A body-adaptive positioning radiotherapy device

Abstract

A body adaptive positioning radiotherapy device comprises: a radiotherapy instrument, a treatment bed and a positioning device; the positioning device is arranged on the upper side of the treatment bed, and comprises a lateral adjustment structure, a longitudinal adjustment structure, a positioning clamping structure and a wire mesh fixing structure; the lateral adjustment structure and the longitudinal adjustment structure are used to adjust the position of the positioning clamping structure; the positioning clamping structure is used to fix a specified position of a human body; the wire mesh fixing structure is arranged on the upper side of the positioning clamping structure, after the positioning clamping structure reaches the specified position, the wire mesh fixing structure covers the specified position of the human body and applies a downward restraining force, and stops further applying force when the pulling force reaches a preset value, thereby realizing adaptive fixation of the specified part.

Description

Technical Field

[0001] The invention relates to the field of body adaptive positioning, and in particular to a body adaptive positioning radiotherapy device. Background Art

[0002] Before radiotherapy is given to a patient, the patient usually needs to be fixed. In the prior art, the fixing method is mostly clamped by a clamp. The position of the clamp cannot be adjusted and is manually operated, resulting in uneven clamping force and discomfort to the patient. Since the position of the clamp cannot be adjusted adaptively and cannot be clamped adaptively according to different positions, the treatment part may move during the treatment, affecting the effect of radiotherapy. Therefore, how to provide a body adaptive positioning device for radiotherapy is an urgent problem to be solved. Summary of the invention

[0003] In view of the above technical problems, the present invention provides a body adaptive positioning radiotherapy device, comprising: a radiotherapy instrument, a treatment bed and a positioning device; the radiotherapy instrument comprises a rotating bracket and a radiation source, the radiation source is arranged inside the rotating bracket, and the rotating bracket can drive the radiation source to perform circular motion;

[0004] The treatment bed includes an adjustment platform and a fixed bed, wherein the fixed bed is arranged on the upper side of the adjustment platform, and the adjustment platform can drive the fixed bed to perform lifting movement or horizontal movement;

[0005] The positioning device is arranged on the upper side of the treatment bed, and includes a lateral adjustment structure, a longitudinal adjustment structure, a positioning clamping structure and a wire mesh fixing structure; the lateral adjustment structure and the longitudinal adjustment structure are used to adjust the position of the positioning clamping structure; the positioning clamping structure is used to fix the designated position of the human body; the wire mesh fixing structure is arranged on the upper side of the positioning clamping structure, and after the positioning clamping structure reaches the designated position, the wire mesh fixing structure covers the designated position of the human body and applies a downward restraining force.

[0006] Optionally, the lateral adjustment structure includes a first guide rail, a first slider, a double-threaded lead screw and a first driving module arranged laterally; the first slider is arranged on the first guide rail, a first sliding groove matching the first guide rail is arranged on the first slider, a lead screw groove matching the double-threaded lead screw is arranged on the outer side of the first sliding groove, and the double-threaded lead screw passes through the lead screw groove to drive the first slider to move; threads with different directions are arranged on both sides of the double-threaded lead screw, and a first driving tooth is arranged in the middle; the first driving module is connected to the first driving tooth, and is used to drive the double-threaded lead screw to rotate;

[0007] The longitudinal adjustment structure includes a longitudinally arranged second guide rail, a sliding box, a second drive module, a cross limit hole and track teeth; the second guide rail is arranged on the upper side of the first sliding block; the cross limit holes are opened on both sides of the sliding box, and the second guide rail passes through the cross limit holes; the track teeth are arranged on the upper side of the second guide rail; the second drive module is fixed on the sliding box and connected to the track teeth, and is used to drive the sliding box to move along the second guide rail.

[0008] Optionally, the positioning and clamping structure comprises a positioning member, a driving member, a tensioning member and a pressure spring; the pressure spring is arranged between the positioning member and the driving member;

[0009] The positioning member includes a curved box, a pull wire, a first fixed shaft and a first driving gear; the side of the curved box facing the human body is a curved surface, and its curved surface matches the human body, and the other sides of the curved box are flat surfaces; the curved box is a hollow box body, and its top surface is through-set; a first fixed shaft is set inside the curved box, and the first driving gear is fixed on the first fixed shaft through a bearing; one end of the pull wire is fixed on the first driving gear, and the other end is connected to the tensioning member; a through hole is opened on the side of the curved box facing the driving member, and a part of the first driving gear passes through the through hole and does not contact the through hole;

[0010] The driving member includes a rectangular box, a second fixed shaft, a second driving gear, a partition and a third driving module; the rectangular box is a hollow box body, and its top surface is through-set; a second fixed shaft is arranged inside the rectangular box, and the second driving gear is fixed on the second fixed shaft through a bearing; a through hole is opened on the side of the rectangular box facing the positioning member, and a part of the second driving gear passes through the through hole and does not contact the through hole; the partition is arranged on the upper side of the second driving gear, and the third driving module is arranged on the partition; the third driving module is connected to the second driving gear, and is used to drive the second driving gear to rotate;

[0011] The driving member presses the positioning member through the pressure spring, and when the pressure spring reaches a specified deformation, the second driving gear is gear-engaged with the first driving gear.

[0012] Optionally, the tensioning member includes a fixed structure plate, a pulling block, a tension sensor, a square plate, a pulling rod and a reset spring; a protruding limiting hole is provided on the fixed structure plate, and the pulling block is slidably arranged on the upper side of the limiting hole; a tension sensor, a square plate and a pulling rod are sequentially arranged on the lower side of the pulling block; the upper side of the pulling rod is connected to the square plate, and the lower side passes through the fixed structure plate; the reset spring is sleeved on the outside of the pulling rod; a connecting hole matching the wire mesh fixing structure is opened on the pulling block.

[0013] Optionally, there are multiple tensioning members, and the number of the third driving modules, the second driving gear, the first driving gear, and the pulling wires corresponds to the multiple tensioning members.

[0014] Optionally, the middle portion of the first driving gear is a toothless ring structure, and a wire fixing terminal is provided in the middle portion of the first driving gear.

[0015] Optionally, the middle part of the second driving gear is a one-way limiting tooth, and the two sides of the second driving gear are conventional teeth, the size of the conventional teeth is larger than the one-way limiting tooth, and the one-way limiting tooth is arranged in the middle of the conventional teeth on both sides and does not affect the conventional teeth; a one-way limiting block is arranged on the lower side of the second driving gear, and the one-way limiting block is connected to the one-way limiting tooth; one side of the one-way limiting tooth is an inclined surface, and the other side is a plane; the one-way limiting block includes a wedge block, a spring and a limiting shell; the inclined side of the wedge block is arranged facing the inclined surface of the one-way limiting tooth.

[0016] Optionally, the wire mesh fixing structure includes a cylindrical block and an elastic wire mesh; the cylindrical blocks are multiple in number and are arranged on both sides of the elastic wire mesh, and the number of the cylindrical blocks on each side is equal and is arranged at equal intervals.

[0017] Optionally, a through hole is provided on the side of the positioning member facing the driving member, and a limiting guide rod is provided on the side of the driving member facing the positioning member, and the limiting guide rod passes through the through hole; the pressure spring is sleeved on the outside of the limiting guide rod.

[0018] Optionally, a contact sensor is provided between the positioning member and the driving member, and the clamping process is stopped when the second driving gear contacts the first driving gear.

[0019] Compared with the prior art, the present invention has achieved the following technical effects:

[0020] 1. Adaptive fixation is performed for different patients or different treatment parts to improve the fixation effect; pre-clamping through positioning components and downward constraint combined with the wire mesh fixing structure can effectively alleviate hard contact during fixation and improve the fixation method compared to the traditional fixing structure.

[0021] 2. The number of cylindrical blocks in the wire mesh fixing structure is multiple, and the number of tensioning members is multiple, which can achieve the same tension in each cross section of the elastic wire mesh, increase the force uniformity, and improve the tensioning effect; after completion, the lateral adjustment structure can be directly adjusted, and the tensioning member can be directly released at the moment when the driving member and the positioning member are separated, thereby reducing the fixing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a body adaptive positioning radiotherapy device provided by one embodiment of the present invention;

[0023] Figure 2 A schematic structural diagram of a positioning device in a body adaptive positioning radiotherapy device provided by one embodiment of the present invention;

[0024] Figure 3 A schematic structural diagram of a transverse adjustment structure and a longitudinal adjustment structure in a body adaptive positioning radiotherapy device provided by an embodiment of the present invention;

[0025] Figure 4 A schematic structural diagram of a positioning clamping structure in a body adaptive positioning radiotherapy device provided by one embodiment of the present invention;

[0026] Figure 5 A schematic structural diagram of a positioning member and a driving member in a positioning clamping structure in a body adaptive positioning radiotherapy device provided by one embodiment of the present invention;

[0027] Figure 6 A schematic structural diagram of a tensioning member in a body adaptive positioning radiotherapy device provided by an embodiment of the present invention;

[0028] Figure 7 A schematic diagram of the internal components of a positioning clamping structure in a body adaptive positioning radiotherapy device provided by one embodiment of the present invention;

[0029] Figure 8 A schematic diagram of the working principle of a tensioning member in a body adaptive positioning radiotherapy device provided by one embodiment of the present invention;

[0030] Fig. 9 A schematic diagram of a limiting structure of a second driving gear in a body adaptive positioning radiotherapy device provided by an embodiment of the present invention;

[0031] Fig.10 A schematic structural diagram of a screen fixing structure in a body adaptive positioning radiotherapy device provided by an embodiment of the present invention.

[0032] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0034] like Figure 1-10As shown, an embodiment of the present invention provides a body adaptive positioning radiotherapy device, comprising: a radiotherapy instrument 1, a treatment bed 2 and a positioning device 3;

[0035] The radiotherapy apparatus 1 comprises a rotating support 11 and a radiation source 12. The radiation source 12 is arranged inside the rotating support. The rotating support 11 can drive the radiation source 12 to make a circular motion.

[0036] The treatment bed 2 includes an adjustment platform 21 and a fixed bed 22. The fixed bed 22 is arranged on the upper side of the adjustment platform 21. The adjustment platform 21 can drive the fixed bed 22 to perform lifting or horizontal movement.

[0037] The positioning device 3 is arranged on the upper side of the treatment bed 2, and the positioning device 3 includes a lateral adjustment structure 31, a longitudinal adjustment structure 32, a positioning clamping structure 33 and a wire mesh fixing structure 34; the lateral adjustment structure 31 and the longitudinal adjustment structure 32 are used to adjust the position of the positioning clamping structure 33; the positioning clamping structure 33 is used to fix a specified position of the human body (such as the head, shoulders, etc.); the wire mesh fixing structure 34 is arranged on the upper side of the positioning clamping structure 33, and after the positioning clamping structure 33 reaches the specified position, the wire mesh fixing structure 34 covers the specified position of the human body and applies a downward restraining force.

[0038] Optionally, the lateral adjustment structure 31 includes a first guide rail 311, a first slider 312, a double-threaded screw 313 and a first driving module 314 arranged laterally; the first slider 312 is arranged on the first guide rail 311, and a first sliding groove matching the first guide rail 311 is arranged on the first slider 312, and a screw groove matching the double-threaded screw 313 is arranged on the outer side of the first sliding groove, and the double-threaded screw 313 passes through the screw groove to drive the first slider 312 to move; the double-threaded screw 313 is provided with threads with different directions on both sides, and a first driving tooth is provided in the middle; the first driving module 314 is connected to the first driving tooth, and is used to drive the double-threaded screw 313 to rotate (the rotation of the double-threaded screw 313 can drive the first sliders 312 on both sides to move inward or outward at the same time).

[0039] The longitudinal adjustment structure 32 includes a longitudinally arranged second guide rail 315, a sliding box 321, a second driving module 322, a cross limiting hole 323 and a track tooth 324; the second guide rail 315 is arranged on the upper side of the first sliding block 312; the cross limiting holes 323 are opened on both sides of the sliding box 321, and the second guide rail 315 passes through the cross limiting holes 323; the track tooth 324 is arranged on the upper side of the second guide rail 315; the second driving module 322 is fixed on the sliding box 321 and is connected to the track tooth 324, so as to drive the sliding box 321 to move along the second guide rail 315.

[0040] Optionally, the positioning clamping structure 33 includes a positioning member 331, a driving member 332, a tensioning member 333 and a pressure spring 35; the pressure spring 35 is disposed between the positioning member 331 and the driving member 332;

[0041] The positioning member 331 includes a curved box 3311, a pull wire 3312, a first fixed shaft 3313 and a first driving gear 3314; the side of the curved box 3311 facing the human body is a curved surface, and its curve matches the human body (the curved surface can be provided with an elastic pad matching the human body), and the other surfaces of the curved box 3311 are flat surfaces; the curved box 3311 is a hollow box body, and its top surface is through-set; a first fixed shaft 3313 is provided inside the curved box 3311, and the first driving gear 3314 is fixed on the first fixed shaft 3313 through a bearing; one end of the pull wire 3312 is fixed on the first driving gear 3314, and the other end is connected to the tensioning member 333; a through hole is opened on the side of the curved box 3311 facing the driving member 332, and a part of the first driving gear 3314 passes through the through hole and does not contact the through hole;

[0042] The driving member 332 includes a rectangular box 3321, a second fixed shaft 3322, a second driving gear 3323, a partition 3324 and a third driving module 3325; the rectangular box 3321 is a hollow box body, and its top surface is through-set; the second fixed shaft 3322 is arranged inside the rectangular box 3321, and the second driving gear 3323 is fixed on the second fixed shaft 3322 through a bearing; the rectangular box 3321 is provided with a through hole on one side facing the positioning member 331, and a part of the second driving gear 3323 passes through the through hole and does not contact the through hole; the partition 3324 is arranged on the upper side of the second driving gear 3323, and the third driving module 3325 is arranged on the partition 3324; the third driving module 3325 is connected to the second driving gear 3323, and is used to drive the second driving gear 3323 to rotate;

[0043] The driving member 332 presses the positioning member 331 through the pressure spring 35 . When the pressure spring 35 reaches a specified deformation, the second driving gear 3323 is gear-engaged with the first driving gear 3314 .

[0044] Optionally, the tensioning member 333 includes a fixed structure plate 3330, a pull block 3331, a tension sensor 3332, a square plate 3333, a pull rod 3334 and a reset spring 3334; the fixed structure plate 3330 is provided with a protruding limiting hole, and the pull block 3331 is slidably arranged on the upper side of the limiting hole; the pull block 3331 is sequentially provided with a tension sensor 3332, a square plate 3333 and a pull rod 3334 on the lower side; the pull rod 3334 is connected to the square plate 3333 on the upper side and passes through the fixed structure plate 3330 on the lower side; the reset spring 3334 is sleeved on the outer side of the pull rod 3334; the pull block 3331 is provided with a connecting hole matching the wire mesh fixing structure 34.

[0045] Furthermore, the number of the tensioning members 333 is multiple (three, four...ten), and the number of the third driving modules 3325, the second driving gear 3323, the first driving gear 3314, and the pulling wires 3312 corresponds to it.

[0046] Optionally, the middle portion of the first driving gear 3314 is a toothless ring structure, and a wire fixing terminal is provided in the middle portion of the first driving gear 3314 .

[0047] Optionally, the middle part of the second driving gear 3323 is a one-way limiting tooth, and the two sides of the second driving gear 3323 are conventional teeth, the size of the conventional teeth is larger than the one-way limiting tooth, and the one-way limiting tooth is arranged in the middle of the conventional teeth on both sides and does not affect the conventional teeth; a one-way limiting block 3326 is arranged on the lower side of the second driving gear 3323, and the one-way limiting block 3326 is connected to the one-way limiting tooth; one side of the one-way limiting tooth is an inclined surface, and the other side is a plane; the one-way limiting block 3326 includes a wedge block, a spring and a limiting shell; the inclined side of the wedge block is arranged facing the inclined surface of the one-way limiting tooth.

[0048] Optionally, the wire mesh fixing structure 34 includes a cylindrical block 341 and an elastic wire mesh 342; the cylindrical blocks 341 are multiple (three, four...ten), arranged on both sides of the elastic wire mesh 342, and the number of cylindrical blocks 341 on each side is equal and arranged at equal intervals.

[0049] Optionally, a through hole is opened on the side of the positioning member 331 facing the driving member 332, and a limiting guide rod is provided on the side of the driving member 332 facing the positioning member 331, and the limiting guide rod passes through the through hole; the pressure spring 35 is sleeved on the outside of the limiting guide rod.

[0050] Optionally, a through hole is provided inside the pull rod 3334, a through hole is provided inside the limit guide rod, a through hole is provided on the outward side of the driving member 332, and the lead wire of the tension sensor 3332 is connected to the outside via the through hole.

[0051] Optionally, a contact sensor is provided between the positioning member 331 and the driving member 332 , and when the second driving gear 3323 contacts the first driving gear 3314 , the clamping process is stopped.

[0052] Optionally, the positioning device 3 includes a control module and a power supply module; the control module is electrically connected to each driving module and each sensor.

[0053] The working principle of a body adaptive positioning radiotherapy device is as follows: the patient lies on the treatment bed 2, determines the treatment part, and the patient's treatment part is adaptively fixed by the positioning device 3. After the fixation is completed, the radiotherapy instrument 1 is used for treatment. The process of adaptive fixing of the positioning device 3 is as follows: the positioning clamping structure 33 is adjusted to the treatment part by the longitudinal adjustment structure 32, and the positioning clamping structure 33 is tightened by the transverse adjustment structure 31; after the positioning clamping structure 33 is tightened, the driving member 332 squeezes the positioning member 331 through the pressure spring 35, and when the pressure spring 35 reaches the specified deformation, the second driving gear 3323 is geared with the first driving gear 3314 and stops tightening, and the second driving gear 3323 and the first driving gear 3314 are driven to rotate by the third driving module 3325, and the pull wire 3312 pulls the pull rod 3334 to move downward, and the pull rod 3334 drives the pull block 3331 and the wire mesh fixing structure 34 to move downward, and when the tension sensor reaches the set tension, the fixing work is completed to achieve adaptive fixing of the specified part. After completion, the lateral adjustment structure 31 can be directly adjusted, and the tensioning member 333 can be directly released at the moment when the driving member 332 and the positioning member 331 are separated, thereby reducing the fixing time.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A body adaptive positioning radiotherapy device, comprising: A radiotherapy apparatus, a treatment bed and a positioning device; the radiotherapy apparatus comprises a rotating bracket and a radiation source, wherein the radiation source is arranged inside the rotating bracket, and the rotating bracket can drive the radiation source to perform circular motion; The treatment bed includes an adjustment platform and a fixed bed, wherein the fixed bed is arranged on the upper side of the adjustment platform, and the adjustment platform can drive the fixed bed to perform lifting movement or horizontal movement; The positioning device is arranged on the upper side of the treatment bed, and comprises a transverse adjustment structure, a longitudinal adjustment structure, a positioning clamping structure and a wire mesh fixing structure; the transverse adjustment structure and the longitudinal adjustment structure are used to adjust the position of the positioning clamping structure; the positioning clamping structure is used to fix the designated position of the human body; the wire mesh fixing structure is arranged on the upper side of the positioning clamping structure, and after the positioning clamping structure reaches the designated position, the wire mesh fixing structure covers the designated position of the human body and applies a downward restraining force; The positioning and clamping structure comprises a positioning member, a driving member, a tensioning member and a pressure spring; the pressure spring is arranged between the positioning member and the driving member; The positioning member includes a curved box, a pull wire, a first fixed shaft and a first driving gear; the side of the curved box facing the human body is a curved surface, and its curved surface matches the human body, and the other sides of the curved box are flat surfaces; the curved box is a hollow box body, and its top surface is through-set; a first fixed shaft is set inside the curved box, and the first driving gear is fixed on the first fixed shaft through a bearing; one end of the pull wire is fixed on the first driving gear, and the other end is connected to the tensioning member; a through hole is opened on the side of the curved box facing the driving member, and a part of the first driving gear passes through the through hole and does not contact the through hole; The driving member includes a rectangular box, a second fixed shaft, a second driving gear, a partition and a third driving module; the rectangular box is a hollow box body, and its top surface is through-set; a second fixed shaft is arranged inside the rectangular box, and the second driving gear is fixed on the second fixed shaft through a bearing; a through hole is opened on the side of the rectangular box facing the positioning member, and a part of the second driving gear passes through the through hole and does not contact the through hole; the partition is arranged on the upper side of the second driving gear, and the third driving module is arranged on the partition; the third driving module is connected to the second driving gear, and is used to drive the second driving gear to rotate; The driving member presses the positioning member through the pressure spring, and when the pressure spring reaches a specified deformation, the second driving gear is gear-engaged with the first driving gear.

2. The device according to claim 1, characterized in that in, The lateral adjustment structure comprises a first guide rail, a first slider, a double-threaded lead screw and a first driving module arranged laterally; the first slider is arranged on the first guide rail, a first sliding groove matching the first guide rail is arranged on the first slider, a lead screw groove matching the double-threaded lead screw is arranged on the outer side of the first sliding groove, and the double-threaded lead screw passes through the lead screw groove to drive the first slider to move; threads with different directions are arranged on both sides of the double-threaded lead screw, and a first driving tooth is arranged in the middle; the first driving module is connected to the first driving tooth, and is used to drive the double-threaded lead screw to rotate; The longitudinal adjustment structure includes a longitudinally arranged second guide rail, a sliding box, a second drive module, a cross limit hole and track teeth; the second guide rail is arranged on the upper side of the first sliding block; the cross limit holes are opened on both sides of the sliding box, and the second guide rail passes through the cross limit holes; the track teeth are arranged on the upper side of the second guide rail; the second drive module is fixed on the sliding box and connected to the track teeth, and is used to drive the sliding box to move along the second guide rail.

3. The device according to claim 1, characterized in that in, The tensioning member includes a fixed structure plate, a pulling block, a tension sensor, a square plate, a pulling rod and a reset spring; a protruding limiting hole is arranged on the fixed structure plate, and the pulling block is slidably arranged on the upper side of the limiting hole; a tension sensor, a square plate and a pulling rod are arranged in sequence on the lower side of the pulling block; the upper side of the pulling rod is connected to the square plate, and the lower side passes through the fixed structure plate; the reset spring is sleeved on the outer side of the pulling rod; a connecting hole matching the wire mesh fixing structure is opened on the pulling block.

4. The device according to claim 3, characterized in that in, The number of the tensioning members is plural, and the number of the third driving modules, the second driving gear, the first driving gear, and the pulling wires corresponds to the number of the tensioning members.

5. The device according to claim 4, characterized in that in, The middle portion of the first driving gear is a toothless ring structure, and a wire fixing terminal is arranged at the middle portion of the first driving gear.

6. The device according to claim 5, characterized in that in, The middle part of the second driving gear is a one-way limiting tooth, and the two sides of the second driving gear are conventional teeth. The size of the conventional teeth is larger than the one-way limiting teeth, and the one-way limiting teeth are arranged in the middle of the conventional teeth on both sides and do not affect the conventional teeth; a one-way limiting block is arranged on the lower side of the second driving gear, and the one-way limiting block is connected to the one-way limiting tooth; one side of the one-way limiting tooth is an inclined surface, and the other side is a plane; the one-way limiting block includes a wedge block, a spring and a limiting shell; the inclined side of the wedge block is arranged facing the inclined surface of the one-way limiting tooth.

7. The device according to claim 6, characterized in that in, The wire mesh fixing structure comprises cylindrical blocks and an elastic wire mesh; the cylindrical blocks are multiple in number and are arranged on both sides of the elastic wire mesh, and the number of the cylindrical blocks on each side is equal and arranged at equal intervals.

8. The device according to claim 1, characterized in that in, A through hole is provided on one side of the positioning member facing the driving member, and a limiting guide rod is provided on one side of the driving member facing the positioning member. The limiting guide rod passes through the through hole; the pressure spring is sleeved on the outer side of the limiting guide rod.

9. The device according to claim 1, characterized in that in, A contact sensor is provided between the positioning member and the driving member, and when the second driving gear contacts the first driving gear, the clamping process is stopped.

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