A radiotherapy fixing device for total bone marrow total lymph irradiation

Abstract

This invention provides a radiotherapy fixation device for whole bone marrow and whole lymphatic irradiation, belonging to the technical field of radiotherapy auxiliary devices. It includes a top bed board mounted on top of a bottom bed board, with a rotating mechanism installed between the bottom and top bed boards. It also includes a support mechanism for supporting and positioning the patient's pelvis, comprising a U-shaped mounting bracket fixedly connected to the top of the top bed board. By setting up the support mechanism, this invention can support and position the patient's sacrum and anterior superior iliac spine using biomimetic sacral and anterior superior iliac spine support pads, respectively. This positioning method allows the support mechanism to directly achieve positioning based on the bony landmarks of the patient's sacrum and anterior superior iliac spine, unaffected by soft tissue deformation. This effectively avoids the loss of positioning reference due to soft tissue stretching and deformation after patient repositioning, continuously ensuring positioning accuracy.

Description

Technical Field

[0001] This invention relates to the field of radiotherapy auxiliary equipment technology, and in particular to a radiotherapy fixation device for whole bone marrow and whole lymphatic irradiation. Background Technology

[0002] Whole bone marrow and whole lymphatic irradiation is an important pretreatment radiotherapy technique for patients with hematologic malignancies before hematopoietic stem cell transplantation. The target area covers from the top of the skull to the soles of the feet. Due to the limitations of the length of conventional radiotherapy treatment beds and the mechanical travel limitations of accelerators and other centers, a two-stage treatment plan must be adopted in clinical practice: the patient first undergoes treatment in a head-first position for the upper body, and then is rotated 180° to a legs-first position for the lower body. During the rotation, multiple staff members need to exert force at both ends to rotate the patient, which increases the risk of the patient falling off the bed. After the rotation, the patient may not be completely aligned with the same straight line, which may lead to distal displacement. Furthermore, the two treatment stages form a connection in the pelvic region, requiring a smooth transition in dose distribution in this area. Otherwise, dose cold spots or hot spots may occur, affecting the treatment effect and even increasing the risk of recurrence.

[0003] Existing fixation methods such as foam, vacuum pads, and thermoplastic films all establish the positioning reference on the patient's skin or soft tissue. When switching from a head-first to a legs-first position, due to the change in the direction of gravity, the soft tissues (abdomen, buttocks) undergo non-negligible deformation and displacement, resulting in an irreversible change in the fit between the fixation device and the patient's body surface, and the reference in the connection area is lost. Therefore, this invention provides a radiotherapy fixation device for whole bone marrow and whole lymphatic irradiation to meet the requirements. Summary of the Invention

[0004] The technical problem to be solved by this invention is to provide a radiotherapy fixation device for whole bone marrow and whole lymphatic irradiation. By setting up a support mechanism, the sacrum and anterior superior iliac spine of the patient can be supported and positioned by means of a sacral bionic support pad and anterior superior iliac spine bionic support pad, respectively. This positioning method allows the support mechanism to be positioned directly based on the bony landmarks of the patient's sacrum and anterior superior iliac spine, without being affected by the deformation of the human body's soft tissue. It can effectively avoid the problem of loss of positioning reference due to soft tissue stretching and deformation after the patient's body position is changed, and continuously ensure positioning accuracy. Through the above setting, the problem of loss of the reference in the connection area caused by the change of gravity direction when switching from head-in-first position to leg-in-first position in existing fixation methods is solved.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A radiotherapy fixation device for whole bone marrow and whole lymphatic irradiation includes a top bed board mounted on top of a bottom bed board. A rotating mechanism is installed between the bottom bed board and the top bed board for adjusting the relative position between them. The rotating mechanism includes a mounting base and a gear disk fixedly connected to the top of the bottom bed board and the bottom of the top bed board, respectively. A drive mechanism is fixedly connected to the outer wall of the mounting base. The device also includes a support mechanism for supporting and positioning the patient's pelvis. The support mechanism includes a U-shaped mounting frame fixedly connected to the top of the top bed board. A first base is mounted in the middle of the U-shaped mounting frame, and second bases are mounted on both sides of the U-shaped mounting frame. A sacral bionic support pad and an anterior superior iliac spine bionic support pad are respectively mounted on the top of the first base and the second base.

[0006] Optionally, the drive mechanism is used to drive the gear disk to rotate on the top of the mounting base. Mounting plates are fixedly connected to both ends of the top bed plate. Locking pins are fixedly connected to the outer wall of the mounting plates. Insertion holes corresponding to the positions of the locking pins are opened on the bottom bed plate.

[0007] Optionally, the U-shaped mounting bracket has a plurality of positioning holes, and the top bed board has mounting holes corresponding to the positions of the positioning holes. A locking knob is inserted into the U-shaped mounting bracket, and the locking knob passes through the positioning holes and is threaded into the mounting holes.

[0008] Optionally, a first support rod and a second support rod are fixedly connected to the outer walls of the first base and the second base, respectively. A first adjustment knob and a second adjustment knob are inserted into the first support rod and the second support rod, respectively. A first adjustment groove and a second adjustment groove corresponding to the positions of the first adjustment knob and the second adjustment knob are respectively opened in the middle and on both sides of the U-shaped mounting bracket.

[0009] Optionally, the first adjustment knob and the second adjustment knob are respectively inserted into the first support rod and the second support rod, and are locked in the first adjustment groove and the second adjustment groove by the nut thread. The top bed board is provided with a clearance groove corresponding to the position of the first adjustment groove and the second adjustment groove.

[0010] Optionally, a support plate is fixedly connected to the top of both the first base and the second base, and a floating plate is installed on the top of each support plate. The sacral bionic support pad and the anterior superior iliac spine bionic support pad are both installed on the top of the floating plate.

[0011] Optionally, a plurality of guide rods are fixedly connected to the bottom of the floating plate. The guide rods are inserted through the support plate. Springs are sleeved on the outer wall of the guide rods. The two ends of the springs are fixed to the bottom of the floating plate and the top of the support plate, respectively.

[0012] Optionally, an indicator cylinder is fixedly connected to the bottom of the support plate, and an indicator window is provided on the indicator cylinder.

[0013] Optionally, the bottom of both the sacral bionic support pad and the anterior superior iliac spine bionic support pad are fixedly connected with a locking block, and the top of the floating plate is provided with a groove that matches the outline of the locking block, and the locking block is engaged in the groove.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: In the above solution, by setting up a rotating mechanism, when it is necessary to turn the patient's position, medical staff can drive the top bed board to rotate 180 degrees by operating the drive mechanism, realizing the rapid turning of the patient's position. After adjustment, the bottom bed board and the top bed board are locked and fixed by locking pins, ensuring the stability of the overall structure during radiotherapy. Compared with the existing position adjustment methods, the adjustment operation of this device is simple and efficient. The patient's posture is stable and safe during the position adjustment process, which can prevent the patient from falling off the bed. At the same time, it can avoid radiotherapy deviation and safety problems caused by positional shift. It keeps the patient's position on the same straight line before and after the turn, improves repeatability, greatly reduces the workload of medical staff, and meets the needs of clinical radiotherapy.

[0015] By setting up a support mechanism, the sacrum and anterior superior iliac spine can be supported and positioned using biomimetic support pads for the sacrum and anterior superior iliac spine, respectively. This positioning method allows the support mechanism to be positioned directly based on the bony landmarks of the sacrum and anterior superior iliac spine, unaffected by soft tissue deformation. This effectively avoids the loss of positioning reference due to soft tissue stretching and deformation after patient repositioning, ensuring continuous positioning accuracy. The modular and detachable structure of the support mechanism allows the fixation device to have a mechanical repositioning process of "disassembly → rotation → reassembly". This can control the spatial position deviation of the patient's pelvis in the two-stage treatment within the mechanical cooperation gap level, ensuring that the spatial position of the patient's pelvis is consistent between the two treatment stages. This ensures a smooth dose transition in the radiotherapy transition zone, avoiding dose cold spots and hot spots. While improving overall treatment efficiency, this significantly improves the accuracy of patient positioning and clinical treatment safety. Attached Figure Description

[0016] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0017] Figure 1 A three-dimensional structural diagram of a radiotherapy fixation device used for whole bone marrow and whole lymphatic irradiation; Figure 2 This is a schematic diagram of the three-dimensional structure of the bottom and top bed boards; Figure 3 for Figure 2 Enlarged 3D structural diagram at point A; Figure 4 A three-dimensional structural diagram of the top bed board and rotating mechanism; Figure 5 A first-person perspective three-dimensional structural diagram of the support mechanism and pelvis; Figure 6 A two-dimensional structural diagram of the support mechanism and pelvis from a second-view perspective. Figure 7 A schematic diagram of the three-dimensional structure of the supporting mechanism; Figure 8 A schematic diagram of the three-dimensional structure of the U-shaped mounting bracket; Figure 9 A schematic diagram of the three-dimensional structure of the first base, support plate, floating plate, and sacral biomimetic support pad; Figure 10 for Figure 9 Enlarged 3D structural diagram at point B; Figure 11 A cross-sectional three-dimensional structural diagram of the first base, support plate, floating plate, and sacral bionic support pad; Figure 12 for Figure 11 Enlarged 3D structural diagram at point C; Figure 13 This is a schematic diagram of the three-dimensional structure of the second base, support plate, floating plate, and biomimetic support pad for the anterior superior iliac spine.

[0018] Figure label: 1. Bottom bed board; 2. Top bed board; 3. Mounting base; 4. Gear disk; 5. Drive mechanism; 6. Mounting plate; 7. Locking pin; 8. Insertion hole; 9. Clearance groove; 10. Mounting hole; 11. U-shaped mounting bracket; 12. First adjustment slide; 13. Second adjustment slide; 14. Positioning hole; 15. Locking knob; 16. First base; 17. First support rod; 18. First adjustment knob; 19. Second base; 20. Second support rod; 21. Second adjustment knob; 22. Support plate; 23. Floating plate; 24. Guide rod; 25. Spring; 26. Indicator cylinder; 27. Indicator window; 28. Sacral bionic support pad; 29. ​​Anterior superior iliac spine bionic support pad; 30. Locking block.

[0019] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0020] The following is a detailed description of a radiotherapy fixation device for whole bone marrow and whole lymph node irradiation provided by the present invention, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0021] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0022] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0023] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0024] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0025] like Figures 1 to 4 As shown, an embodiment of the present invention provides a radiotherapy fixation device for whole bone marrow and whole lymph node irradiation, including a top bed board 2 installed on top of a bottom bed board 1. A rotating mechanism is installed between the bottom bed board 1 and the top bed board 2. The rotating mechanism is used to adjust the relative position between the bottom bed board 1 and the top bed board 2. The rotating mechanism includes a mounting base 3 and a gear disk 4 respectively fixedly connected to the top of the bottom bed board 1 and the bottom of the top bed board 2. A driving mechanism 5 is fixedly connected to the outer wall of the mounting base 3. The driving mechanism 5 is used to drive the gear disk 4 to rotate on the top of the mounting base 3. Mounting plates 6 are fixedly connected to both ends of the top bed board 2. Locking pins 7 are fixedly connected to the outer wall of the mounting plates 6. Insertion holes 8 corresponding to the positions of the locking pins 7 are opened on the bottom bed board 1.

[0026] In the above structure, a rotating mechanism is installed between the bottom bed board 1 and the top bed board 2, allowing medical personnel to rotate and adjust the relative position between the bottom bed board 1 and the top bed board 2. Specifically, under the driving action of the drive mechanism 5, the gear disk 4 can rotate on the top of the mounting base 3. Since the mounting base 3 and the gear disk 4 are fixed on the bottom bed board 1 and the top bed board 2 respectively, the drive mechanism 5 can drive the top bed board 2 as a whole to rotate and adjust on the top of the bottom bed board 1 when it is running. The drive mechanism 5 is mainly composed of a motor and gears. The gears on the drive mechanism 5 mesh with the gear disk 4. Its drive transmission principle is a mature existing technology in this field and will not be described in detail in this technical solution.

[0027] Furthermore, by installing mounting plates 6 and locking pins 7 at both ends of the top bed board 2, the relative positions of the bottom bed board 1 and the top bed board 2 after rotational adjustment can be fixed. Medical personnel can insert the locking pins 7 into the corresponding sockets 8 according to their needs. The limiting cooperation between the locking pins 7 and the sockets 8 restricts the relative displacement between the bottom bed board 1 and the top bed board 2, thus achieving stable positioning. The working principle of the locking pins 7 and the sockets 8 is a mature existing technology, and this technical solution will not be elaborated here. In summary, by setting up a rotating mechanism, medical personnel can automatically adjust the relative position between the bottom bed board 1 and the top bed board 2 using the drive mechanism 5. During whole bone marrow and whole lymphatic irradiation therapy, when it is necessary to turn the patient's position, medical personnel can operate the drive mechanism 5 to drive the top bed board 2 to complete a 180-degree rotation, achieving rapid patient repositioning. After adjustment, the bottom bed board 1 and the top bed board 2 are locked and fixed by the locking pin 7, ensuring the stability of the overall structure during radiotherapy. Compared with existing position adjustment methods, this device is simple and efficient to operate. During position adjustment, the patient's posture is highly stable, with a high safety factor, preventing patients from falling off the bed. It also avoids radiotherapy deviations and safety issues caused by positional shifts, keeping the patient's position on the same straight line before and after repositioning, improving repeatability, significantly reducing the workload of medical personnel, and meeting the needs of clinical radiotherapy.

[0028] As one implementation method in this embodiment, such as Figures 1 to 8 As shown, the support mechanism is used to support and position the patient's pelvis. The support mechanism includes a U-shaped mounting frame 11 fixedly connected to the top of the top bed board 2. The U-shaped mounting frame 11 has several positioning holes 14. The top bed board 2 has mounting holes 10 corresponding to the positions of the positioning holes 14. A locking knob 15 is inserted into the U-shaped mounting frame 11. The locking knob 15 passes through the positioning holes 14 and is threaded into the mounting holes 10. A first base 16 is installed in the middle of the U-shaped mounting frame 11. Second bases 19 are installed on both sides of the U-shaped mounting frame 11. A sacral bionic support pad 28 and anterior superior iliac spine bionic support pad 29 are respectively installed on the top of the first base 16 and the second base 19.

[0029] In the above structure, the U-shaped mounting bracket 11 is threadedly locked into the mounting hole 10 at the top of the top bed board 2 by means of the locking knob 15. Medical personnel can install and remove the U-shaped mounting bracket 11 by manually turning the locking knob 15. In addition, the middle and sides of the U-shaped mounting bracket 11 are respectively equipped with sacral bionic support pads 28 and anterior superior iliac spine bionic support pads 29 for supporting the patient's sacrum and anterior superior iliac spine. When the patient lies on the top of the top bed board 2, the sacral bionic support pads 28 and anterior superior iliac spine bionic support pads 29 can be used to support and position the patient's sacrum and anterior superior iliac spine respectively. This positioning method allows the support mechanism to be positioned directly based on the bony landmarks of the patient's sacrum and anterior superior iliac spine, without being affected by the deformation of the human body's soft tissue. It can effectively avoid the problem of loss of positioning reference due to soft tissue stretching and deformation after the patient's body position is turned, and continuously ensure positioning accuracy.

[0030] Furthermore, during whole bone marrow and whole lymphatic irradiation therapy, when it is necessary to rotate the patient's position, medical staff can first remove the U-shaped mounting bracket 11 from the top of the top bed board 2, and then use the drive mechanism 5 to rotate and adjust the relative position between the bottom bed board 1 and the top bed board 2. After the angle adjustment is completed, the U-shaped mounting bracket 11 is fixedly installed on the top bed board 2. Through the mechanical repositioning process of "disassembly → rotation → reinstallation", the spatial position deviation of the patient's pelvis in the two-stage treatment can be controlled within the mechanical cooperation gap level, ensuring that the spatial position height of the patient's pelvis is consistent in the two stages of treatment, ensuring a smooth transition of dose in the radiotherapy transition zone, avoiding dose cold spots and hot spots, and improving the overall treatment efficiency while significantly improving the accuracy of patient position adjustment and clinical treatment safety.

[0031] In this embodiment, as Figures 1 to 9 As shown, a first support rod 17 and a second support rod 20 are fixedly connected to the outer walls of the first base 16 and the second base 19, respectively. A first adjustment knob 18 and a second adjustment knob 21 are inserted into the first support rod 17 and the second support rod 20, respectively. The middle and both sides of the U-shaped mounting bracket 11 are respectively provided with a first adjustment groove 12 and a second adjustment groove 13 corresponding to the positions of the first adjustment knob 18 and the second adjustment knob 21. The first adjustment knob 18 and the second adjustment knob 21 are respectively inserted through the first support rod 17 and the second support rod 20, and are locked in the first adjustment groove 12 and the second adjustment groove 13 by nuts. The top bed board 2 is provided with a clearance groove 9 corresponding to the positions of the first adjustment groove 12 and the second adjustment groove 13.

[0032] In the above structure, the first base 16 and the second base 19 are respectively limited and slidable within the first adjusting groove 12 and the second adjusting groove 13 on the U-shaped mounting bracket 11 by means of the first support rod 17 and the second support rod 20. The working principle of the sliding cooperation between the first base 16 and the second base 19 and the U-shaped mounting bracket 11 is the same. Therefore, this embodiment only elaborates on the cooperation principle between the first base 16 and the U-shaped mounting bracket 11. The cooperation principle between the second base 19 and the U-shaped mounting bracket 11 is not described here. Specifically, the first adjusting knob 18 is sequentially inserted through the first... The first support rod 17 is threaded with a nut at its end in the first adjustment groove 12 on the support rod 17 and the U-shaped mounting bracket 11. The nut is positioned at the bottom of the U-shaped mounting bracket 11. Therefore, medical personnel can adjust the clamping force between the first support rod 17 and the U-shaped mounting bracket 11 by turning the first adjustment knob 18. This allows the first support rod 17 to slide along the contour of the first adjustment groove 12. After the position adjustment is completed, turning the first adjustment knob 18 again will lock the first support rod 17 in place, thus completing the position fixing operation of the first base 16.

[0033] In summary, medical personnel can slide the first base 16 and the second base 19, causing them to slide along the first adjusting groove 12 and the second adjusting groove 13 respectively. They can then lock and fix the first base 16 and the second base 19 by turning the first adjusting knob 18 and the second adjusting knob 21 respectively. Before whole bone marrow and whole lymphatic irradiation therapy, medical personnel can adaptively adjust the installation position of the first base 16 and the second base 19 according to the different pelvic contours and sizes of different patients, ensuring the sacral bionic support pad 2... The sacral bionic support pad 28 and the anterior superior iliac spine bionic support pad 29 can precisely correspond to support the patient's sacrum and anterior superior iliac spine. After adjustment, the sacral bionic support pad 28 and the anterior superior iliac spine bionic support pad 29 form a triangular contour spatial distribution structure in the patient's pelvic position, which can achieve three-dimensional spatial all-round constraint on the patient's pelvis, so that the spatial position of the patient's pelvis in the top coordinate system of the top bed board 2 is uniquely locked. This structural design can further ensure the high uniformity of the patient's pelvic spatial position during the two-stage rotation treatment, fundamentally improve the positioning accuracy of radiotherapy and ensure the effect of radiotherapy treatment.

[0034] In this embodiment, as Figures 1 to 13 As shown, a support plate 22 is fixedly connected to the top of the first base 16 and the second base 19. A floating plate 23 is installed on the top of the support plate 22. A sacral bionic support pad 28 and anterior superior iliac spine bionic support pad 29 are installed on the top of the floating plate 23. A locking block 30 is fixedly connected to the bottom of the sacral bionic support pad 28 and anterior superior iliac spine bionic support pad 29. A groove adapted to the contour of the locking block 30 is opened on the top of the floating plate 23. The locking block 30 is locked into the groove. Several guide rods 24 are fixedly connected to the bottom of the floating plate 23. The guide rods 24 are inserted through the support plate 22. A spring 25 is sleeved on the outer wall of the guide rod 24. The two ends of the spring 25 are fixed to the bottom of the floating plate 23 and the top of the support plate 22, respectively. An indicator cylinder 26 is fixedly connected to the bottom of the support plate 22. An indicator window 27 is opened on the indicator cylinder 26.

[0035] In the above structure, the support plate 22 and the floating plate 23 are slidably limited by several guide rods 24. Since springs 25 are installed on the outer walls of the guide rods 24, and both ends of the springs 25 are fixed to the support plate 22 and the floating plate 23 respectively, the floating plate 23 always has an upward adaptive elastic force under the elastic force of the springs 25. Because the sacral bionic support pad 28 and the anterior superior iliac spine bionic support pad 29 are both installed on top of the floating plate 23, a vertically floating displacement space is formed between the sacral bionic support pad 28 and the anterior superior iliac spine bionic support pad 29 and the support plate 22. When medical personnel use the sacral bionic support pad 28 and the anterior superior iliac spine bionic support pad 29 to support the patient's sacrum... When the patient is in contact with the anterior superior iliac spine, their own weight will compress the floating plate 23 to adaptively shift slightly towards the support plate 22. At the same time, under the elastic rebound of the spring 25, the floating plate 23 can absorb the micro-movement caused by the patient's breathing fluctuations and minor physical discomfort in real time, and always maintain a constant contact pressure. This effectively avoids the pain and discomfort caused by the hard compression of traditional rigid support structures. In addition, the reverse elastic force provided by the spring 25 can further compress the contact interface between the patient's pelvis and the floating plate 23, improve the stability of the fit, and ultimately achieve the positioning effect of "rigid support and flexible contact". This ensures the rigid stability of the overall support structure and improves the comfort and fit of the patient's treatment position.

[0036] Furthermore, by setting an indicator cylinder 26 at the bottom of the support plate 22 and setting a colored scale strip on the outer wall of the guide rod 24 inserted into the indicator cylinder 26, during the vertical floating displacement of the floating plate 23 relative to the support plate 22, medical personnel can visually judge the contact pressure state between the patient's pelvis and the floating plate 23, the sacral bionic support pad 28, and the anterior superior iliac spine bionic support pad 29 by observing whether a green scale area is displayed inside the indicator window 27. When the green scale area on the guide rod 24 is exactly displayed inside the indicator window 27, it indicates that the patient's pelvis is in good condition. The contact pressure between the patient and the support structure is within a standard and appropriate range, and the contact pressure is ≥2N, which meets the clinical radiotherapy support fit requirements. Through the visual scale indicator structure, medical staff can accurately judge the fit and support status of the patient's sacrum and anterior superior iliac spine with the sacral bionic support pad 28 and the anterior superior iliac spine bionic support pad 29, respectively, to ensure that the support structure fully and stably supports the patient's pelvis, avoids the problems of insufficient support and fit, and further ensures the uniformity of the pelvic spatial position during the two-stage rotation treatment, improving the repeatability of radiotherapy position and the accuracy of treatment.

[0037] Furthermore, both the sacral bionic support pad 28 and the anterior superior iliac spine bionic support pad 29 are made of medical-grade silicone material. They can be individually customized through 3D printing or adopted in a multi-size standard series (S / M / L) to achieve individualized adaptation and matching for different patients' pelvic shapes. Simultaneously, the sacral bionic support pad 28 and the anterior superior iliac spine bionic support pad 29 are quickly and easily connected to the top of the floating plate 23 using a locking block 30. This connection structure is simple to assemble and easy to disassemble, effectively improving the efficiency of preoperative positioning adjustments. The individually customized sacral bionic support pad 28 and the anterior superior iliac spine bionic support pad 29... 9. The device can conform to the bony contours of the patient's bone surface, exhibiting excellent adaptability and providing stable support for the bony landmarks of the pelvis, ensuring effective support and positioning. In addition, the support mechanism of this device is a purely mechanical structure without electronic components or sensors, eliminating the risks of power outages, circuit failures, or signal failures. The structure operates stably and is mechanically controllable throughout the process. Furthermore, this support mechanism is compatible with commonly used fixation methods such as foam adhesive and vacuum pads, allowing for parallel operation without altering existing radiotherapy fixation procedures. Its strong adaptability and low modification costs facilitate its widespread clinical application.

[0038] The working principle of the technical solution provided by this invention is as follows: When the patient is placed in the head-first position, their entire body lies on the foam padding on top of the top of the bed board 2, with the pelvis positioned in the corresponding location on the U-shaped mounting bracket 11. After the initial positioning, the medical staff gently lifts the patient's buttocks and fine-tunes the support position of the sacral bionic support pad 28 by rotating the first adjustment knob 18, ensuring that the top contour of the sacral bionic support pad 28 precisely conforms to the patient's sacral bone surface. Then, the patient's buttocks are slowly lowered, allowing the pelvis to naturally bear pressure and conform to the support structure. The medical staff observes the colored scale status of the guide rod 24 inside the indicator cylinder 26 at the bottom of the sacral bionic support pad 28. When the green scale area on the guide rod 24 is exactly displayed inside the indicator window 27, it is determined that the contact pressure between the patient's pelvis and the sacral bionic support pad 28 is within the standard appropriate range, meeting the conformation pressure requirement of ≥2N. At this point, the first adjustment knob is rotated again. 18. After locking, the sacral bionic support pad 28 is firmly fixed on the U-shaped mounting bracket 11. After the sacral bionic support pad 28 is locked and calibrated, the medical staff continues to rotate the second adjustment knob 21 to finely adjust the support position of the two anterior superior iliac spine bionic support pads 29, so that the two anterior superior iliac spine bionic support pads 29 accurately contact and support the patient's two anterior superior iliac spines, and complete the bony alignment. The scale display status of the guide rod 24 in the bottom indicator cylinder 26 of the anterior superior iliac spine bionic support pad 29 is observed again. After the green scale area of ​​the guide rod 24 is accurately displayed inside the indicator window 27 and the contact pressure reaches the standard range, the second adjustment knob 21 is turned to lock and fix the two anterior superior iliac spine bionic support pads 29, and the three-dimensional bony positioning of the patient's pelvis is completed. Finally, the coordinates of the optical marker points on the patient's body surface are recorded. After calibration, the head-first segment whole bone marrow and whole lymphatic irradiation treatment can be carried out.

[0039] When the head-first position treatment is completed and it is time to switch to the leg-first position, the medical staff first tightens the locking knob 15 to completely remove the entire U-shaped mounting bracket 11 from the top of the top bed board 2, releasing the fixed constraint between the support mechanism and the top bed board 2. Then, the relative position of the bottom bed board 1 and the top bed board 2 is adjusted by the drive mechanism 5, causing the top bed board 2 to rotate 180 degrees on top of the bottom bed board 1. After the position angle is adjusted, the locking pin 7 is inserted into the corresponding insertion hole 8 on the top of the bottom bed board 1 to achieve mechanical locking and positioning of the bottom bed board 1 and the top bed board 2. To ensure the bed structure remains stable and does not shift or shake after flipping, the U-shaped mounting bracket 11 is reassembled and fixed to the top of the top bed board 2. The above-mentioned bony alignment and pressure calibration process is repeated. The sacral bionic support pad 28 and the anterior superior iliac spine bionic support pad 29 accurately support the patient's sacrum and bilateral anterior superior iliac spines, respectively, to complete the positional adaptation and pressure verification. Finally, the coordinates of the patient's optical marker points are verified. The measured coordinate deviation is only 0.05mm, which is within the clinically permissible error range. No secondary adjustment is required. After confirming that the position is accurate, the leg-advanced segment radiotherapy can be carried out.

[0040] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0041] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A radiotherapy fixation device for whole bone marrow and whole lymphatic irradiation, comprising a top bed board mounted on top of a bottom bed board, characterized in that, A rotating mechanism is installed between the bottom bed board and the top bed board. The rotating mechanism is used to adjust the relative position between the bottom bed board and the top bed board. The rotating mechanism includes a mounting base and a gear disk that are respectively fixedly connected to the top of the bottom bed board and the bottom of the top bed board. A drive mechanism is fixedly connected to the outer wall of the mounting base. It also includes a support mechanism for supporting and positioning the patient's pelvis. The support mechanism includes a U-shaped mounting frame fixedly connected to the top of the top bed board. A first base is installed in the middle of the U-shaped mounting frame, and second bases are installed on both sides of the U-shaped mounting frame. A sacral bionic support pad and an anterior superior iliac spine bionic support pad are respectively installed on the top of the first base and the second base.

2. The radiotherapy fixation device for whole bone marrow and whole lymphatic irradiation according to claim 1, characterized in that, The drive mechanism is used to drive the gear disk to rotate on the top of the mounting base. Mounting plates are fixedly connected to both ends of the top bed plate. Locking pins are fixedly connected to the outer wall of the mounting plate. Insertion holes corresponding to the positions of the locking pins are opened on the bottom bed plate.

3. The radiotherapy fixation device for whole bone marrow and whole lymphatic irradiation according to claim 1, characterized in that, The U-shaped mounting bracket has several positioning holes, and the top bed board has mounting holes corresponding to the positions of the positioning holes. A locking knob is inserted into the U-shaped mounting bracket, and the locking knob passes through the positioning holes and is threaded into the mounting holes.

4. The radiotherapy fixation device for whole bone marrow and whole lymphatic irradiation according to claim 1, characterized in that, A first support rod and a second support rod are fixedly connected to the outer walls of the first base and the second base, respectively. A first adjustment knob and a second adjustment knob are inserted into the first support rod and the second support rod, respectively. A first adjustment groove and a second adjustment groove corresponding to the positions of the first adjustment knob and the second adjustment knob are respectively opened in the middle and on both sides of the U-shaped mounting bracket.

5. The radiotherapy fixation device for whole bone marrow and whole lymphatic irradiation according to claim 4, characterized in that, The first adjustment knob and the second adjustment knob are respectively inserted into the first support rod and the second support rod, and are locked in the first adjustment groove and the second adjustment groove by the nut thread. The top bed board is provided with a clearance groove corresponding to the position of the first adjustment groove and the second adjustment groove.

6. The radiotherapy fixation device for whole bone marrow and whole lymphatic irradiation according to claim 1, characterized in that, The top of both the first base and the second base is fixedly connected to a support plate, and a floating plate is installed on the top of each support plate. The sacral bionic support pad and the anterior superior iliac spine bionic support pad are both installed on the top of the floating plate.

7. The radiotherapy fixation device for whole bone marrow and whole lymphatic irradiation according to claim 6, characterized in that, Several guide rods are fixedly connected to the bottom of the floating plate. The guide rods are inserted through the support plate. Springs are sleeved on the outer wall of the guide rods. The two ends of the springs are fixed to the bottom of the floating plate and the top of the support plate, respectively.

8. The radiotherapy fixation device for whole bone marrow and whole lymphatic irradiation according to claim 6, characterized in that, An indicator cylinder is fixedly connected to the bottom of the support plate, and an indicator window is provided on the indicator cylinder.

9. The radiotherapy fixation device for whole bone marrow and whole lymphatic irradiation according to claim 6, characterized in that, Both the sacral bionic support pad and the anterior superior iliac spine bionic support pad are fixedly connected to a locking block at their bottom. The top of the floating plate has a groove that matches the outline of the locking block, and the locking block is engaged in the groove.

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