Radiotherapy device, treatment head, housing device, and method for moving treatment head

Abstract

Disclosed are a radiotherapy device, a treatment head, a housing device, and a method for moving a treatment head. The housing device comprises a support assembly and a sheathe assembly. The support assembly comprises a fixed base, a movable bottom plate, and a movable support, wherein the movable bottom plate is arranged on the fixed base and can move in a telescopic direction of the support assembly, and the movable support is arranged on the movable bottom plate and can move in the telescopic direction of the support assembly. The sheathe assembly covers at least part of the support assembly and comprises three or more sheathes, and two of the sheathes can at least partially enter or leave the other sheathe in the telescopic direction of the support assembly along with the movable bottom plate and / or the movable support. The housing device is configured as rotationally movable with an outer frame and immovable with an inner frame. When the housing device contracts, the volume of the radiotherapy device is reduced, so as to reduce the risk that an operator or a patient collides with the radiotherapy device, reduce the oppressive feeling in the patient, and improve the experience of the patient.

Description

Radiotherapy equipment, treatment head, housing device and treatment head moving method

[0001] This application claims priority to Chinese Patent Application No. CN202311761422.6 filed on December 20, 2023, which is incorporated by reference in its entirety. Technical Field

[0002] The present application relates to the technical field of high-end medical equipment, for example, to radiotherapy equipment, a treatment head, a shell device and a method for moving the treatment head. Background Art

[0003] Cancer is a deadly disease that poses a significant threat to human health and life. Currently, the main treatments include surgery, radiotherapy, and chemotherapy. With the advancement of radiation biology, oncology, and medical computing, radiotherapy is playing an increasingly important role in cancer treatment.

[0004] The housing of the treatment head of related radiotherapy equipment utilizes a fixed, single-stage telescopic, or single-stage motion mechanism. Due to the limited range of motion, the housing must be large to accommodate equipment such as dose detection within the treatment head. This results in an excessively large overall volume of the treatment head, which inevitably takes up too much space within the treatment area. This increases the risk of collision with the treatment head for the operator or patient. Furthermore, the oversized treatment head can cause a sense of oppression for the patient during treatment.

[0005] Therefore, the related housing device needs to be further improved. Summary of the Invention

[0006] The purpose of this application is to provide radiotherapy equipment, a treatment head, a shell device and a method for moving the treatment head. When the shell device is extended, the radiotherapy equipment can reach a farther position, increasing the treatment range of the radiotherapy equipment. When the shell device is contracted, the volume of the radiotherapy equipment is reduced, which can increase the space of the radiotherapy area and reduce the risk of collision between the operator or patient and the radiotherapy equipment. At the same time, it also reduces the sense of oppression brought to the patient by the radiotherapy equipment, thereby improving the patient's experience.

[0007] The purpose of this application is achieved by the following technical solutions:

[0008] The present application provides a housing device for installation on an outer frame of a radiotherapy device and capable of passing through a C-shaped inner frame in a front-to-back direction, comprising:

[0009] A support assembly, the support assembly comprising a fixed base, a movable bottom plate, and a movable support, the movable bottom plate being used to mount an ionization chamber and being disposed on the fixed base and being movable along the extension and contraction direction of the support assembly, the movable support being disposed on the movable bottom plate and being movable along the extension and contraction direction of the support assembly, the movable support being used to mount a device for adjusting a particle beam;

[0010] a housing assembly, the housing assembly being disposed over at least a portion of the support assembly, the housing assembly being provided with a radiation beam outlet, and comprising three or more housings, wherein two of the housings are capable of at least partially entering or leaving another housing along the extension and retraction direction of the support assembly as the movable base plate and / or the movable support move;

[0011] The housing arrangement is arranged for rotational movement with the outer frame and does not move with the inner frame.

[0012] In a possible implementation, the housing device further includes a driving assembly, and the driving assembly is used to drive the movable base plate and the movable bracket to move along the extension and retraction direction of the bracket assembly.

[0013] In one possible implementation, the driving assembly includes a first gear and a second gear provided on the movable base, and a first rack provided on the fixed base and a second rack provided on the movable bracket, which are respectively engaged with the first gear and the second gear. The first gear and the first rack are used to drive the movable base to move along the telescopic direction of the bracket assembly, and the second gear and the second rack are used to drive the movable bracket to move along the telescopic direction of the bracket assembly.

[0014] In a possible implementation, the diameter of the second gear is greater than the diameter of the first gear, so that the moving speed of the movable bracket is greater than the moving speed of the movable base plate.

[0015] In a possible implementation, it further includes a fixing component, the bracket assembly is fixedly connected to the external frame through the fixing component, the bracket assembly is provided with a support frame, the shell assembly includes a first shell, a second shell and a third shell arranged in sequence along the extension and contraction direction of the bracket assembly, and the support frame is connected to the fixed base and the first shell.

[0016] In one possible implementation, the bracket assembly also includes a first sliding rail and a first slider that are slidably connected, and a second sliding rail and a second slider that are slidably connected, the first sliding rail and the first slider are used to slidably connect the movable base and the fixed base, and the second sliding rail and the second slider are used to slidably connect the movable base and the movable bracket.

[0017] In one possible implementation, the shell assembly includes a first shell, a second shell, and a third shell arranged in sequence along the extension and retraction direction of the bracket assembly, the third shell is located at the first end of the shell device facing the patient, the first shell is fixedly connected to the fixed base, the second shell is slidingly connected to the bracket assembly, and the third shell is fixedly connected to the mobile bracket. When the shell device contracts, the second shell is configured to be able to be smoothly retracted into the first shell, and the third shell is configured to be able to be smoothly retracted into the second shell.

[0018] In a possible implementation, the driving assembly further includes a third gear and a third rack disposed on the second housing and meshing with the third gear, and the third gear and the third rack are used to drive the movable bracket to move along the telescopic direction of the bracket assembly.

[0019] In a possible implementation, a diameter of the third gear is smaller than a diameter of the second gear, so that a moving speed of the movable bracket is greater than a moving speed of the second housing.

[0020] In a possible implementation, a pulley is provided on the movable bracket, and a guide rail slidably connected to the pulley is provided on the second shell, and the pulley and the guide rail are used to make the second shell move linearly along the extension and retraction direction of the bracket assembly.

[0021] In a possible implementation, a limiting portion is provided at the second end of the fixed base close to the outer frame, and the limiting portion is used to limit the distance that the movable base plate moves toward one side of the outer frame;

[0022] When the housing device is in a fully retracted state, the movable bracket is located on the first side of the movable base plate, and the movable base plate abuts against the limiting portion;

[0023] When the housing device is in a fully extended state, the movable bracket is located on the second side of the movable base plate.

[0024] A treatment head comprises a housing device as described above, a scanning magnet, an ionization chamber, and a range adjuster. The treatment head is mounted on an external frame and is configured to rotate together with the external frame. The treatment head is provided with cables, all of which are routed through the external frame.

[0025] A radiotherapy device includes the treatment head described above, an outer frame, and a C-shaped inner frame. The outer frame is a rotating frame, including a first arm and a second arm located on either side, and an intermediate arm connecting the first arm and the second arm. The intermediate arm is used to drive the shell device and the outer frame to rotate synchronously. A particle accelerator for providing a particle beam is installed on the intermediate arm.

[0026] A method for moving a treatment head, wherein the treatment head is the treatment head described above, the method comprising:

[0027] Setting the initial state of the treatment head at the initial position to be retracted to the final state along the front-back direction;

[0028] According to the predetermined position to be reached by the treatment head, the outer frame is rotated to drive the treatment head to rotate from the initial position to the first position, and then extend forward from the first position to the predetermined position;

[0029] After completing the particle beam irradiation at the predetermined position, the treatment head is retracted to the first position.

[0030] In a possible implementation, the method further includes: after retracting the treatment head to the first position, rotating the outer frame to return the treatment head to the initial position.

[0031] The radiotherapy device, treatment head, housing device, and treatment head movement method of the present application have at least the following advantages:

[0032] The radiotherapy equipment, treatment head, shell device and method for moving the treatment head of the present application, the shell device drives the outer shell component to move telescopically through the bracket component, that is, it can perform linear movement close to and away from the center of the radiotherapy equipment, thereby achieving the increase or decrease in the volume of the radiotherapy equipment. When the shell device is extended, the radiotherapy equipment can reach a farther position, increasing the treatment range of the radiotherapy equipment. When the shell device is contracted, the volume of the radiotherapy equipment is reduced, better realizing small-scale integration, and can increase the space of the radiotherapy area, reducing the risk of collision between the operator or patient and the radiotherapy equipment, while also reducing the sense of oppression brought to the patient by the radiotherapy equipment, improving the patient's experience, and providing sufficient working space around the top of the treatment bed. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] FIG1 is a schematic diagram of the three-dimensional structure of a housing device according to an embodiment of the present application.

[0034] FIG2 is a schematic structural diagram of the housing device according to an embodiment of the present application when it is fully extended.

[0035] FIG3 is a schematic structural diagram of the housing device according to an embodiment of the present application when it is fully retracted.

[0036] FIG4 is a structural diagram from one perspective of an embodiment of the present application when the housing assembly is not installed.

[0037] FIG5 is a partial enlarged view of point A in FIG4 .

[0038] FIG6 is a structural diagram from another perspective of an embodiment of the present application when the housing assembly is not installed.

[0039] FIG7 is a structural diagram of an outer frame and an inner frame from one perspective of an embodiment of the present application.

[0040] FIG8 is a structural diagram of the outer frame and the inner frame from another perspective of an embodiment of the present application.

[0041] In the figure: 100, housing device; 1, bracket assembly; 11, fixed base; 111, first slider; 112, waist-shaped hole; 113, circular hole; 114, second end; 12, movable bottom plate; 121, first slide rail; 122, second slide rail; 123, first side; 124, second side; 13, movable bracket; 131, second slider; 132, pulley; 133, guide rail; 14, support frame; 15, limiter; 16, first end; 2, housing assembly; 21, first housing; 22, Second housing; 23. Third housing; 231. Radiation beam outlet; 232. Grating blades; 3. Drive assembly; 31. First gear; 32. First rack; 33. Second gear; 34. Second rack; 35. Third gear; 36. Third rack; 37. Fourth gear; 38. Fifth gear; 4. Fixing assembly; 41. Screw; 42. Pin; 5. External frame connector; 200. External frame; 201. First arm; 202. Second arm; 203. Intermediate arm; 300. Internal frame. DETAILED DESCRIPTION

[0042] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Identical reference numerals in the figures represent identical or similar structures, and thus repeated descriptions thereof will be omitted.

[0043] The words expressing position and direction described in this application are all explained based on the accompanying drawings as examples, but can be changed as needed, and all changes are included in the scope of protection of this application.

[0044] Referring to Figures 1 to 8, Figure 1 is a schematic diagram of the three-dimensional structure of the shell device of an embodiment of the present application, Figure 2 is a schematic diagram of the structure of the shell device of an embodiment of the present application when fully extended, Figure 3 is a schematic diagram of the structure of the shell device of an embodiment of the present application when fully retracted, Figure 4 is a schematic diagram of the structure of the embodiment of the present application from one perspective when the outer shell component is not installed, Figure 5 is a partial enlarged view of point A in Figure 4, Figure 6 is a schematic diagram of the structure of the embodiment of the present application from another perspective when the outer shell component is not installed, and Figure 7 is a schematic diagram of the structure of the outer frame and the inner frame of an embodiment of the present application from one perspective. Figure 8 is a schematic diagram of the structure of the outer frame and the inner frame of an embodiment of the present application from another perspective. The present application provides a shell device 100 for installation on the outer frame 200 of a radiotherapy device and capable of passing through a C-shaped inner frame 300 in the front-to-back direction, comprising: a bracket assembly 1 and an outer shell assembly 2.

[0045] In some possible embodiments, referring to Figures 4 to 6, the support assembly 1 includes a fixed base 11, a movable base plate 12 and a movable support 13. The movable base plate 12 is used to install an ionization chamber (not shown) and is arranged on the fixed base 11 and can move along the extension and contraction direction of the support assembly 1. The movable support 13 is arranged on the movable base plate 12 and can move along the extension and contraction direction of the support assembly 1, that is, the front-to-back direction. The movable support 13 is used to install equipment for adjusting the particle beam, such as an adaptive grating (AA) or range shifter (RS) for the proton beam. An ionization chamber (not shown) is also provided behind the mobile support 13. The ionization chamber is used to monitor components that provide proton dose size and beam spot position information. The support assembly 1 adopts a double-layer motion structure, which allows the support assembly 1 to have a larger contraction stroke, that is, the support assembly 1 can reach a farther position when it is extended in the front-to-back direction, that is, the length direction of the fixed base 11, and the overall size of the support assembly 1 can be reduced when the support assembly 1 is contracted. Compared to the primary motion structure, when the stent assembly 1 of the present application is fully retracted, the stent assembly 1 is smaller, freeing up more space. When the stent assembly 1 is fully extended, the stent assembly 1 can reach a farther position, that is, a larger treatment range can be achieved. The aforementioned retracting direction is the front-to-back direction. For example, when the mobile support 13 is extended, it moves forward to move closer to the patient, and when the mobile support 13 is retracted, it moves backward away from the patient.

[0046] In some possible embodiments, the movable base plate 12 is arranged above the fixed base 11, and the movable bracket 13 is arranged above the movable base plate 12. When the bracket assembly 1 is fully extended, part of the movable base plate 12 extends to the right and can protrude from the fixed base 11, that is, part of the movable base plate 12 extends to the side close to the patient and can protrude from the fixed base 11, and the mobile bracket 13 is on the right side of the movable base plate 12 and can protrude from the movable base plate 12, that is, the mobile bracket 13 is on the side of the mobile base plate 12 close to the patient and can protrude from the movable base plate 12. When the bracket assembly 1 is fully retracted, the movable base plate 12 retracts to the left, that is, the movable base plate 12 retracts to the side away from the patient, and the right side of the movable base plate 12 is basically flush with the right side of the fixed base 11 or retracted to the right side of the fixed base 11. The movable bracket 13 is on the left side of the movable base plate 12, that is, the movable bracket 13 is on the side of the movable base plate 12 away from the patient, and the right side of the therapeutic device installed on the mobile bracket 13 is basically flush with the right side of the fixed base 11 or retracted to the right side of the fixed base 11.

[0047] With reference to Figures 1, 2, and 4, the housing assembly 2 is disposed over at least a portion of the support assembly 1. The housing assembly 2 is provided with a radiation beam outlet 231. The housing assembly 2 may include three or more housings, two of which are capable of at least partially entering or leaving another housing along the telescopic direction of the support assembly 1 as the movable base plate 12 and / or the movable support 13 move. In this embodiment, the housing assembly 2 may include a first housing 21, a second housing 22, and a third housing 23 sequentially disposed along the telescopic direction of the support assembly 1. The third housing 23 is located at the first end 16 of the housing device 100 facing the patient and is used to accommodate an adaptive grating and a range adjuster for regulating the proton beam. A radiation beam outlet 231 is provided at one end of the third housing 23 facing the patient. The radiation beam is emitted through the radiation beam outlet 231 and reaches the affected area of ​​the patient. The radiation beam (particle beam) may be a proton beam.

[0048] The direction from left to right in Figure 1 is from back to front. A grating blade 232 can be set behind the radiation beam outlet 231. The grating blade 232 is composed of many narrow metal plates. These metal plates can be moved at small intervals and precise positions to control the shape and intensity of the focused radiation beam to achieve a therapeutic effect. Traditional grating blades 232 usually need to be adjusted manually, while adaptive grating blades 232 can automatically monitor and adjust the dose distribution and position during radiotherapy. In this embodiment, the grating blades 232 are adaptive grating blades. The adaptive grating blades are integrated with the radiotherapy planning system and the image guidance system to monitor changes in the tumor and surrounding tissue in real time and adjust the adaptive grating blades. The adaptive grating blades help reduce errors and improve treatment accuracy. At the same time, they can also reduce the number and dose of radiotherapy that patients need to receive, and reduce the risk of side effects and complications of radiotherapy to patients.

[0049] Referring to Figures 2 and 3 , the opening of the first housing 21 is larger than the size of the second housing 22, meaning that the second housing 22 can at least partially enter or exit the first housing 21 along the direction of extension and retraction of the stand assembly 1. The second housing 22 is used to accommodate the mobile stand 13. The opening of the second housing 22 is larger than the size of the third housing 23, meaning that the third housing 23 can at least partially enter or exit the second housing 22 along the direction of extension and retraction of the stand assembly 1. In other words, at least portions of the second housing 22 and the third housing 23 can be retracted into the first housing 21, thereby reducing the overall volume of the housing assembly 2. In some possible embodiments, the length of the first housing 21 in the direction of extension and retraction of the stand assembly 1 is greater than or equal to the length of the second housing 22 in the direction of extension and retraction of the stand assembly 1, and the length of the first housing 21 in the direction of extension and retraction of the stand assembly 1 is greater than or equal to the length of the second housing 22 in the direction of extension and retraction of the stand assembly 1. In this way, the second housing 22 and the third housing 23 can be fully retracted into the first housing 21, so that the end surfaces of the first, second, and third housings 21, 22, and 23 on the side closest to the patient are substantially flush, further reducing the overall volume of the housing assembly 2, and thereby the overall volume of the housing device 100.

[0050] In some possible embodiments, referring to Figure 2, when the shell device 100 is fully extended, at least a portion of the end of the second shell 22 close to the first shell 21 is in the first shell 21, and at least a portion of the end of the third shell 23 close to the second shell 22 is in the second shell 22. This ensures that the therapeutic equipment in the shell assembly 2 will not be exposed, avoiding the entry of foreign matter such as dust. At the same time, it can also prevent the first shell 21, the second shell 22 and the third shell 23 from detaching from each other, ensuring that when the shell device 100 is contracted, the second shell 22 can smoothly enter the first shell 21, and the third shell 23 can smoothly enter the second shell 22.

[0051] In some possible embodiments, the first housing 21 is fixedly connected to the fixed base 11, in some possible embodiments, the second housing 22 is slidably connected to the movable base 12, and in some possible embodiments, the third housing 23 is fixedly connected to the movable bracket 13. When the bracket assembly 1 is telescopic, the second housing 22 and the third housing 23 can contract and move along with the bracket assembly 1, that is, the second housing 22 can move along the telescopic direction of the bracket assembly 1 with the movable base 12, and the third housing 23 can move along the telescopic direction of the bracket assembly 1 with the movable base 13. In this way, the shell device 100 drives the outer shell component 2 to extend and retract together through the bracket component 1, that is, it can perform linear movement close to or away from the center of the radiotherapy equipment, thereby achieving the expansion or reduction of the volume of the radiotherapy equipment. The radiotherapy equipment is, for example, a treatment head. When the shell device 100 is extended, the radiotherapy equipment can reach a farther position, increasing the treatment range of the radiotherapy equipment. When the shell device 100 is contracted, the volume of the radiotherapy equipment is reduced, better realizing small-scale integration, and can increase the space of the radiotherapy area, reducing the risk of collision between the operator or patient and the radiotherapy equipment, while also reducing the sense of oppression brought to the patient by the radiotherapy equipment, improving the patient's experience, and providing sufficient working space around the top of the treatment bed.

[0052] In some possible embodiments, referring to Figures 4 to 6, the housing device 100 may further include a drive assembly 3, which is used to drive the movable base plate 12 and the movable bracket 13 to move along the extension and retraction direction of the bracket assembly 1, that is, the drive assembly 3 can drive the bracket assembly 1 to retract and retract. The drive assembly 3 may include a motor (not shown) that can accurately move the radiotherapy device to a predetermined position for radiotherapy and accurately reduce the size of the radiotherapy device to increase the space in the treatment area.

[0053] In some possible embodiments, referring to Figures 4 to 6, the driving assembly 3 may further include a first gear 31 and a second gear 33 provided on the movable base plate 12, and a first rack 32 provided on the fixed base 11 and a second rack 34 provided on the movable bracket 13, which are respectively engaged with the first gear 31 and the second gear 33. The first gear 31 and the first rack 32 are used to drive the movable base plate 12 to move along the extension and retraction direction of the bracket assembly 1, and the second gear 33 and the second rack 34 are used to drive the movable bracket 13 to move along the extension and retraction direction of the bracket assembly 1. In some possible embodiments, the first gear 31 and the second gear 33 are coaxially arranged, and the first gear 31 and the second gear 33 are connected to a motor. One motor can drive the first gear 31 and the second gear 33 to rotate simultaneously, which can reduce the number of motors. On the one hand, it can reduce the space occupied by the motor, thereby reducing the volume of the housing assembly 2 and the volume of the radiotherapy equipment. On the other hand, reducing the number of motors can reduce the manufacturing cost of the radiotherapy equipment.

[0054] The diameter of the second gear 33 is greater than that of the first gear 31 so that the moving speed of the movable bracket 13 is greater than that of the movable base plate 12. When the first gear 31 and the second gear 33 are coaxially arranged, that is, the first gear 31 and the second gear 33 rotate at the same angular velocity, the distance that the movable bracket 13 needs to move to drive the third housing 23 is greater than the distance that the movable base plate 12 needs to move. Therefore, the diameter of the second gear 33 is greater than that of the first gear 31. The diameters of the second gear 33 and the first gear 31 can be set according to actual needs so that the movable bracket 13 and the movable base plate 12 can reach their respective predetermined positions simultaneously when the housing device 100 is retracted.

[0055] Referring to Figures 4 to 6, the bracket assembly 1 can also include a first slide rail 121 and a first slider 111 that are slidably connected, and a second slide rail 122 and a second slider 131 that are slidably connected. The first slide rail 121 and the first slider 111 are used to make the movable base plate 12 and the fixed base 11 slidably connected, so that the movement between the movable base plate 12 and the fixed base 11 is smoother. The second slide rail 122 and the second slider 131 are used to make the movable base plate 12 and the movable bracket 13 slidably connected, so that the movement between the movable base plate 12 and the movable bracket 13 is smoother.

[0056] The number of the first slide rails 121 and the first slider 111 can be multiple, so as to make the connection between the movable base plate 12 and the fixed base 11 more stable, and ensure that the movement between the movable base plate 12 and the fixed base 11 is smoother. The first slide rail 121 is set on the movable base plate 12, and the first slider 111 is set on the fixed base 11, or the first slide rail 121 is set on the fixed base 11, and the first slider 111 is set on the movable base plate 12. In this embodiment, the number of the first slide rails 121 is two, and the two first slide rails 121 extend along the telescopic direction of the bracket assembly 1, and the number of the first sliders 111 is four, and the two first slide rails 121 are respectively set on both sides of the side of the movable base plate 12 facing the fixed base 11, and the four first sliders 111 are respectively set at the four corners of the fixed base 11.

[0057] The number of the second slide rails 122 and the second slider 131 can be multiple, so as to make the connection between the movable base plate 12 and the movable bracket 13 more stable, and ensure that the movement between the movable base plate 12 and the movable bracket 13 is smoother. The second slide rail 122 is set on the movable base plate 12, and the second slider 131 is set on the movable bracket 13, or the second slide rail 122 is set on the movable bracket 13, and the second slider 131 is set on the movable base plate 12. In this embodiment, the number of the second slide rails 122 is two, and the two second slide rails 122 extend along the telescopic direction of the bracket assembly 1, and the number of the second slider 131 is four, and the two second slide rails 122 are respectively set on both sides of the side of the movable base plate 12 facing the movable bracket 13, and the four second sliders 131 are respectively set at the four corners of the movable bracket 13.

[0058] The bracket assembly 1 can also include a support frame 14, which is connected to the fixed base 11 and the first shell 21. On the one hand, it can improve the structural strength of the fixed base 11, and on the other hand, it can provide more stable support for the first shell 21, ensuring the structural strength of the first shell 21, thereby improving the overall structural strength of the shell device 100.

[0059] 6, 7 and 8, a limiting portion 15 is provided at the second end 114 of the fixed base 11 close to the outer frame 200. The limiting portion 15 is used to limit the distance that the movable base plate 12 moves toward one side of the outer frame 200.

[0060] When the housing device 100 is in the fully retracted state, the movable bracket 13 is located on the first side 123 of the movable base plate 12 , that is, the movable bracket 13 is located on the leftmost side of the movable base plate 12 , and the movable base plate 12 abuts against the limiting portion 15 ;

[0061] When the housing device 100 is in the fully extended state, the movable bracket 13 is located at the second side 124 of the movable base plate 12 , that is, the movable bracket 13 is located at the rightmost side of the movable base plate 12 .

[0062] 6, 7, and 8, the housing device 100 may further include a fixing assembly 4, through which the bracket assembly 1 is fixedly connected to the outer frame connector 5. The outer frame 200 (rotating frame) includes a first arm 201 and a second arm 202 located on both sides, and an intermediate arm 203 connecting the first arm 201 and the second arm 202. The intermediate arm 203 is used to drive the housing device 100 and the outer frame 200 to move synchronously. A particle accelerator for providing a particle beam is mounted on the intermediate arm 203. In some possible embodiments, the fixing assembly 4 may include a screw 41 and a pin 42. The pin 42 is used to position the fixing assembly 4 and the outer frame connector 5 to facilitate installation and removal between the fixing assembly 4 and the outer frame connector 5. The screw 41 is used to secure the fixing assembly 4 to the outer frame connector 5. The fixed base 11 and the outer frame connecting piece 5 can also be provided with a waist-shaped hole 112 and a circular hole 113. The waist-shaped hole 112 facilitates fine-tuning of the position between the fixed base 11 and the outer frame connecting piece 5, which can eliminate processing errors between parts and improve the installation accuracy between the fixed base 11 and the outer frame connecting piece 5.

[0063] In previous equipment, the housing device 100 was set on the C-shaped track of the C-shaped inner frame 300 and driven by a motor. The housing device 100 and the outer frame 200 moved separately, so there was always a time difference between the movement of the housing device 100 and the outer frame 200, and the inner frame 300 required a separate cable system. Compared with setting the housing device 100 on the C-shaped track of the inner frame 300, directly fixing the housing device 100 on the outer frame 200 allows the housing device 100 to rotate with the rotation of the outer frame 200, avoiding the time difference between the movement of the housing device 100 and the movement of the outer frame 200. It also makes the structure of the housing device 100 simpler, and the cable drag chain originally on the inner frame 300 can be eliminated. All cables on the housing device 100 run through the outer frame 200, integrating and optimizing the entire wiring structure, which can greatly reduce debugging and production costs. The C-shaped guide rail on the C-shaped inner frame 300 has been eliminated, which makes the structure of the inner frame 300 very simple and reduces a lot of debugging costs. Furthermore, the cable drag chain originally on the inner frame 300 has been eliminated, and all cables on the treatment head are routed through the outer frame 200, integrating and optimizing the entire routing structure, thus greatly reducing debugging and production costs.

[0064] In some possible embodiments, referring to Figures 4 to 6, the drive assembly 3 may further include a third gear 35 and a third rack 36 disposed on the second housing 22 and meshing with the third gear 35. The third gear 35 and the third rack 36 are used to drive the movable bracket 13 to move along the extension and retraction direction of the bracket assembly 1. The third gear 35 can be driven directly by the motor or indirectly through the first gear 31 or the second gear 33. In this embodiment, the third gear 35 is driven by the meshing second gear 33, the fourth gear 37, and the fifth gear 38, so that the rotation direction of the third gear 35 is consistent with the rotation direction of the first gear 31 and the second gear 33. In some possible embodiments, the third gear 35 and the fifth gear 28 are coaxially arranged, that is, the third gear 35 rotates with the fifth gear 38. In some possible embodiments, the second gear 33, the fourth gear 37 and the fifth gear 38 are gears of the same specifications, and the second gear 33, the fourth gear 37 and the fifth gear 38 are distributed in a straight line along the extension and retraction direction of the bracket assembly 1. This can avoid interference between the third rack 36 and the second gear 33, the fourth gear 37 and the fifth gear 38 during movement.

[0065] Since the distance that the mobile bracket 13 needs to move is greater than the distance that the second shell 22 needs to move, the diameter of the third gear 35 is smaller than the diameter of the second gear 33, so that the moving speed of the mobile bracket 13 is greater than the moving speed of the second shell 22. The diameter of the second gear 33 and the diameter of the third gear 35 can be set according to actual needs to ensure that the mobile bracket 13 and the second shell 22 can reach their respective predetermined positions at the same time when the shell device 100 is retracted.

[0066] The movable bracket 13 may be provided with a pulley 132, and the second housing 22 may be provided with a guide rail 133 slidably connected to the pulley 132. The pulley 132 and the guide rail 133 are used to cause the second housing 22 to perform linear motion along the extension and retraction direction of the bracket assembly 1. In some possible embodiments, there are multiple pulleys 132, for example, four pulleys 132, and the four pulleys 132 are distributed in a quadrilateral. Two pulleys 132 are provided on each side of the guide rail 133. The four pulleys 132 can constrain the guide rail 133 to perform linear motion along the extension and retraction direction of the bracket assembly 1, thereby ensuring that the second housing 22 performs linear motion along the extension and retraction direction of the bracket assembly 1. The pulley 132 and the guide rail 133 also support the second housing 22, thereby improving the stability of the second housing 22 and preventing the second housing 22 from shaking during movement.

[0067] The present application also provides a treatment head, including the above-mentioned shell device 100, scanning magnet, ionization chamber, and range adjuster. The treatment head is installed on the outer frame 200 and rotates together with the outer frame 200. The treatment head is provided with cables, and all the cables are wired through the outer frame 200. That is, the cables on the treatment head are not set on the inner frame 300.

[0068] The present application also provides a radiotherapy device, comprising the above-mentioned treatment head, an outer gantry 200, a C-shaped inner gantry 300, and a particle accelerator mounted on the outer gantry 200. In some possible embodiments, the radiotherapy device is used for proton radiotherapy.

[0069] During treatment, the treatment head rotates in conjunction with the outer frame 200. In previous devices, the treatment head was fixed to a C-shaped track on the inner frame 300. The treatment head and the outer frame 200 moved independently, resulting in a time lag between the treatment head and the outer frame 200, and the inner frame 300 required a separate cabling system. To simplify the frame design, a design update was made to directly attach the treatment head to the outer frame 200. This ensures synchronized movement between the treatment head and the outer frame 200, and significantly reduces cabling.

[0070] The use of a dual-layer bracket, comprising a movable base plate 12 and a movable support 13, allows for a wider extension range, bringing the radiation beam outlet 231 of the treatment head closer to the isocenter. For treatment rooms utilizing a C-frame, the dual-layer extension bracket allows the treatment head to be directly connected to the external gantry 200, eliminating the control motor on the C-frame. This fundamentally addresses the error and synchronization control issues associated with the movement of the external gantry 200 and the treatment head on the C-frame in related technologies. The external gantry 200 rotates synchronously with the treatment head, reducing latency and positional deviations.

[0071] The present application also provides a method for moving a treatment head, wherein the treatment head is the treatment head described above, and the method comprises:

[0072] Setting the initial state of the treatment head at the initial position to be retracted to the final state along the front-back direction;

[0073] According to the predetermined position to be reached by the treatment head, the outer frame 200 is rotated to drive the treatment head to rotate from the initial position to the first position, and then extend forward from the first position to reach the predetermined position;

[0074] After completing the particle beam irradiation at the predetermined position, the treatment head is retracted to the first position.

[0075] In some possible embodiments, the method further includes: after retracting the treatment head to the first position, rotating the outer frame 200 to return the treatment head to the initial position.

[0076] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limiting the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the application without departing from the principles and purpose of the present application. All of these changes should fall within the scope of protection of the claims of the present application.

Claims

1. A housing device, which is used to be mounted on an outer frame of a radiotherapy device and can pass through a C-shaped inner frame in a front-to-back direction, comprising: A support assembly, the support assembly comprising a fixed base, a movable bottom plate and a movable support, the movable bottom plate is used to install an ionization chamber and is arranged on the fixed base and can move along the extension direction of the support assembly, the movable support is arranged on the movable bottom plate and can move along the extension direction of the support assembly, and the movable support is used to install a device for adjusting a particle beam; A shell assembly, the shell assembly is arranged outside at least a part of the support assembly, the shell assembly is provided with a radiation beam outlet, and includes three or more shells, wherein two of the shells can at least partially enter or leave another shell along the extension direction of the support assembly along with the movable base plate and / or the movable support; The housing means is arranged for rotational movement with the outer frame and does not move with the inner frame.

2. The housing device according to claim 1, wherein: The housing device further comprises a driving assembly, and the driving assembly is used to drive the movable base plate and the movable bracket to move along the telescopic direction of the bracket assembly.

3. The housing device according to claim 2, wherein: The driving assembly includes a first gear and a second gear arranged on the movable base, and a first rack arranged on the fixed base and a second rack arranged on the movable bracket, which are respectively meshed with the first gear and the second gear. The first gear and the first rack are used to drive the movable base to move along the telescopic direction of the bracket assembly, and the second gear and the second rack are used to drive the movable bracket to move along the telescopic direction of the bracket assembly.

4. The housing device according to claim 3, wherein: The diameter of the second gear is greater than the diameter of the first gear, so that the moving speed of the moving bracket is greater than the moving speed of the moving base plate.

5. The housing device according to claim 1, wherein: It also includes a fixing component, through which the bracket component is fixedly connected to the external frame, the bracket component is provided with a support frame, the shell component includes a first shell, a second shell and a third shell arranged in sequence along the telescopic direction of the bracket assembly, and the support frame is connected to the fixed base and the first shell.

6. The housing device according to claim 1, wherein: The bracket assembly also includes a first slide rail and a first slider that are slidably connected, and a second slide rail and a second slider that are slidably connected. The first slide rail and the first slider are used to slidably connect the movable base plate and the fixed base, and the second slide rail and the second slider are used to slidably connect the movable base plate and the movable bracket.

7. The housing device according to claim 3, wherein: The shell assembly includes a first shell, a second shell and a third shell which are arranged in sequence along the extension and retraction direction of the bracket assembly. The third shell is located at the first end of the shell device facing the patient. The first shell is fixedly connected to the fixed base, the second shell is slidably connected to the bracket assembly, and the third shell is fixedly connected to the movable bracket. When the shell device is retracted, the second shell is arranged to be able to be smoothly retracted into the first shell, and the third shell is arranged to be able to be smoothly retracted into the second shell.

8. The housing device according to claim 7, wherein: The driving assembly further includes a third gear and a third rack meshing with the third gear and arranged on the second housing, and the third gear and the third rack are used to drive the movable bracket to move along the telescopic direction of the bracket assembly.

9. The housing device according to claim 8, wherein: The diameter of the third gear is smaller than the diameter of the second gear, so that the moving speed of the moving bracket is greater than the moving speed of the second housing.

10. The housing device according to claim 7, wherein: The movable bracket is provided with a pulley, and the second shell is provided with a guide rail slidably connected to the pulley, and the pulley and the guide rail are used to make the second shell perform linear motion along the telescopic direction of the bracket assembly.

11. The housing device according to claim 7, wherein: The fixed base is provided with a limiting portion at the second end close to the outer frame, and the limiting portion is used to limit the distance that the movable bottom plate moves toward one side of the outer frame; When the housing device is in a fully retracted state, the movable bracket is located on a first side of the movable bottom plate, and the movable bottom plate abuts against the limiting portion; When the housing device is in a fully extended state, the movable bracket is located on the second side of the movable base plate.

12. A treatment head, comprising the shell device, scanning magnet, ionization chamber, and range adjuster according to any one of claims 1 to 11, wherein the treatment head is mounted on an external frame and is used to rotate together with the external frame, and the treatment head is provided with cables, and all of the cables are wired through the external frame.

13. A radiotherapy device, comprising the treatment head as claimed in claim 12, an external frame, and a C-shaped internal frame, wherein the external frame is a rotating frame, comprising a first arm and a second arm located on both sides and an intermediate arm connecting the first arm and the second arm, the intermediate arm is used to drive the shell device and the external frame to rotate synchronously, and a particle accelerator for providing a particle beam is installed on the intermediate arm.

14. A method for moving a treatment head, the treatment head being the treatment head according to claim 12, the method comprising: The initial state of the treatment head at the initial position is set to be a state in which the treatment head is retracted to the final state along the front-back direction; According to the predetermined position to be reached by the treatment head, the outer frame is rotated to drive the treatment head to rotate from the initial position to the first position, and then extend forward from the first position to the predetermined position; After completing the particle beam irradiation at the predetermined position, the treatment head is retracted to the first position.

15. The method for moving a treatment head according to claim 14, wherein: The method further comprises: after retracting the treatment head to the first position, rotating the outer frame to return the treatment head to the initial position.

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