Radiotherapy equipment, treatment head, shell device and movement method of treatment head

Abstract

The invention discloses radiotherapy equipment, a treatment head, a shell device and a moving method of the treatment head. The shell device comprises a support assembly and a shell assembly. The support assembly comprises a fixed base, a movable bottom plate and a movable support, the movable bottom plate is arranged on the fixed base and can move in the 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 shell assembly covers at least part of the support assembly and comprises at least three shells, and two of the shells can at least partially enter or leave the other shell along with the movable bottom plate and / or the movable support in the telescopic direction of the support assembly. The housing arrangement is provided for rotational movement with the outer frame and not with the inner frame. When the shell device is contracted, the size of the radiotherapy equipment is reduced, the risk that an operator or a patient collides with the radiotherapy equipment is reduced, meanwhile, the oppression feeling brought by the radiotherapy equipment to the patient is reduced, and the experience effect of the patient is improved.

Description

[0001] This application is a divisional application of the original application with application number CN202311761422.6 (the application date is December 20, 2023, and the name of the invention is radiotherapy equipment, treatment head, shell device and method for moving the treatment head). Technical Field

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

[0003] Tumors are fatal diseases faced by humans, causing great harm to human life and health. Currently, the main treatment methods include surgery, radiotherapy, chemotherapy, etc. With the development of radiation biology, oncology and medical computers, the status of radiotherapy in tumor treatment is also increasing.

[0004] The shell device of the treatment head of the existing radiotherapy equipment adopts a fixed, one-stage telescopic or one-stage motion mechanism. Due to the limitation of the range of motion, in order to carry the dose detection equipment in the treatment head, the size of the shell device needs to be very large, resulting in the overall volume of the treatment head being too large, which will inevitably occupy too much space in the treatment area, thereby bringing a greater risk of collision with the treatment head to the operator or patient. At the same time, the oversized treatment head will give the patient a sense of oppression during the treatment process.

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

[0006] The object of the present invention is to provide a radiotherapy device, a treatment head, a shell device and a method for moving the treatment head. When the shell device is extended, the radiotherapy device can reach a farther position, thereby increasing the treatment range of the radiotherapy device. When the shell device is contracted, the volume of the radiotherapy device 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 device. At the same time, it also reduces the sense of oppression brought to the patient by the radiotherapy device and improves the patient's experience.

[0007] The purpose of the present invention is achieved by the following technical solutions:

[0008] 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, comprises:

[0009] 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;

[0010] A housing assembly, the housing assembly is disposed outside at least a portion of the support assembly, the housing assembly is provided with a radiation beam outlet, and includes at least three housings, wherein two of the housings can at least partially enter or leave another housing along the extension direction of the support assembly along with the movable base plate and / or the movable support;

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

[0012] Preferably, 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 extension and retraction direction of the bracket assembly.

[0013] Preferably, 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.

[0014] Preferably, 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] Preferably, it also includes a fixing component, and the bracket component is fixedly connected to the external frame through the fixing component. 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.

[0016] Preferably, 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 make the movable base plate and the fixed base slidably connected, and the second slide rail and the second slider are used to make the movable base plate and the movable bracket slidably connected.

[0017] Preferably, 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 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 mobile 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.

[0018] Preferably, the driving assembly further comprises 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.

[0019] Preferably, 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.

[0020] Preferably, 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 perform linear motion along the telescopic direction of the bracket assembly.

[0021] Preferably, a limiting portion is provided at one end of the fixed base 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;

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

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

[0024] A treatment head comprises a housing device, a scanning magnet, an ionization chamber, and a range adjuster as described in any one of the above, 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 the cables are wired through the external frame.

[0025] A radiotherapy device comprises the treatment head as described above, an outer frame, and a C-shaped inner frame, wherein the outer frame is a rotating frame, comprising arms located on both sides and an intermediate arm connecting the two arms, the intermediate arm is used to drive the shell device and the outer frame to rotate synchronously, and 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 as described above, and the method comprises:

[0027] 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;

[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] Preferably, 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.

[0031] Compared with the prior art, the beneficial effects of the present invention include at least:

[0032] The radiotherapy equipment, treatment head, shell device and method for moving the treatment head of the present invention are characterized in that the shell device drives the outer shell component to telescope together 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 of 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, and small-scale integration is better achieved. The space of the radiotherapy area can be increased, and the risk of collision between the operator or the patient and the radiotherapy equipment is reduced. At the same time, the sense of oppression brought to the patient by the radiotherapy equipment is also reduced, and the patient's experience effect is improved, and sufficient working space is provided around the top of the treatment bed. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of the housing device according to an embodiment of the present invention.

[0034] Figure 2 It is a schematic structural diagram of the housing device of the embodiment of the present invention when it is fully extended.

[0035] Figure 3 It is a schematic structural diagram of the housing device of the embodiment of the present invention when it is fully retracted.

[0036] Figure 4 It is a structural schematic diagram from a viewing angle of an embodiment of the present invention when the housing component is not installed.

[0037] Figure 5 yes Figure 4 A partial enlarged view of point A in the middle.

[0038] Figure 6 It is a structural schematic diagram from another perspective when the housing assembly is not installed in the embodiment of the present invention.

[0039] Figure 7 It is a schematic structural diagram of an outer frame and an inner frame of an embodiment of the present invention.

[0040] In the figure: 100, housing device; 1, bracket assembly; 11, fixed base; 111, first slider; 112, waist-shaped hole; 113, circular hole; 12, movable bottom plate; 121, first slide rail; 122, second slide rail; 13, movable bracket; 131, second slider; 132, pulley; 133, guide rail; 14, support frame; 15, limiter; 2, housing assembly; 21, first housing; 22, second housing; 23, third Shell; 231, radiation beam outlet; 232, grating blades; 3, driving 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, outer frame connecting part; 200, outer frame; 201, arm; 202, middle arm; 300, inner frame. DETAILED DESCRIPTION

[0041] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0042] The words expressing positions and directions described in the present invention are all explained with reference to the accompanying drawings as examples, but they can be changed as needed, and all such changes are included in the protection scope of the present invention.

[0043] refer to Figures 1 to 7 The present invention provides a shell device 100, which is used to be installed on an outer frame 200 of a radiotherapy device and can pass through a C-shaped inner frame 300 in a front-to-back direction, and includes: a bracket component 1 and an outer shell component 2.

[0044] Specifically, refer to Figures 4 to 6The support assembly 1 includes a fixed base 11, a movable bottom plate 12 and a movable support 13. The movable bottom 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 direction of the support assembly 1. The movable support 13 is arranged on the movable bottom plate 12 and can move along the extension direction of the support assembly 1, that is, the front-to-back direction. The movable support 13 is used to install a device for adjusting the particle beam, such as an adaptive aperture (AA) or a range shifter (RS) of a proton beam. An ionization chamber (not shown) is also arranged behind the mobile support 13. The ionization chamber is used to monitor the components that provide proton dose size and beam spot position information. The support assembly 1 adopts a double-layer motion structure, so that the support assembly 1 has a larger contraction stroke, that is, the support assembly 1 can reach a farther position when it is extended along 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 with the primary motion structure, when the support assembly 1 of the present invention is fully retracted, the volume of the support assembly 1 is smaller, and more space can be released. When the support assembly 1 is fully extended, the support assembly 1 can reach a farther position, that is, a larger treatment range can be achieved. The aforementioned telescopic 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.

[0045] In this embodiment, the mobile base plate 12 is arranged above the fixed base 11, and the mobile bracket 13 is arranged above the mobile base plate 12. When the bracket assembly 1 is fully extended, part of the mobile base plate 12 extends to the right and can protrude from the fixed base 11, that is, part of the mobile 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 mobile base plate 12 and can protrude from the mobile 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 mobile base plate 12. When the bracket assembly 1 is fully retracted, the mobile base plate 12 is retracted to the left, that is, the mobile base plate 12 is retracted to the side away from the patient, the right side of the mobile base plate 12 is substantially flush with the right side of the fixed base 11 or retracted to the right side of the fixed base 11, the mobile bracket 13 is on the left side of the mobile base plate 12, that is, the mobile bracket 13 is on the side of the mobile base plate 12 away from the patient, and the right side of the treatment device installed on the mobile bracket 13 is substantially flush with the right side of the fixed base 11 or retracted to the right side of the fixed base 11.

[0046] refer to Figure 1 , Figure 2The housing assembly 2 is covered at least partially outside the support assembly 1. The housing assembly 2 is provided with a radiation beam outlet 231. The housing assembly 2 may include at least three housings, two of which can at least partially enter or leave 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 arranged along the telescopic direction of the support assembly 1. The third housing 23 is located at the end of the shell device 100 facing the patient, and is used to accommodate an adaptive grating and a range adjuster for adjusting the proton beam. A radiation beam outlet 231 is provided at the end of the third housing 23 facing the patient. The radiation beam is emitted through the radiation beam outlet 231 and reaches the affected part of the patient. The radiation beam (particle beam) may be a proton beam.

[0047] Figure 1 The direction from left to right in the figure is the direction from back to front. A grating blade 232 may be provided 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 the 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 the changes of the tumor and surrounding tissues 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.

[0048] refer to Figure 2 , Figure 3, the opening of the first housing 21 is larger than the size of the second housing 22, that is, the second housing 22 can at least partially enter or leave the first housing 21 along the telescopic direction of the bracket assembly 1. The second housing 22 is used to accommodate the mobile bracket 13, and the opening of the second housing 22 is larger than the size of the third housing 23, that is, the third housing 23 can at least partially enter or leave the second housing 22 along the telescopic direction of the bracket assembly 1. In other words, at least part of the second housing 22 and the third housing 23 can be retracted into the first housing 21 to reduce the overall volume of the housing assembly 2. As a preferred embodiment, the length of the first housing 21 in the telescopic direction of the bracket assembly 1 is greater than or equal to the length of the second housing 22 in the telescopic direction of the bracket assembly 1, and the length of the first housing 21 in the telescopic direction of the bracket assembly 1 is greater than or equal to the length of the second housing 22 in the telescopic direction of the bracket assembly 1, so that the second housing 22 and the third housing 23 can be completely retracted into the first housing 21, so that the end surfaces of the first housing 21, the second housing 22 and the third housing 23 close to the patient are substantially flush, further reducing the overall volume of the housing assembly 2, and thus reducing the overall volume of the housing device 100.

[0049] As a preferred method, refer to Figure 2 When the shell device 100 is fully extended, at least a portion of one end of the second shell 22 close to the first shell 21 is in the first shell 21, and at least a portion of one 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, and avoids 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 the second shell 22 can smoothly enter the first shell 21, and the third shell 23 can smoothly enter the second shell 22 when the shell device 100 is contracted.

[0050] The first housing 21 is preferably fixedly connected to the fixed base 11, the second housing 22 is preferably slidably connected to the movable bottom plate 12, and the third housing 23 is preferably fixedly connected to the movable bracket 13. When the bracket assembly 1 moves in telescopic motion, the second housing 22 and the third housing 23 can move together 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 bottom plate 12, and the third housing 23 can move along the telescopic direction of the bracket assembly 1 with the movable bracket 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, and small-scale integration is better achieved. The space of the radiotherapy area can be increased, and the risk of collision between the operator or the patient and the radiotherapy equipment is reduced. At the same time, the sense of oppression brought to the patient by the radiotherapy equipment is also reduced, the patient's experience effect is improved, and sufficient working space is provided around the top of the treatment bed.

[0051] In one embodiment, reference Figures 4 to 6 The housing device 100 may further include a driving assembly 3, which is used to drive the movable base plate 12 and the movable bracket 13 to move along the telescopic direction of the bracket assembly 1, that is, the driving assembly 3 can drive the bracket assembly 1 to telescopically move. The driving assembly 3 may include a motor (not shown), which can accurately make the radiotherapy device reach a predetermined position for radiotherapy, and can also accurately reduce the volume of the radiotherapy device to increase the space of the treatment area.

[0052] Specifically, refer to Figures 4 to 6 The driving assembly 3 may also include a first gear 31 and a second gear 33 disposed on the movable base plate 12, and a first rack 32 disposed on the fixed base 11 and a second rack 34 disposed on the movable bracket 13, which are respectively meshed 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 telescopic 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 telescopic direction of the bracket assembly 1. The first gear 31 and the second gear 33 are preferably coaxially disposed, and the first gear 31 and the second gear 33 are connected to the motor. One motor can drive the first gear 31 and the second gear 33 to rotate simultaneously, so that the number of motors can be reduced. On the one hand, the space occupied by the motor can be reduced, thereby reducing the volume of the housing assembly 2, thereby reducing the volume of the radiotherapy device. On the other hand, reducing the number of motors can reduce the manufacturing cost of the radiotherapy device.

[0053] The diameter of the second gear 33 is greater than the diameter of the first gear 31, so that the moving speed of the mobile bracket 13 is greater than the moving speed of the mobile 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 have the same rotational angular velocity, the distance that the mobile bracket 13 needs to drive the third housing 23 to move is longer than the distance that the mobile base plate 12 needs to move, so the diameter of the second gear 33 is greater than the diameter of the first gear 31, and the diameter of the second gear 33 and the diameter of the first gear 31 can be set according to actual needs, so that when the housing device 100 is retracted, the mobile bracket 13 and the mobile base plate 12 can reach their respective predetermined positions at the same time.

[0054] refer to Figures 4 to 6 The bracket assembly 1 may 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.

[0055] 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 arranged on the movable base plate 12, and the first slider 111 is arranged on the fixed base 11, or the first slide rail 121 is arranged on the fixed base 11, and the first slider 111 is arranged 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 slider 111 is four, and the two first slide rails 121 are respectively arranged 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 arranged at the four corners of the fixed base 11.

[0056] The number of the second slide rails 122 and the second slider 131 can be multiple, so as to make the connection between the mobile base plate 12 and the mobile bracket 13 more stable, and ensure that the movement between the mobile base plate 12 and the mobile bracket 13 is smoother. The second slide rail 122 is set on the mobile base plate 12, and the second slider 131 is set on the mobile bracket 13, or the second slide rail 122 is set on the mobile bracket 13, and the second slider 131 is set on the mobile 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, 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 mobile base plate 12 facing the mobile bracket 13, and the four second sliders 131 are respectively set at the four corners of the mobile bracket 13.

[0057] The bracket assembly 1 may 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 a 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.

[0058] refer to Figure 6 , Figure 7 A limiting portion 15 is provided at one end of the fixed base 11 close to the outer frame 200, and the limiting portion 15 is used to limit the distance that the movable bottom plate 12 moves toward one side of the outer frame 200;

[0059] When the housing device 100 is in a fully retracted state, the movable bracket 13 is located at the leftmost side of the movable bottom plate 12, and the movable bottom plate 12 is in contact with the limiting portion 15;

[0060] When the housing device 100 is in a fully extended state, the movable bracket 13 is located at the rightmost side of the movable base plate 12 .

[0061] refer to Figure 6 , Figure 7The housing device 100 may further include a fixing assembly 4, through which the bracket assembly 1 is fixedly connected to the outer frame connecting member 5, and the outer frame 200 (rotating frame) includes arms 201 located on both sides and an intermediate arm 202 connecting the two arms 201, the intermediate arm 202 is used to drive the housing device 100 and the outer frame 200 to move synchronously, and a particle accelerator for providing a particle beam is installed on the intermediate arm. Specifically, the fixing assembly 4 may include a screw 41 and a pin 42, the pin 42 is used for positioning between the fixing assembly 4 and the outer frame connecting member 5, so as to facilitate installation and removal between the fixing assembly 4 and the outer frame connecting member 5, and the screw 41 is used to fix the fixing assembly 4 and the outer frame connecting member 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 adjustment of the position between the fixed base 11 and the outer frame connecting piece 5, can eliminate processing errors between parts, and improve the installation accuracy between the fixed base 11 and the outer frame connecting piece 5.

[0062] In the previous equipment, the housing device 100 is 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 move separately, so there is always a time difference between the movement of the housing device 100 and the outer frame 200, and the inner frame 300 needs a separate cable system. Compared with the housing device 100 being set on the C-shaped track of the inner frame 300, the housing device 100 is directly fixed on the outer frame 200. The housing device 100 can 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 very simple, and the cable drag chain originally on the inner frame 300 can be cancelled. All cables on the housing device 100 go through the outer frame 200, integrating and optimizing the entire wiring structure, which can greatly reduce the debugging cost and production cost. The C-shaped guide rail on the C-shaped inner frame 300 is removed, 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 is removed, 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 costs and production costs.

[0063] In one embodiment, reference Figures 4 to 6The driving assembly 3 may further include a third gear 35 and a third rack 36 meshed with the third gear 35 and arranged on the second housing 22. The third gear 35 and the third rack 36 are used to drive the mobile bracket 13 to move along the extension direction of the bracket assembly 1. The third gear 35 may be driven directly by the motor, or indirectly by the first gear 31 or the second gear 33. In this embodiment, the third gear 35 is driven by the second gear 33, the fourth gear 37 and the fifth gear 38 meshed with each other, 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. The third gear 35 and the fifth gear 28 are preferably coaxially arranged, that is, the third gear 35 rotates with the fifth gear 38, the second gear 33, the fourth gear 37 and the fifth gear 38 are preferably gears of the same specifications, and the second gear 33, the fourth gear 37 and the fifth gear 38 are linearly distributed along the extension direction of the bracket assembly 1, so that the third rack 36 can be prevented from interfering with the second gear 33, the fourth gear 37 and the fifth gear 38 when moving.

[0064] 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 contracted.

[0065] 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 make the second housing 22 perform linear motion along the extension direction of the bracket assembly 1. Specifically, the number of pulleys 132 is preferably multiple, for example, four, and the four pulleys 132 are distributed in a quadrilateral, and two pulleys 132 are respectively provided on both sides of the guide rail 133. The four pulleys 132 can constrain the guide rail 133 to perform linear motion along the extension direction of the bracket assembly 1, thereby ensuring that the second housing 22 performs linear motion along the extension direction of the bracket assembly 1. The pulley 132 and the guide rail 133 also have a supporting function for the second housing 22, which can improve the stability of the second housing 22 and prevent the second housing 22 from shaking during movement.

[0066] The present invention 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 arranged on the inner frame 300.

[0067] The present invention also provides a radiotherapy device, comprising the above-mentioned treatment head, an outer frame 200, a C-shaped inner frame 300, and a particle accelerator installed on the outer frame. In some embodiments, the radiotherapy device is used for proton radiotherapy.

[0068] During the treatment, the treatment head will rotate along with the rotation of the outer frame 200. In previous devices, the treatment head was fixed on the C-shaped track of the inner frame 300. The treatment head and the outer frame 200 moved separately, so there was always a time difference between the movement of the treatment head and the outer frame 200, and the inner frame 300 required a separate cable system. In order to simplify the frame design, a design update was made, and the treatment head was directly fixed on the outer frame 200, so that the synchronous movement of the treatment head and the outer frame 200 can be ensured, and the cable is also greatly optimized.

[0069] The use of a double-layer bracket, i.e., a movable bottom plate 12 and a movable bracket 13, can achieve a larger extension position, so that the radiation beam outlet 231 of the treatment head is closer to the isocenter. For a treatment room using a C-frame, the double-layer extension bracket can directly connect the treatment head to the external frame 200, remove the control motor on the C-frame, and fundamentally solve the error and synchronous control problem of the movement of the external frame 200 and the movement of the treatment head on the C-frame in the prior art. The external frame 200 rotates synchronously with the treatment head, reducing waiting time and position deviation.

[0070] The present invention also provides a method for moving a treatment head, wherein the treatment head is the treatment head described above, and the method comprises:

[0071] The initial state of the treatment head at the initial position is set to be retracted to the final state along the front-back direction;

[0072] 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;

[0073] After completing the particle beam irradiation at the predetermined position, the treatment head is retracted to the first position.

[0074] As a preferred embodiment, the method further comprises: after retracting the treatment head to the first position, rotating the outer frame 200 to return the treatment head to the initial position.

[0075] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, substitute and modify the above embodiments within the scope of the invention without departing from the principles and purpose of the present invention. All such changes should fall within the scope of protection of the claims of the present invention.

Claims

1. A housing device, characterized in that: include: A support assembly, the support assembly comprising a fixed base, a movable bottom plate and a movable support, the movable bottom plate being arranged on the fixed base and being movable along the extension and retraction direction of the support assembly, the movable support being arranged on the movable bottom plate and being movable along the extension and retraction direction of the support assembly, at least one of the movable bottom plate and the movable support being used for installing an ionization chamber and / or for installing a device for adjusting a particle beam; A shell assembly, wherein the shell assembly is covered outside at least a portion of the support assembly, and a radiation beam outlet is provided at one end of the shell assembly facing the patient. The shell assembly includes at least three shells arranged in sequence along the telescopic direction of the support assembly, at least one of the shells is fixedly connected to the fixed base, and the other shells can at least partially enter or leave the shell fixedly connected to the fixed base along the telescopic direction of the support assembly as the movable base plate and / or the movable support at least partially enter or leave the shell fixedly connected to the fixed base.

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

3. The housing device according to claim 2, characterized in that: The transmission mechanism 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 1, characterized in that: 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.

5. The housing device according to claim 1, characterized in that: 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.

6. The housing device according to claim 3, characterized in that: 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 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.

7. The housing device according to claim 6, characterized in that: The transmission mechanism also includes a third gear and a third rack meshing with the third gear and arranged on the second housing. The third gear and the third rack are used to drive the movable bracket to move along the telescopic direction of the bracket assembly.

8. The housing device according to claim 6, characterized in that: 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.

9. The housing device according to claim 6, characterized in that: A limiting portion is provided at one end of the fixed base 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 at the leftmost 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 at the rightmost side of the movable base plate.

10. A treatment head, characterized in that: Comprising a housing device as described in any one of claims 1-9.

11. A radiotherapy device, characterized in that: It comprises the treatment head as claimed in claim 10 and an external frame, wherein the external frame is a rotating frame, comprising arms located on both sides and a middle arm connecting the two arms, and a particle accelerator for providing a particle beam is installed on the middle arm.

12. A method for moving a treatment head, characterized in that: The treatment head is the treatment head according to claim 10, and the method comprises: 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.

13. The method for moving a treatment head according to claim 12, characterized in that: 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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