the rotary disc-shaped gear bearing is an annular disc-shaped gear bearing, the disc-shaped gear bearing is connected with a fixed frame, the rotary disc-shaped gear is sleeved on the disc-shaped gear bearing and is rotationally connected with the disc-shaped gear bearing, the driving motor is fixedly connected with the fixed frame, the output end of the driving motor is connected with the driving gear, the driving gear is meshed with the rotary disc-shaped gear and drives the rotary disc-shaped gear to rotate, a mounting hole is formed in the outer surface of the rotary disc-shaped gear, the rotary frame is connected with the rotary disc-shaped gear through the mounting hole, the driving motor is provided with a right-angle speed reducer and a torque protector, and the driving gear is provided with a tensioning sleeve.
Preferably, the gear rotary positioning device is provided with a rotary limiting mechanism, the rotary limiting mechanism is fixedly connected with the fixed frame, the gear rotary positioning device of the medical linear accelerator frame is provided with a gear position adjusting mechanism and a safety fixing mechanism, the gear position adjusting mechanism is fixedly connected with the fixed frame, and the safety fixing mechanism is fixedly connected with the fixed frame.
Preferably, the harness drag chain mechanism includes: the device comprises a drag chain fixed rail, a drag chain rotating rail and a drag chain, wherein the drag chain fixed rail is connected with a fixed frame, the drag chain rotating rail is connected with a rotating frame, and the drag chain is sleeved in the drag chain fixed rail and the drag chain rotating rail;
when the rotating frame rotates positively, the drag chain in the drag chain fixing track is lifted, and the lifted drag chain is retracted and sleeved in the drag chain rotating track; when the rotating frame rotates reversely, the drag chain in the drag chain rotating track falls down, and the falling drag chain is retracted and sleeved in the drag chain fixing track.
Preferably, the therapeutic bed comprises a movable bed body and a bed body support, the movable bed body is arranged above the bed body support, the bed body support is provided with a bed body lifting mechanism, the movable bed body is provided with a bed body transverse moving mechanism and a bed body longitudinal moving mechanism, the bed body support controls the movable bed body above the bed body support to lift through the bed body lifting mechanism, the movable bed body controls the movable bed body to transversely move and longitudinally move through the bed body transverse moving mechanism and the bed body longitudinal moving mechanism, and the bed body lifting mechanism, the bed body transverse moving mechanism and the bed body longitudinal moving mechanism are respectively provided with feedback sensors;
The auxiliary supporting device is arranged at one end of the treatment bed, is used for supporting the movable bed body which extends out of the treatment bed, and synchronously lifts and transversely moves along with the movable bed body;
The lathe bed lifting mechanism is provided with a first feedback sensor, the lathe bed transverse moving mechanism is provided with a second feedback sensor, the lathe bed longitudinal moving mechanism is provided with a third feedback sensor, the first feedback sensor and the second feedback sensor are absolute encoders, and the third feedback sensor is a stay wire type displacement sensor.
Preferably, the first feedback sensor performs closed-loop control on the lifting position, the second feedback sensor is used for performing closed-loop control on the transverse moving position, and the third feedback sensor is used for performing closed-loop control on the longitudinal moving position;
The lathe bed support comprises a lathe bed base and a lifting support, wherein the lathe bed base is provided with a lifting slide rail, the lifting support is in lifting sliding connection with the lathe bed base through the lifting slide rail, the lifting slide rail is a composite double-stroke guide rail, the lathe bed lifting mechanism comprises a first motor, a first gear and a first rack, the first motor is fixedly connected with the lifting support, the first rack is fixedly connected with the lathe bed base, the first motor is in gear tooth connection with the first rack through the first gear, and the first motor drives the lifting support to lift.
The movable lathe bed is arranged above the lifting support, the bottom of the movable lathe bed is connected with the lifting support through a lathe bed transverse moving mechanism, the lathe bed transverse moving mechanism comprises a second motor, a second gear and a second rack, the second motor is fixedly connected with the bottom of the movable lathe bed, the second rack is fixedly connected with the lifting support, the second motor is in gear tooth connection with the second rack through the second gear, and the second motor drives the movable lathe bed to transversely move.
The movable lathe bed is provided with a longitudinal movable guide rail and a lathe bed, the lathe bed is connected with the longitudinal movable guide rail in a sliding manner, the lathe bed is connected with the movable lathe bed through a lathe bed longitudinal moving mechanism, the lathe bed longitudinal moving mechanism comprises a third motor, a third gear and a synchronous belt, a sliding block is arranged at the bottom of the lathe bed and is connected with the synchronous belt, the third motor is connected with the synchronous belt through the third gear, and the third motor drives the movable lathe bed to longitudinally move.
Preferably, the auxiliary supporting device comprises device upright posts at two ends, a supporting plate, upright post brackets and a lifting transverse moving mechanism, wherein the lifting transverse moving mechanism is connected with the device upright posts and the supporting plate and used for controlling the supporting plate to lift and transversely move, the upright post brackets are arranged below the supporting plate, and the upright post brackets are connected with the device upright posts at two ends;
The device upright posts at the two ends are respectively provided with a screw rod and a rotating motor, and the rotating motor is connected with the screw rod and drives the screw rod to rotate;
the lifting transverse moving mechanism comprises a lifting sliding block and a connecting rod, wherein the lifting sliding block is respectively arranged on lead screws of the device stand columns at two ends and is in lifting sliding connection with the lead screws, and two ends of the connecting rod are respectively hinged with the lifting sliding block and the supporting plate; the device upright post is provided with an upright post guide rail, the lifting slide block slides up and down through the upright post guide rail, and the connecting rod is a parallel connecting rod.
The technical scheme of the invention has the following beneficial effects:
In the scheme, the accelerator frame, the treatment head and the double-end support treatment bed are arranged, so that treatment can be completed by mutual cooperation, the treatment head is provided with the diaphragm, the treatment head rotating mechanism, the light field component, the ionization chamber, the leveling block and the initial leveling cone, and the treatment head rotating motor drives the rotating gear disc to rotate through the transmission gear, so that the positioning precision of the treatment head can be improved, the rigidity and the speed can be adjusted, and rapid and accurate treatment can be ensured; through setting up fixed frame, runing rest, gear rotary positioning device and pencil tow chain mechanism, can utilize gear rotary positioning device to guarantee the quick rotary positioning of medical linac, the effectual positioning accuracy and the rotational rigidity that have improved, provide electric power and data instruction transmission for the accelerator when utilizing pencil tow chain mechanism can further guarantee the quick rotary positioning of medical linac to effectively protect the pencil.
Drawings
FIGS. 1-1 to 1-5 are schematic views showing a medical linac treatment apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a medical linac treatment head according to an embodiment of the present invention;
FIG. 3 is a schematic view of a medical linac housing according to an embodiment of the present invention;
FIG. 4 is a schematic view of a gear rotational positioning device according to an embodiment of the present invention;
FIG. 5 is a schematic view of a wire harness drag chain mechanism according to an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of a medical linac treatment head according to an embodiment of the present invention;
FIG. 7 is a schematic view of a medical linac treatment head according to an embodiment of the present invention;
FIG. 8 is a diagram of a therapeutic bed configuration in accordance with an embodiment of the present invention;
FIG. 9 is a diagram of a therapeutic bed configuration according to an embodiment of the present invention;
Fig. 10 is a structural diagram of an auxiliary supporting device according to an embodiment of the present invention.
[ Description of the Main element symbols ]
An accelerator frame 1; a treatment head 2; a double-ended support treatment couch 3;
A fixed frame 101; a rotating bracket 102; a gear rotational positioning device 103; a treatment head mount 104; a drive motor 105; a drive gear 106; a rotary disk gear 107; a disk-shaped gear bearing 108; a mounting hole 109; a rotation limiting mechanism 110; an adjustment mechanism 111; a safety securing mechanism 112; a drag chain fixed rail 113; drag chain rotation track 114; drag chain 115; a tow chain guard 116; a harness inlet 117; a harness outlet 118;
A treatment head rotation mechanism 202; an optical field assembly 203; an ionization chamber 204; a leveling block 205; a primary cone 206; rotating the gear plate 207; a treatment head rotating motor 208; a transmission gear 209; gear bearing 210; an upper diaphragm 211; a lower diaphragm 212; a first tungsten block 213; a second tungsten block 214; a first arcuate slide rail 215; a third tungsten block 216; a fourth tungsten block 217; a second arcuate slide rail 218; a multi-station index table 219; a mirror 220; a cold light source 221;
A treatment couch 301; an auxiliary support device 302; moving the bed 303; a bed support 304; a bed lifting mechanism 305; a bed base 306; a lifting bracket 307; a lifting slide rail 308; a first motor 309; a first gear 310; a first rack 311; a second motor 312; a second gear 313; a second rack 314; a moving rail 315; a third motor 316; a device column 317; a support plate 318; column support 319; a lifting and lowering lateral movement mechanism 320; a lead screw 321; a rotating motor 322; a lifting slider 323; a link 324; a column rail 325; a roller 326; a hinge 327;
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-1 to 3, a medical linac treatment apparatus according to an embodiment of the present invention includes an accelerator housing 1 including a fixed housing 101, a rotating bracket 102, a gear rotational positioning device 103, and a harness drag chain mechanism, a treatment head 2, and a double-ended support treatment couch 3, the rotating bracket 102 being rotatably connected to the fixed housing 101 through the gear rotational positioning device 103, and a harness being connected to the rotating bracket 102 through the harness drag chain mechanism;
The rotary bracket 102 is provided with a treatment head mounting frame 104, the wire harness is connected with the treatment head 2 on the treatment head mounting frame 104 through a wire harness drag chain mechanism, and the double-end support treatment bed 3 comprises a treatment bed 301 and an auxiliary support device 302;
The treatment head comprises a diaphragm 201, a treatment head rotating mechanism 202, an optical field assembly 203, an ionization chamber 204, an leveling block 205 and a primary leveling cone 206, wherein the treatment head rotating mechanism 202 is connected with the diaphragm 201 and drives the diaphragm 201 to rotate, the optical field assembly 203 is arranged above the diaphragm 201, the ionization chamber 204 is arranged above the optical field assembly 203, the leveling block 205 is arranged above the ionization chamber 204, and the primary leveling cone 206 is arranged above the leveling block 205; wherein, a multi-leaf intensity-modulated collimator can be arranged below the diaphragm 201;
The treatment head rotating mechanism 202 comprises a rotating gear plate 207, a treatment head rotating motor 208 and a transmission gear 209, the treatment head rotating motor 208 is connected with the transmission gear 209, the transmission gear 208 is meshed with the rotating gear plate 207, and the treatment head rotating motor 208 drives the rotating gear plate 207 to rotate through the transmission gear 208.
According to the medical linear accelerator, the accelerator frame, the treatment head and the double-end supporting treatment bed are arranged, so that treatment can be completed in a matched mode, the treatment head is provided with the diaphragm, the treatment head rotating mechanism, the light field component, the ionization chamber, the leveling block and the primary standard cone, the treatment head rotating motor drives the rotating gear disc to rotate through the transmission gear, the positioning precision of the treatment head can be improved, the rigidity and the speed can be adjusted, and rapid and accurate treatment can be guaranteed; through setting up fixed frame, runing rest, gear rotary positioning device and pencil tow chain mechanism, can utilize gear rotary positioning device to guarantee the quick rotary positioning of medical linac, the effectual positioning accuracy and the rotational rigidity that have improved, provide electric power and data instruction transmission for the accelerator when utilizing pencil tow chain mechanism can further guarantee the quick rotary positioning of medical linac to effectively protect the pencil.
Specifically, as shown in fig. 3 and 4, the gear rotational positioning device includes: the driving motor 105, the driving gear 106, the rotary disk gear 107 and the disk gear bearing 108, wherein the disk gear bearing 108 is an annular disk gear bearing, the disk gear bearing 108 is connected with the fixed frame 101, the rotary disk gear 107 is sleeved on the disk gear bearing 108 and is rotationally connected with the disk gear bearing 108, the driving motor 102 is fixedly connected with the fixed frame 101, the output end of the driving motor 102 is connected with the driving gear 106, the driving gear 106 is meshed with the rotating disc-shaped gear 107 and drives the rotating disc-shaped gear 107 to rotate, a mounting hole 109 is formed in the outer surface of the rotating disc-shaped gear 107, and the rotating bracket 102 is connected with the rotating disc-shaped gear 107 through the mounting hole 109.
In the embodiment, through setting up driving motor, drive gear, rotatory disk gear and disk gear bearing, can drive rotatory disk gear rotation and location through the meshing, can guarantee rotatory rigidity and the precision of location under the circumstances that rotatory disk gear installed the heavy weight treatment head, improve location rate and accuracy.
Preferably, the driving motor 105 is a servo motor, the driving motor 105 is provided with a right-angle reducer and a torque protector, and the driving gear 106 is provided with a tensioning sleeve.
In the embodiment, the servo motor is arranged and the right-angle speed reducer and the torque protector are arranged, so that the rotating speed can be ensured under the condition of ensuring the torque, and the reliability and the accuracy of the motor are improved; the driving gear is provided with the tensioning sleeve, so that the driving motor and the rotary disc-shaped gear can be further guaranteed to be meshed, and the rotation rigidity and the tight fit degree are improved.
Preferably, the gear rotation positioning device is provided with a rotation limiting mechanism 110, and the rotation limiting mechanism 110 is fixedly connected with the fixed frame 101.
The rotation limiting mechanism 110 comprises a circular arc guide rail, the axial lead of the circular arc guide rail coincides with the axial lead of the rotary disc-shaped gear, a sliding seat is arranged on the circular arc guide rail and moves along the circular arc guide rail, the sliding seat is connected with the outer end of a reset tension spring, the reset tension spring is fixed on a medical linear accelerator rack in an inward extending mode along the arc center direction, one end of the circular arc guide rail is provided with a positive limit travel switch, the other end of the circular arc guide rail is provided with a negative limit travel switch, the sliding seat is matched with a collision block, and the collision block is arranged on a rotary support of the medical linear accelerator. Preferably, shock absorbers are respectively arranged at two ends of the circular arc-shaped guide rail, the shock absorbers are fixedly connected with the medical linear accelerator rack, and shock absorbing rods of the shock absorbers are matched with the stop blocks.
In the embodiment, the rotary disc-shaped gear can be prevented from over-rotating through the rotary limiting mechanism, and the quick rotation of the rotary disc-shaped gear is ensured, so that the positioning speed is improved.
Preferably, the gear rotating and positioning device of the medical linear accelerator rack is provided with a gear position adjusting mechanism 111 and a safety fixing mechanism 112, the gear position adjusting mechanism 11 is fixedly connected with the fixed rack 101, and the safety fixing mechanism 112 is fixedly connected with the fixed rack 1.
Preferably, as shown in fig. 5, the wire harness drag chain mechanism includes: the drag chain comprises a drag chain fixed track 113, a drag chain rotary track 114 and a drag chain 115, wherein the drag chain fixed track 113 is connected with the fixed frame 101, the drag chain rotary track 114 is connected with the rotary support 102, and the drag chain 115 is sleeved in the drag chain fixed track 113 and the drag chain rotary track 114. Preferably, the drag chain 115 is a hollow drag chain, and the wire harness penetrates the hollow drag chain. Preferably, a drag chain guard 116 is disposed above the track slot of the drag chain rotation track 114.
The tow chain rotation track 114 is an endless tow chain track. The drag chain guard 116 is a circular arc guard and is connected to the fixed frame 101. The drag chain fixing rail 113 is a circular arc drag chain rail. The drag chain 115 is a hollow drag chain, and the wire harness penetrates into the hollow drag chain.
Preferably, one end of the drag chain fixing track 1 is provided with a wire harness inlet 117, the drag chain rotating track 114 is provided with a wire harness outlet 118, and the wire harness outlet 118 corresponds to the position of the treatment head 2 of the medical linear accelerator treatment device. Both ends of the drag chain 115 are fixedly connected with a wire harness inlet 117 and a wire harness outlet 118, respectively.
According to the wire harness drag chain of the medical linear accelerator treatment device, through the arrangement of the drag chain fixing rail, the drag chain rotating rail and the drag chain, under the condition of connecting the wire harnesses, the rotating support and the treatment head on the rotating support can be guaranteed to rapidly rotate and position for treatment within a range of +/-360 degrees, the wire harnesses are protected, the control transmission of electric power, water, gas and data is guaranteed, the reliability of equipment is improved, the structure is simple, the price is low, and the reliability and the service life are high.
When the rotary support rotates positively, the drag chain in the drag chain fixing track is lifted, and the lifted drag chain is retracted and sleeved in the drag chain rotary track; when the rotary support rotates reversely, the drag chain in the drag chain rotary track falls, and the falling drag chain is retracted and sleeved in the drag chain fixed track. The invention can ensure the wiring harness follow-up in the rotating positioning treatment process of the treatment device and reduce the abrasion and influence of the wiring harness.
Preferably, the medical linear accelerator treatment device is provided with a rotation limiting mechanism, and the wire harness drag chain is matched with the rotation limiting mechanism. The rotary limiting mechanism is fixedly connected with the fixed frame and comprises a circular arc-shaped guide rail, the axial lead of the circular arc-shaped guide rail coincides with the axial lead of the rotary support, a sliding seat is arranged on the circular arc-shaped guide rail, the sliding seat moves along the circular arc-shaped guide rail, the sliding seat is connected with the outer end of a reset tension spring, the reset tension spring is fixed on the fixed frame in an inward extending mode along the central direction of the arc, one end of the circular arc-shaped guide rail is provided with a positive limit travel switch, the other end of the circular arc-shaped guide rail is provided with a negative limit travel switch, the sliding seat is matched with a collision block, and the collision block is arranged on the rotary support.
The shock absorber is fixedly connected with the medical linear accelerator rack, and a shock absorbing rod of the shock absorber is matched with the stop block.
In this embodiment, can treat the head and avoid excessive rotation at the within range of + -360 through rotatory stop gear, effectively protect pencil and tow chain, play safe spacing effect, and then guarantee quick rotation, improve positioning speed.
Specifically, the treatment head rotating motor 208 is connected with the transmission gear 209 through a right-angle reducer and a worm, the worm is connected with the transmission gear, the transmission gear 209 is a turbine, and the treatment head rotating mechanism 202 is provided with an absolute encoder to perform closed-loop control on the position of the rotating gear disc.
The treatment head rotating mechanism 202 can be supported by a four-point contact belt gear bearing 210, the treatment head rotating motor is a servo motor, and the servo motor drives the rotating gear disc 207 through a right-angle speed reducer and a worm gear, so that the treatment head forms a radiation field with any angle at an isocenter plane, and meanwhile, an absolute encoder is arranged for closed-loop control, so that the angular positioning precision of the treatment head at the isocenter plane is as high as 0.1 degree. The primary cone 206 may be fixed to the stator of the treatment head rotation mechanism 202 for blocking primary radiation generated by radiation sources outside the maximum radiation field.
According to the medical linear accelerator treatment head provided by the embodiment of the invention, the diaphragm, the treatment head rotating mechanism, the light field component, the ionization chamber, the leveling block and the primary standard cone are arranged, and the treatment head rotating motor drives the rotating gear disc to rotate through the transmission gear, so that the positioning precision of the treatment head can be improved, the rigidity and the speed can be adjusted, and the rapid and accurate treatment can be ensured.
Specifically, as shown in fig. 6 and 7, the diaphragm 201 includes an upper diaphragm 211 and a lower diaphragm 212, and the upper diaphragm 211 is disposed above the lower diaphragm 212; the upper diaphragm 211 is opened and closed horizontally, and the lower diaphragm 212 is opened and closed vertically. The upper diaphragm 211 comprises a first tungsten block 213, a second tungsten block 214 and a first arc-shaped sliding rail 215, the first tungsten block 213 and the second tungsten block 214 are transversely opened and closed along the first arc-shaped sliding rail 215, the lower diaphragm 212 comprises a third tungsten block 216, a fourth tungsten block 217 and a second arc-shaped sliding rail 218, the third tungsten block 216 and the fourth tungsten block 217 are longitudinally opened and closed along the second arc-shaped sliding rail 218, and the upper diaphragm 211 and the lower diaphragm 212 are subjected to closed-loop control through an absolute encoder. Preferably, the first tungsten block 213, the second tungsten block 214, the first arc-shaped sliding rail 215, the third tungsten block 216, the fourth tungsten block 217 and the second arc-shaped sliding rail 218 are concentrically arranged.
The cross sections of the four tungsten blocks are fan-shaped, and can rotate by taking the independent diffraction source as the center, and the cross sections are consistent with the movement mode, so that the structure is compact. Any rectangular radiation field with the diameter not larger than 400mm can be formed at the isocenter through opening and closing of the upper diaphragm and the lower diaphragm, meanwhile, the upper diaphragm and the lower diaphragm are both designed with a motor absolute encoder and 2 position detection of an absolute position magnetic grid on an arc-shaped sliding rail, the latter is used for closed loop control, the former is used for detection, so that the motion positioning precision of the upper diaphragm and the lower diaphragm at the isocenter is better than 0.1mm, meanwhile, errors of a certain position sensor can be avoided, and the reliability is greatly improved.
Specifically, the leveling block 205 is disposed on the multi-station indexing table 219, and is adjusted along with the multi-station indexing table. The multi-station indexing table 219 is a three-station indexing table, and comprises a ray leveling station, a placing station and a maintenance station. Preferably, the multi-station indexing table 219 is connected to the rotary gear plate 207, and the multi-station indexing table 219 includes a servo motor and is driven by a worm gear.
The leveling block is arranged below the primary leveling cone, and leveling of X-radiation intensity distribution is achieved by means of different absorption amounts of different material thicknesses on radiation, so that dose distribution meeting clinical treatment requirements is obtained. The leveling block can be driven by the servo motor through the worm and gear and can rotate to different angles, so that the switching of the ray leveling station, the common station and the maintenance station is realized, the flexibility is higher, and the functions are more comprehensive.
Preferably, the ionization chamber 204 is provided with an ionization chamber slide through which the ionization chamber is slidably connected. The light field assembly 203 comprises a reflector 220 and a cold light source 221, wherein the reflector 220 and the cold light source 221 are arranged in parallel.
An ionization chamber is provided below the leveling block for measuring the amount of radiation associated with the absorbed dose. The ionization chamber can be provided with a linear guide rail, and the ionization chamber can be manually slid out for convenient maintenance and resetting.
The light field component is used for visualizing the radiation field before treatment, is arranged below the ionization chamber and is positioned at an arc-shaped space formed by the upper diaphragm, so that the structure is compact. The light field component can be made of various materials so as to have uniform radiation absorptivity, and meanwhile, the cold light source can be manually adjustable in three directions so as to be symmetrical to the cold light source relative to the reflector.
The drag chain component is used for protecting and traction the cable and is arranged in the inner cavity of the treatment head rotating mechanism, so that the structure is compact and concise. The inner wall of the drag chain component is provided with a drag chain baffle plate, so that the drag chain swings in a preset space when the treatment head is in each state.
The medical linear accelerator treatment head provided by the embodiment of the invention has the following advantages:
The treatment head rotating mechanism is supported by the four-point contact belt gear bearing and has good angular rigidity; the servo motor is driven by the first-stage right-angle speed reducer and the first-stage worm gear, so that the transmission clearance is small; an absolute encoder is designed to perform closed-loop control, so that the control precision is ensured; the three points ensure the positioning precision and the running stability of the rotating component at the same time. The treatment head rotating mechanism is designed with a larger window and is matched with rotation, and can be used for leveling block repair, ionization chamber disassembly, reflector wiping and cold light lamp adjustment.
2. The leveling block part is driven by the servo motor to rotate to different angles through a worm gear and a worm, so that the switching of a ray leveling station, a common station and a maintenance station is realized, and the device has multiple functions and good maintainability. And the repeated positioning precision of the ray leveling station is ensured by the Hall sensor.
3. The light field component is made of various materials, so that the light field component has uniform radiation absorptivity, and the uniformity of rays in a radiation field is ensured. The reflector is fixed in the arc-shaped space of the upper diaphragm part, so that the structure is compact.
4.4 Tungsten blocks of the diaphragm can rotate by taking an independent diffraction source as a center, and any rectangular radiation field with the diameter not more than 400mm can be formed at the isocenter plane; the meshed pinion is driven by the servo motor through the planetary gear and the right-angle speed reducer, has a large reduction ratio, and ensures enough output torque; meanwhile, an absolute encoder is designed to perform closed-loop control, so that the motion positioning precision of the absolute encoder at the isocenter plane is as high as 0.1mm. The tungsten door is arc-shaped, and is consistent with the movement mode, so that the structure is compact.
5. The drag chain is designed in the inner cavity of the treatment head rotating mechanism, so that the structure is compact and concise.
Specifically, as shown in fig. 8, 9 and 10, the therapeutic bed 301 includes a moving bed 303 and a bed support 304, the moving bed 303 is disposed above the bed support 304, the bed support 304 is provided with a bed lifting mechanism 305, the moving bed 303 is provided with a bed lateral movement mechanism and a bed longitudinal movement mechanism, the bed support 304 controls the moving bed 303 above the bed support 304 to lift by the bed lifting mechanism 305, the moving bed 303 controls the moving bed 303 to move laterally and longitudinally by the bed lateral movement mechanism and the bed longitudinal movement mechanism, and the bed lifting mechanism 305, the bed lateral movement mechanism and the bed longitudinal movement mechanism are respectively provided with feedback sensors;
The auxiliary supporting device 302 is disposed at one end of the therapeutic bed 301, and is used for supporting the moving bed 303 extending out of the therapeutic bed 301, and moving up and down and transversely along with the moving bed 303.
The bed lifting mechanism 305 is provided with a first feedback sensor, the bed transverse moving mechanism is provided with a second feedback sensor, the bed longitudinal moving mechanism is provided with a third feedback sensor, the first feedback sensor and the second feedback sensor are absolute encoders, and the third feedback sensor is a stay wire type displacement sensor.
Preferably, the first feedback sensor performs closed-loop control on the lifting position, the second feedback sensor is used for performing closed-loop control on the transverse moving position, and the third feedback sensor is used for performing closed-loop control on the longitudinal moving position. The linear motion in three directions can be provided with an absolute position linear magnetic grid beside the guide rail, and the absolute position linear magnetic grid and an absolute encoder or a stay wire type displacement sensor on the driving motor form absolute position double detection, so that the position precision is ensured, the mutual detection redundancy backup is realized, and the position information is not lost when the device is recovered after shutdown.
According to the double-end support treatment couch, double-end support of the treatment couch can be realized through the treatment couch and the auxiliary support device, deformation of the treatment couch is reduced, treatment positioning is more accurate, movement of the couch body is more stable and rapid, movement direction is more flexible, and adaptability is stronger.
Specifically, the bed support 304 includes a bed base 306 and a lifting support 307, the bed base 306 is provided with a lifting slide rail 308, the lifting support 307 is in lifting sliding connection with the bed base 306 through the lifting slide rail 308, the lifting slide rail is a composite double-stroke guide rail, the bed lifting mechanism 305 includes a first motor 309, a first gear 310 and a first rack 311, the first motor 309 is fixedly connected with the lifting support 307, the first rack 311 is fixedly connected with the bed base 306, the first motor 309 is in gear tooth connection with the first rack 311 through the first gear 310, and the first motor 309 drives the lifting support 307 to move in a lifting manner.
The lifting component comprises a base, a lifting bracket, a supporting device, a transmission device and a feedback sensor. The lifting slide rail is a double-section telescopic guide rail, so that the supporting rigidity is ensured, wherein one surface of the guide rail is fixed on the bed base and the other surface of the guide rail is fixed on the lifting bracket; the lathe bed lifting mechanism can comprise a gear, a rack, a right-angle planetary reducer and a servo motor, wherein the rack is fixed on the lifting support, the servo motor is connected with the right-angle planetary reducer and fixed on the lathe bed base, and the gear is fixed on the output shaft of the reducer and meshed with the rack. The feedback sensor adopts an absolute encoder to perform position closed-loop control, so that the positioning accuracy is ensured.
In the embodiment of the invention, the rigid movement of the treatment bed can be ensured through the bed lifting mechanism, the movement speed is higher, the feedback sensor adopts the absolute encoder, and the closed-loop control can be carried out on the lifting movement of the bed body, so that the positioning of the bed body is further ensured, the composite double-stroke guide rail is adopted, the rigidity is good, the long stroke is realized, the space is saved, the position of the bed surface is low at the lowest position, and the patient can get on or off the bed conveniently.
Specifically, the movable bed 303 is disposed above the lifting support 307, the bottom of the movable bed 303 is connected with the lifting support 307 through a bed transverse moving mechanism, the bed transverse moving mechanism includes a second motor 312, a second gear 313 and a second rack 314, the second motor 312 is fixedly connected with the bottom of the movable bed 303, the second rack 314 is fixedly connected with the lifting support 307, the second motor 312 is in gear tooth connection with the second rack 314 through the second gear 313, and the second motor 312 drives the movable bed 303 to move transversely.
The bottom of the movable lathe bed can be provided with a bracket, a transverse moving frame, a supporting device, a lathe bed transverse moving mechanism and a feedback sensor. The support device is characterized in that two ends of the support device are respectively provided with a cross roller linear guide rail to ensure the support rigidity, wherein one surface of the guide rail is fixed on the bracket, and the other surface of the guide rail is fixed on the transverse moving frame; the lathe bed transverse moving mechanism can comprise a gear rack, a right-angle planetary reducer and a servo motor, wherein the gear rack is fixed on the transverse moving frame, the servo motor is connected with the right-angle planetary reducer and fixed on the bracket, and the pinion is fixed on the output shaft of the reducer and meshed with the gear rack. The feedback sensor adopts an absolute encoder to perform position closed-loop control, so that the positioning accuracy is ensured.
In the embodiment, the bed body transverse moving mechanism can ensure the rigid movement of the treatment bed, the moving speed is higher, and the feedback sensor adopts an absolute encoder and can perform closed-loop control on the bed body transverse movement, so that the positioning of the bed body is further ensured.
Specifically, the moving bed 303 is provided with a longitudinal moving guide rail 315 and a bed plate, the bed plate is slidably connected with the longitudinal moving guide rail 315, the bed plate is connected with the moving bed 303 through a bed longitudinal moving mechanism, the bed longitudinal moving mechanism comprises a third motor 316, a third gear and a synchronous belt, a sliding block is arranged at the bottom of the bed plate, the sliding block is connected with the synchronous belt, the third motor 316 is connected with the synchronous belt through the third gear, and the third motor drives the moving bed to longitudinally move.
The top of the movable lathe bed can comprise a bed plate, a supporting device, a lathe bed longitudinal moving mechanism and a feedback sensor. The supporting device comprises two ball linear guide rails and a guide follow-up cam, so that the supporting rigidity is ensured, wherein the guide rails are fixed with the transverse moving frame, and the sliding blocks are fixed with the bed board; the lathe bed longitudinal movement mechanism can comprise a synchronous belt module, a clutch, a right-angle planetary reducer and a servo motor, wherein the synchronous belt module is fixed with the transverse moving frame, the output end of the clutch is connected with a synchronous belt driving wheel, and the input of the clutch is connected with the planetary reducer and the servo motor. The feedback sensor adopts a stay wire type displacement sensor to perform position closed-loop control, so that the positioning accuracy is ensured.
In the embodiment, the rigid movement of the therapeutic bed can be ensured through the bed body longitudinal movement mechanism, the movement speed is higher, and the feedback sensor adopts a stay wire type displacement sensor and can perform closed-loop control on the bed body longitudinal movement, so that the positioning of the bed body is further ensured.
Specifically, the auxiliary supporting device 302 includes a device column 317 at two ends, a supporting plate 318, a column bracket 319, and a lifting and transverse moving mechanism 320, where the lifting and transverse moving mechanism 320 connects the device column 317 and the supporting plate 318, and is used for controlling the supporting plate 318 to lift and transversely move, the column bracket 319 is disposed below the supporting plate 318, and the column bracket 319 is connected with the device column 317 at two ends.
The device upright posts 317 at the two ends are respectively provided with a screw rod 321 and a rotating motor 322, and the rotating motor 322 is connected with the screw rod 321 and drives the screw rod 321 to rotate; the lifting transverse moving mechanism 320 comprises a lifting slide block 323 and a connecting rod 324, wherein the lifting slide block 323 is respectively arranged on a lead screw 321 of the device upright post 317 at two ends and is in lifting sliding connection with the lead screw 321, and two ends of the connecting rod 324 are respectively hinged with the lifting slide block 323 and the supporting plate 318.
The device upright 317 is provided with an upright guide 325, the lifting slider 323 slides up and down through the upright guide 325, and the link 324 is a parallel link. The surface of the supporting plate 318 is provided with a roller 326, and the roller 326 is used for supporting the moving bed 303 on the supporting plate to move. The parallel links are connected by a hinge 327.
The auxiliary support can comprise a support plate, two groups of auxiliary lifting transverse moving mechanisms and parallel connecting rods. Wherein, the auxiliary bed board is provided with a plurality of rollers for sliding support and movement of the bed body. The device upright post comprises an upright frame and is fixed on the ground; a ball linear guide rail; the servo motor is connected with the right-angle planetary reducer and the screw rod to drive the screw rod nut and the lifting slide block to do linear motion. And one end of the parallel connecting rod is connected with the lifting slide block, and the other end of the parallel connecting rod is connected with the supporting plate so as to support and drive the supporting plate to do lifting and transverse movement.
According to the embodiment of the invention, the device upright post, the support plate, the upright post support and the lifting transverse moving mechanism are arranged, so that the movable lathe bed is supported, and simultaneously, the lifting transverse moving mechanism and the movable lathe bed can synchronously move, and the simultaneous linkage support is realized.
The embodiment of the invention 1. The structure is ingenious, the rigidity is good, the deformation is small, thus a structural form is provided for the increase of the longitudinal travel; meanwhile, due to good rigidity, the thickness of the bed board can be reduced, so that good ray transmittance is ensured.
2. The main body of the treatment bed adopts a serial structure, which is easy to realize a larger stroke. The auxiliary support adopts a parallel structure, so that the structure is compact and the bearing capacity is high; and the structure is symmetrical, is simple and beautiful, and is invisible in the treatment space of the medical accelerator when the auxiliary bed board descends.
3. The invention adopts the encoder to carry out closed-loop control, so that the operation is stable, the positioning precision is high, and the accurate treatment positioning is realized.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (6)
1. The medical linear accelerator treatment device is characterized by comprising an accelerator rack, a treatment head and a double-end support treatment bed, wherein the accelerator rack comprises a fixed rack, a rotating rack, a gear rotating and positioning device and a wire harness drag chain mechanism, the rotating rack is rotationally connected with the fixed rack through the gear rotating and positioning device, a wire harness is connected with the rotating rack through the wire harness drag chain mechanism, the rotating rack is provided with a treatment head mounting frame, the wire harness is connected with the treatment head on the treatment head mounting frame through the wire harness drag chain mechanism, and the double-end support treatment bed comprises the treatment bed and an auxiliary support device;
the treatment head comprises a diaphragm, a treatment head rotating mechanism, an optical field assembly, an ionization chamber, an leveling block and a primary leveling cone, wherein the treatment head rotating mechanism is connected with the diaphragm and drives the diaphragm to rotate, the optical field assembly is arranged above the diaphragm, the ionization chamber is arranged above the optical field assembly, the leveling block is arranged above the ionization chamber, and the primary leveling cone is arranged above the leveling block;
The treatment head rotating mechanism comprises a rotating gear disc, a treatment head rotating motor and a transmission gear, the treatment head rotating motor is connected with the transmission gear, the transmission gear is meshed with the rotating gear disc, and the treatment head rotating motor drives the rotating gear disc to rotate through the transmission gear;
The treatment head rotating motor is connected with a transmission gear on the turntable bearing through a right-angle speed reducer and a worm, the worm is connected with the transmission gear, the transmission gear is a turbine, and the treatment head rotating mechanism is provided with an absolute encoder for performing closed-loop control on the position of a rotary gear disc;
The diaphragm comprises an upper diaphragm and a lower diaphragm, and the upper diaphragm is arranged above the lower diaphragm; the upper diaphragm is arranged transversely in an opening and closing manner, and the lower diaphragm is arranged longitudinally in an opening and closing manner;
The upper diaphragm comprises a first tungsten block, a second tungsten block and a first arc-shaped sliding rail, the first tungsten block and the second tungsten block are transversely opened and closed along the first arc-shaped sliding rail, the lower diaphragm comprises a third tungsten block, a fourth tungsten block and a second arc-shaped sliding rail, the third tungsten block and the fourth tungsten block are longitudinally opened and closed along the second arc-shaped sliding rail, a motor absolute encoder and an absolute position magnetic grid are respectively arranged on the upper diaphragm and the lower diaphragm, and closed-loop control and mutual monitoring are carried out through the two-position detection of the absolute position magnetic grid arranged on the absolute encoder and the arc-shaped sliding rail;
The first tungsten block, the second tungsten block, the first arc-shaped sliding rail, the third tungsten block, the fourth tungsten block and the second arc-shaped sliding rail are concentrically arranged, and the section of the tungsten block is fan-shaped;
The device comprises a driving motor, a driving gear, a rotary disc gear and a disc gear bearing, wherein the disc gear bearing is an annular disc gear bearing, the disc gear bearing is connected with a fixed frame, the rotary disc gear is sleeved on the disc gear bearing and is rotationally connected with the disc gear bearing, the driving motor is fixedly connected with the fixed frame, the output end of the driving motor is connected with the driving gear, the driving gear is meshed with the rotary disc gear and drives the rotary disc gear to rotate, the outer surface of the rotary disc gear is provided with a mounting hole, the rotary frame is connected with the rotary disc gear through the mounting hole, the driving motor is provided with a right-angle speed reducer and a torque protector, and the driving gear is provided with a tensioning sleeve;
The harness drag chain mechanism includes: the device comprises a drag chain fixed rail, a drag chain rotating rail and a drag chain, wherein the drag chain fixed rail is connected with a fixed frame, the drag chain rotating rail is connected with a rotating frame, and the drag chain is sleeved in the drag chain fixed rail and the drag chain rotating rail;
when the rotating frame rotates positively, the drag chain in the drag chain fixing track is lifted, and the lifted drag chain is retracted and sleeved in the drag chain rotating track; when the rotating frame rotates reversely, the drag chain in the drag chain rotating track falls down, and the falling drag chain is retracted and sleeved in the drag chain fixing track.
2. The medical linear accelerator treatment device according to claim 1, wherein the leveling block is arranged on a multi-station indexing table, the leveling block is adjusted along with the multi-station indexing table, the multi-station indexing table comprises a ray leveling station, a placing station and a maintenance station, the multi-station indexing table is connected with a rotary gear disc, the multi-station indexing table comprises a servo motor and an ionization chamber slide way, and the ionization chamber is provided with an ionization chamber slide way and is connected with the ionization chamber slide way in a sliding manner.
3. The medical linac treatment device according to claim 1, characterized in that the gear rotational positioning device is provided with a rotational limiting mechanism fixedly connected with the stationary gantry, the medical linac gantry gear rotational positioning device is provided with a gear position adjustment mechanism fixedly connected with the stationary gantry and a safety fixing mechanism fixedly connected with the stationary gantry.
4. The medical linac treatment device according to claim 1, characterized in that the treatment couch comprises a moving couch and a couch support, the moving couch is arranged above the couch support, the couch support is provided with a couch lifting mechanism, the moving couch is provided with a couch lateral movement mechanism and a couch longitudinal movement mechanism, the couch support controls the moving couch lifting above the couch support by the couch lifting mechanism, the moving couch controls the moving couch lateral movement and the couch longitudinal movement by the couch lateral movement mechanism and the couch longitudinal movement mechanism, the couch lifting mechanism, the couch lateral movement mechanism and the couch longitudinal movement mechanism are respectively provided with feedback sensors;
the auxiliary supporting device is arranged at one end of the treatment bed, is used for supporting the movable bed body which extends out of the treatment bed, and synchronously lifts and transversely moves along with the movable bed body:
The lathe bed lifting mechanism is provided with a first feedback sensor, the lathe bed transverse moving mechanism is provided with a second feedback sensor, the lathe bed longitudinal moving mechanism is provided with a third feedback sensor, the first feedback sensor and the second feedback sensor are absolute encoders, and the third feedback sensor is a stay wire type displacement sensor.
5. The medical linac treatment device according to claim 4, wherein said first feedback sensor performs closed-loop control of lifting position, second feedback sensor performs closed-loop control of lateral movement position, and third feedback sensor performs closed-loop control of longitudinal movement position;
The machine tool support comprises a machine tool base and a lifting support, wherein the machine tool base is provided with a lifting slide rail, the lifting support is in lifting sliding connection with the machine tool base through the lifting slide rail, the lifting slide rail is a composite double-stroke guide rail, the machine tool lifting mechanism comprises a first motor, a first gear and a first rack, the first motor is fixedly connected with the lifting support, the first rack is fixedly connected with the machine tool base, the first motor is in gear tooth connection with the first rack through the first gear, and the first motor drives the lifting support to lift;
the movable lathe bed is arranged above the lifting support, the bottom of the movable lathe bed is connected with the lifting support through a lathe bed transverse moving mechanism, the lathe bed transverse moving mechanism comprises a second motor, a second gear and a second rack, the second motor is fixedly connected with the bottom of the movable lathe bed, the second rack is fixedly connected with the lifting support, the second motor is in gear tooth connection with the second rack through the second gear, and the second motor drives the movable lathe bed to transversely move;
The movable lathe bed is provided with a longitudinal movable guide rail and a lathe bed, the lathe bed is connected with the longitudinal movable guide rail in a sliding manner, the lathe bed is connected with the movable lathe bed through a lathe bed longitudinal moving mechanism, the lathe bed longitudinal moving mechanism comprises a third motor, a third gear and a synchronous belt, a sliding block is arranged at the bottom of the lathe bed and is connected with the synchronous belt, the third motor is connected with the synchronous belt through the third gear, and the third motor drives the movable lathe bed to longitudinally move.
6. The medical linac treatment device according to claim 4, wherein said auxiliary supporting means comprises device uprights at both ends, a supporting plate, upright supports connecting the device uprights and the supporting plate for controlling the lifting and the lateral movement of the supporting plate, and lifting lateral movement means connecting the device uprights at both ends, said upright supports being arranged under the supporting plate;
The device upright posts at the two ends are respectively provided with a screw rod and a rotating motor, and the rotating motor is connected with the screw rod and drives the screw rod to rotate;
the lifting transverse moving mechanism comprises a lifting sliding block and a connecting rod, wherein the lifting sliding block is respectively arranged on lead screws of the device stand columns at two ends and is in lifting sliding connection with the lead screws, and two ends of the connecting rod are respectively hinged with the lifting sliding block and the supporting plate; the device upright post is provided with an upright post guide rail, the lifting slide block slides up and down through the upright post guide rail, and the connecting rod is a parallel connecting rod.
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| CN110960807B (en) * | 2019-12-05 | 2022-03-04 | 上海联影医疗科技股份有限公司 | A medical linear accelerator system |
| CN114053597B (en) * | 2020-08-04 | 2022-08-09 | 中国原子能科学研究院 | Method for replacing treatment head by rotating frame |
| CN114053596B (en) * | 2020-08-04 | 2022-08-09 | 中国原子能科学研究院 | Rotary rack with replaceable treatment head |
| CN111887880A (en) * | 2020-09-10 | 2020-11-06 | 佛山原子医疗设备有限公司 | A complete ring device |
| CN112612227A (en) * | 2020-12-09 | 2021-04-06 | 合肥中科离子医学技术装备有限公司 | Control method of particle rotating treatment room rotating rack |
| CN112657071A (en) * | 2020-12-31 | 2021-04-16 | 陈涛 | Automatic adjusting and supporting device for tumor radiotherapy equipment and radiotherapy equipment |
| CN114132240B (en) * | 2021-12-28 | 2025-01-21 | 江苏全盛座舱技术股份有限公司 | A mobile platform for vehicle refrigerator |
| CN117531129B (en) * | 2023-10-23 | 2024-08-23 | 智维精准(北京)医疗科技有限公司 | Linear accelerator frame |
| CN118718275B (en) * | 2024-08-08 | 2025-04-15 | 广州医科大学附属肿瘤医院(广州市癌症防治中心) | A body-adaptive positioning radiotherapy device |
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| CN106964080A (en) * | 2017-04-11 | 2017-07-21 | 沈阳东软医疗系统有限公司 | Therapeutic bed and clinac |
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| CN104307113B (en) * | 2014-10-20 | 2017-01-25 | 苏州大学张家港工业技术研究院 | Radiation therapy system |
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| CN106134311B (en) * | 2010-11-18 | 2013-10-30 | 江苏海明医疗器械有限公司 | Two-photon treatment head |
| CN106964080A (en) * | 2017-04-11 | 2017-07-21 | 沈阳东软医疗系统有限公司 | Therapeutic bed and clinac |
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