WO2022170602A1

WO2022170602A1 - Chassis, radiotherapy device, and imaging device

Info

Publication number: WO2022170602A1
Application number: PCT/CN2021/076601
Authority: WO
Inventors: 刘海峰
Original assignee: 西安大医集团股份有限公司
Priority date: 2021-02-10
Filing date: 2021-02-10
Publication date: 2022-08-18
Also published as: CN116801947A

Abstract

Provided in the present disclosure are a chassis, a radiotherapy device, and an imaging device. The chassis comprises a chassis body, the chassis body comprising a fixed frame and a rotating frame, and the fixed frame swinging around a swing axis; the rotating frame is rotatably mounted on the fixed frame and swings around the swing axis synchronously with the fixed frame; and the axis of rotation of the rotating frame intersects the swing axis.

Description

Gantry, Radiation Therapy Equipment and Imaging Equipment

technical field

The present disclosure relates to the technical field of medical devices, and in particular, to a gantry, radiotherapy equipment and imaging equipment.

Background technique

Cancer has become the main killer endangering human health and one of the major diseases threatening the health of our nation. Radiation therapy is still one of the main methods for the treatment of malignant tumors, and about 65%-70% or higher proportion of tumor patients need to receive different degrees of radiation therapy.

In the course of radiotherapy, there are generally two types of radiotherapy: stereotactic radiotherapy and conformal intensity-modulated radiotherapy. Stereotactic radiotherapy is to focus multiple beams of rays on one position (ie target), which can achieve high-dose irradiation of the target, so as to achieve the purpose of treatment. Stereotactic radiotherapy is suitable for small-volume tumors; conformal intensity-modulated radiotherapy is achieved through The multi-leaf collimator performs conformal processing on the rays, so that the shape of the field is consistent with the shape of the tumor, so that the tumor can be fully treated with radiotherapy. Conformal intensity-modulated radiotherapy is suitable for large-volume tumors.

public content

In one aspect, the present disclosure provides a rack:

In some embodiments, the frame includes a frame body, the frame body includes a fixed frame and a rotating frame, the fixed frame swings around a swing axis; the rotating frame is rotatably mounted on the fixed frame, and It swings around the swing axis synchronously with the fixed frame; wherein, the rotation axis of the rotating frame intersects the swing axis.

In some embodiments, the swing axis is perpendicular to the rotation axis of the rotating frame.

In some embodiments, the rotating frame includes a first mounting portion and a second mounting portion, the first mounting portion is rotatably mounted on the fixed frame for mounting the multiplexed ray source; the second mounting portion For installing the first collimator and the second collimator; wherein, the first installation part and the second installation part can move relative to each other, when the first collimator or the second collimator When docked with the multiplexed ray source, the first mounting portion and the second mounting portion can also rotate synchronously relative to the fixing frame around the rotation axis.

In some embodiments, the first mounting portion rotates about the rotation axis relative to the second mounting portion; alternatively, the second mounting portion rotates relative to the first mounting portion about the rotation axis; Alternatively, the first mounting portion and the second mounting portion rotate about the rotation axis at different rates and/or different directions.

In some embodiments, the first mounting portion is a ring frame or a C-shaped frame, and/or the second mounting portion is a ring frame or a C-shaped frame.

In some embodiments, the rotating frame further includes a locking structure that locks the first mounting portion and the second mounting portion.

In some embodiments, the rotating frame and the fixed frame synchronously swing around the swing axis within a range of -40°˜+40°.

In some embodiments, the rotating frame rotates counterclockwise or clockwise about the axis of rotation.

In some embodiments, the rack further includes a base disposed at the bottom of the rack body, the fixing frame is rotatably connected to the base, and the fixing frame swings around the base relative to the base Axis swings.

In some embodiments, the rack further includes a support frame, which is rotatably connected to the fixing frame for supporting the rack body.

In some embodiments, the support frame includes a top plate and a plurality of support columns, the top plate is disposed on the top of the rack body, and is rotatably connected to the fixing frame, and the fixing frame surrounds the support frame relative to the support frame. The swing axis swings; the plurality of support columns are arranged below the top plate for supporting the top plate.

In some embodiments, the rack further includes a driving device, and the driving device is used to drive the rotating frame to rotate relative to the fixed frame, and to drive the rotating frame and the fixed frame to rotate around the fixed frame synchronously. The swing axis swings.

In another aspect, the present disclosure provides a radiation therapy apparatus:

In some embodiments, the radiotherapy apparatus includes a radiotherapy head and the gantry according to any of the above embodiments, the radiotherapy head being disposed on the rotating gantry.

In some embodiments, the radiotherapy head comprises a stereotaxic head and/or a conformal intensity modulated head.

In some embodiments, where the rotating frame includes the first mounting portion and the second mounting portion, the radiotherapy head includes a multiplexed radiation source, a first collimator, and a second collimator The multiplexed ray source is used for emitting rays and is installed on the first installation part; the first collimator is used for beam limiting the rays and installed on the second installation part; The second collimator is used to limit the beam, and is installed on the second installation part.

In some embodiments, the first collimator is a channel collimator, and the second collimator is a single-layer or multi-leaf collimator.

In some embodiments, the multiplexed ray source is an X-ray source.

In some embodiments, the swing axis passes through an isocenter of the radiation therapy device.

In some embodiments, the radiotherapy apparatus further includes an imaging device including an imaging source and an imager, the imaging source and the imager being mounted on the rotating gantry.

In yet another aspect, the present disclosure provides an imaging device:

In some embodiments, the imaging apparatus includes an imaging device and a gantry as described in any of the above embodiments, the imaging device including an imaging source and an imager, the imaging source and the imager being mounted on the on the rotating frame.

Description of drawings

In order to illustrate the technical solutions in the present disclosure more clearly, the following briefly introduces the accompanying drawings that need to be used in some embodiments of the present disclosure. Obviously, the accompanying drawings in the following description are only the appendixes of some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can also be obtained from these drawings. In addition, the accompanying drawings in the following description may be regarded as schematic diagrams, and are not intended to limit the actual size of the product involved in the embodiments of the present disclosure, the actual flow of the method, the actual timing of signals, and the like.

FIG. 1 is a structural diagram of a frame according to some embodiments (the fixing frame is not oscillated);

FIG. 2 is another structural diagram of a frame according to some embodiments (fixed frame swing setting angle);

FIG. 3 is a schematic diagram of two treatment planes formed before and after swinging of the fixture according to some embodiments;

Fig. 4A is the B-B sectional view of the structure in Fig. 12;

4B is a schematic diagram of a fixed frame and a rotating frame respectively located at a first limit position and a second limit position according to some embodiments;

FIG. 5 is another structural diagram of a frame according to some embodiments (the fixing frame is not oscillated);

FIG. 6 is another structural diagram of a frame according to some embodiments (fixed frame swing setting angle);

7 is a schematic diagram of the mating of a base and a turntable according to some embodiments;

8 is a block diagram of a base according to some embodiments;

Fig. 9 is the A-A sectional view of the structure in Fig. 7;

10 is yet another structural diagram of a rack according to some embodiments;

Figure 11 is a side view of the structure in Figure 10;

FIG. 12 is a schematic diagram of the cooperation of the fixing frame, the first mounting portion and the second mounting portion according to some embodiments;

13 is yet another structural diagram of a rack according to some embodiments;

14 is a block diagram of a radiation therapy apparatus according to some embodiments;

15 is a block diagram of an imaging apparatus according to some embodiments.

Detailed ways

The technical solutions in some embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, but not all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments provided by the present disclosure fall within the protection scope of the present disclosure.

Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and its other forms such as the third person singular "comprises" and the present participle "comprising" are used It is interpreted as the meaning of openness and inclusion, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" example)" or "some examples" and the like are intended to indicate that a particular feature, structure, material or characteristic related to the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be included in any suitable manner in any one or more embodiments or examples.

Hereinafter, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

The terms "center", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, It is constructed and operated in a particular orientation and therefore should not be construed as a limitation of the present disclosure.

It should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection. It can be directly connected, or indirectly connected through an intermediate medium, and it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

"At least one of A, B, and C" has the same meaning as "at least one of A, B, or C", and both include the following combinations of A, B, and C: A only, B only, C only, A and B , A and C, B and C, and A, B, and C.

"A and/or B" includes the following three combinations: A only, B only, and a combination of A and B.

In the related art, for stereotactic radiotherapy, the radiotherapy head is mounted on a rotating frame in a gantry, and rotates together with the rotating frame, so as to perform radiotherapy on a tumor patient's target. Because the rotating frame rotates around the fixed axis of rotation, the radiotherapy head also rotates around the fixed axis of rotation. Then, for a certain radiation source of the radiotherapy head, the beam emitted by it is always in the same treatment position during one rotation. in plane. The beam emitted by the radiation source passes through the skin around the target to irradiate the target. Because radiation therapy is a continuous process, the skin irradiated by the beam will be irradiated for a long time, and the damage will be more serious.

In order to solve the above problems, as shown in FIG. 1 , the present disclosure provides a rack 01 , the rack 01 includes a rack body 100 , and the rack body 100 includes a fixed frame 1 and a rotating frame 2 , and the fixed frame 1 is about a swing axis 3 swings (in the direction of the solid line arrow described in Figure 2), the rotating frame 2 is rotatably mounted on the fixed frame 1, and swings around the swing axis 3 synchronously with the fixed frame 1; wherein, as shown in Figure 2, the rotating frame 2 The rotational axis 24 intersects the pivot axis 3 .

For example, as shown in FIG. 2 , the rotating frame 2 may be an annular frame, the axis of the rotating frame 2 is the rotation axis 24 relative to the fixed frame 1 , and the inner cavity of the rotating frame 2 forms a treatment cavity 21 for treatment. The rotating frame 2 is used to install the radiotherapy head 4 and can drive the radiotherapy head 4 to rotate around its rotation axis 24 within a range of 360°. The patient 5 lies on the treatment couch 6 and is sent into the treatment cavity 21 of the rotating frame 2 , and then the rotating frame 2 drives the radiotherapy head 4 to treat the patient 5 .

Based on this, in the case where the fixed frame 1 can swing around the swing axis 3, and the rotating frame 2 and the fixed frame 1 swing around the swing axis 3 synchronously, when the fixed frame 1 is in the state shown in FIG. For any target ray source in the radiotherapy head 4 on the frame 2, the rotating frame 2 drives the radiotherapy head 4 to rotate, and the outline of the treatment plane of the target ray source is the first outline as shown in FIG. 3 7. When the fixed frame 1 swings around the swing axis 3 to a set angle and is in the state shown in FIG. 2 , the rotating frame 2 drives the radiotherapy head 4 to rotate, and the contour of the treatment plane of the target radiation source is the first in FIG. 3 . Two contour lines 8.

The treatment plane enclosed by the first contour line 7 is defined as the first treatment plane, and the treatment plane enclosed by the second contour line 8 is defined as the second treatment plane.

Obviously, if the first treatment plane and the second treatment plane are not coplanar, the target radiation source will irradiate the target point from the skin at different positions.

It can be seen that during the treatment process, because the time required for radiotherapy for the same target is determined, the treatment plane of a certain target ray source in the radiotherapy head 4 is changed by swinging the fixed frame 1 and the rotating frame 2, so that The radiation used for radiation therapy passes through the skin at more positions to reach the target point, so that the irradiation time for the skin at the same position will be shortened, and the degree of damage to the skin by the radiation will also be reduced.

It should be noted that, the above-mentioned treatment plane refers to the range area touched by the radiation beam emitted by the target radiation source in the radiotherapy head 4 when it rotates around the rotation axis 24 .

In addition, after the fixed frame 1 swings, the radiation emitted by the target radiation source in the radiotherapy head 4 installed on the rotating frame 2 can still irradiate the target point of the patient 5, the fixed frame 1 and the rotating frame 2 swing around synchronously. After the axis 3 swings, in some cases, it may be necessary to move the treatment couch 6 so that the radiation emitted by the target radiation source in the radiotherapy head 4 can irradiate the target point of the patient 5 .

In order to facilitate the setting of the rack 01 , in some embodiments, the swing axis 3 can be set to be perpendicular to the rotation axis 24 of the rotating rack 2 . In this case, the pivot axis 3 lies in a plane perpendicular to the rotation axis 24 .

Furthermore, in some embodiments of the present disclosure, in order to enable the patient 5 to be treated by different radiotherapy heads 4 , it may therefore be necessary to provide at least two different types of radiotherapy heads 4 on the rotating frame 2 . In this case, in order to reduce the weight that the entire rack 01 needs to carry, as shown in FIG. 4A , the rotating frame 2 may include a first mounting portion 22 and a second mounting portion 23 . The first mounting portion 22 is rotatably mounted on the fixing frame 1 , and the first mounting portion 22 is used for mounting the multiplexed radiation source 9 . The second mounting portion 23 is used for mounting the first collimator 10 and the second collimator 20 . The first mounting portion 22 and the second mounting portion 23 can move relative to each other. When the first collimator 10 or the second collimator 20 is docked with the multiplexed ray source 9, the first mounting portion 22 and the second mounting portion 23 can also rotate synchronously relative to the fixed frame 1 around the rotation axis 24 of the rotating frame 2 .

Based on this, during the movement of the first mounting portion 22 relative to the second mounting portion 23, the first collimator 10 and the multiplexed radiation source 9 can be docked to form a radiotherapy head, and the second collimator can also be The straightener 20 is docked with the multiplexed radiation source 9 to form another radiotherapy head. In this way, although the radiotherapy equipment using the gantry 01 provided by the present disclosure is provided with two radiotherapy heads, because the two radiotherapy heads can share one multiplexed ray source 9, it is equivalent to reducing two radiotherapy heads. The total weight of the head, thereby reducing the weight carried by the rack 01.

For example, the above-mentioned multiplexed ray source 9 may be an X-ray source, specifically an X-ray accelerator. The above-mentioned first collimator 10 may be a channel collimator, and the second collimator 20 may be a single-layer multi-leaf collimator or a multi-layer multi-leaf collimator. Because X-ray accelerators, channel collimators, single-layer multi-leaf collimators and multi-layer multi-leaf collimators are existing mature technologies, X-ray accelerators, channel collimators, single-layer multi-leaf collimators are not repeated here. The specific structure and working process of the collimator and the multilayer multi-leaf collimator.

The manner in which the first mounting portion 22 moves relative to the second mounting portion 23 is exemplified below. For example, the first installation part 22 may rotate relative to the second installation part 23 around the rotation axis 24 of the revolving frame 2, that is, the second installation part 23 is fixed and only the rotation of the first installation part 22 is controlled. During the rotation of the part 22 , the first collimator 10 or the second collimator 20 can be docked with the multiplexed ray source 9 .

Alternatively, the second mounting portion 23 may rotate relative to the first mounting portion 22 around the rotation axis 24 of the revolving frame 2, that is, the first mounting portion 22 is fixed and only the rotation of the second mounting portion 23 is controlled. During the rotation of the mounting portion 23 , the first collimator 10 or the second collimator 20 can be docked with the multiplexed ray source 9 .

Alternatively, the first mounting portion 22 and the second mounting portion 23 may also rotate around the rotation axis 24 of the rotating frame 2 at different speeds and/or different directions. Exemplarily, if the first mounting portion 22 rotates counterclockwise around the rotation axis 24 of the rotating frame 2, the second mounting portion 23 can rotate clockwise around the rotating axis 24 of the rotating frame 2. At this time, the first mounting portion 22 In the process of rotating with the second mounting portion 23, the first collimator 10 or the second collimator 20 can be docked with the multiplexed ray source 9, or, the first mounting portion 22 and the second mounting portion 23 rotate in the same direction, but the angular velocities of the two are different, then during the rotation of the first mounting part 22 and the second mounting part 23, the first collimator 10 or the second collimator 20 and the multiplexed ray source can also be made 9 Docking.

In some embodiments, the first mounting portion 22 and the second mounting portion 23 can also achieve relative movement through sliding fit, for example, a slide rail is provided between the first mounting portion 22 and the second mounting portion 23, which may be the first mounting portion 22 and the second mounting portion 23. The mounting portion 22 is fixed and the second mounting portion 23 slides relative to the first mounting portion 22 along the slide rail. Alternatively, the second mounting portion 23 may be fixed and the first mounting portion 22 is relative to the second mounting portion along the slide rail. 23 sliding, as long as it is ensured that the first collimator 10 and the second collimator 20 can be docked with the multiplexed ray source 9 during the relative sliding of the first mounting part 22 and the second mounting part 23 .

In some embodiments, the first mounting portion 22 may be a ring frame or a C-shaped frame, and/or the second mounting portion 23 may be a ring frame or a C-shaped frame. Exemplarily, as shown in FIG. 4A , the first mounting portion 22 and the second mounting portion 23 are both annular frames, and the second mounting portion 23 is at least partially located in the first mounting portion 22 . The two collimators 20 are mounted on the portion of the second mounting portion 23 located in the first mounting portion 22 .

In some embodiments, the first mounting portion 22 may also be a C-shaped frame, and the second mounting portion 23 may also be a C-shaped frame. The present disclosure does not make any specific shapes of the first mounting portion 22 and the second mounting portion 23 . limited.

In order to prevent the rotating frame 2 or the components mounted on the rotating frame 2 from colliding with the treatment couch 6 or the patient 5 lying on the treatment couch 6 after the rotating frame 2 and the fixed frame 1 swing around the swing axis 3 synchronously, the present disclosure In this embodiment, the rotating frame 2 and the fixed frame 1 swing synchronously around the swing axis 3 within the range of -40° to +40°. Specifically, as shown in FIG. 4B , the fixed frame 1 and the rotating frame 2 can swing α° from the first limit position a1 to the second limit position a2, and the value of α is 80. Of course, -40°～+40° is the limit value range of the swing of the fixed frame 1 and the rotating frame 2. In some embodiments, the swing angle of the fixed frame 1 and the rotating frame 2 only needs to be in the range of -40°～+40° It can be within the range, such as -35°～+35°, or -30°～+30°, all can be used.

In the embodiment of the present disclosure, the rotating frame 2 rotates counterclockwise or clockwise around the rotation axis 24 . That is, the rotating frame 2 can rotate clockwise around the rotation axis 24, and can also rotate counterclockwise around the rotation axis 24, which can be selected according to the actual situation. In some embodiments, the rotating frame 2 may only be able to rotate clockwise around the rotation axis 24 , or only be able to rotate counterclockwise around the rotation axis 24 , both of which may be used.

In the embodiment of the present disclosure, as shown in FIG. 5 , the rack 01 may further include a base 30 , the base 30 is disposed at the bottom of the rack body 100 , the fixing frame 1 is rotatably connected to the base 30 , and the fixing frame 1 is relative to the base 30 . The seat 30 swings about the swing axis 3 . The following describes how the fixing frame 1 swings with respect to the base 30 .

Exemplarily, the rotational cooperation between the fixing frame 1 and the base 30 is described by taking the swing axis 3 extending along the X direction shown in FIG. 1 as an example. As shown in FIG. 7 , a turntable 40 is rotatably mounted on the base 30 , and the turntable 40 is rotatably mounted on the base 30 through the first bearing 50 as shown in FIG. 9 . Specifically, as shown in FIG. 8 , the base 30 is provided with a base mounting hole 301 , and the axis of the base mounting hole 301 is collinear with the swing axis 3 . As shown in FIG. 9 , the turntable 40 and the first bearing 50 are installed in the base installation hole 301 . The turntable 40 includes a large-diameter section 401 and a small-diameter section 402 whose axes extend in the X direction. The abutment forms a downward turntable step surface.

In this way, the outer ring of the first bearing 50 is in interference fit with the hole wall surface of the base mounting hole 301 , the outer peripheral surface of the small diameter section 402 of the turntable 40 is in interference fit with the inner ring of the first bearing 50 , and the step surface of the turntable is supported on the On the end face of the first bearing 50 facing the large diameter section 401 , the other end face of the first bearing 50 fits with the bottom of the base mounting hole 301 , so that the turntable 40 can rotate relative to the base 30 around its axis.

The above is only an example, and the rotation connection between the fixing frame 1 and the base 30 can also be realized in other ways. For example, the fixing frame 1 and the base 30 are connected by a rotating shaft, and the rotating shaft passes through the fixing frame 1 and the base 30. The axis of the rotating shaft is collinear with the swing axis 3, and the fixed frame 1 can swing around the rotating shaft.

In addition, when the fixing frame 1 is a ring frame, because the fixing frame 1 is inconvenient to be fixed on the turntable 40, as shown in FIG. 5 and FIG. The fixing frame 1 is fixedly installed on the turntable 40 through the mounting plate 60 and the supporting fastening bolts 70 , so that the fixing frame 1 is installed on the turntable 40 , so that the fixing frame 1 can rotate relative to the base 30 together with the turntable 40 . In this way, the fixing frame 1 is rotatably connected to the base 30, and the base 30 can not only be used to support the fixing frame 1, but also rotate relative to the fixing frame 1, so that the overall stability of the rack 01 is better.

On this basis, in order to further improve the stability of the rack 01, as shown in FIG. 10 and FIG. 11 , the rack 01 further includes a support frame 80, which is rotatably connected to the fixing frame 1 for supporting the rack body 100 . The support frame 80 is rotatably connected with the fixed frame 1, and the rotation axis of the support frame 80 and the fixed frame 1 is collinear with the swing axis 3, then when the fixed frame 1 swings around the swing axis 3, the base 30 is used to support and install the fixed frame 1 , the support frame 80 is used to support the fixing frame 1, thereby making the whole frame 01 more stable when the fixing frame 1 swings.

Exemplarily, as shown in FIG. 10 and FIG. 11 , the support frame 80 includes a top plate 801 and a plurality of support columns 802. The top plate 801 is disposed on the top of the rack body 100 and is rotatably connected to the fixing frame 1, and the fixing frame 1 is relative to the supporting frame. 80 oscillates about the oscillating axis 3 . A plurality of support columns 802 are disposed under the top plate 801 for supporting the top plate 801 .

As shown in FIGS. 10 and 11 , a connecting rod 90 is welded and fixed on the top of the fixing frame 1 , the axis of the connecting rod 90 is collinear with the swing axis 3 , and the connecting rod 90 is rotatably connected with the top plate 801 , so that the fixing frame 1 and the Rotational connection of the top plate 801.

In some embodiments, the rack 01 further includes a driving device, and the driving device is used to drive the rotating frame 2 to rotate relative to the fixed frame 1 and to drive the rotating frame 2 and the fixed frame 1 to synchronously swing around the swing axis 3 . The following describes how the driving device drives the fixed frame 1 and the rotating frame 2 to operate.

Exemplarily, in some embodiments, as shown in FIGS. 10 and 11 , the driving device may include a first driving motor 200 fixed on the lower side of the top plate 801 with its output shaft facing downward. The axis of the output shaft of the first drive motor 200 is collinear with the axis of the connecting rod 90 , and the output shaft of the first driving motor 200 is drivingly connected with the connecting rod 90 and can drive the connecting rod 90 to rotate around its axis, so as to realize the driving of the fixed frame 1 turn. In some embodiments, the first driving motor 200 can also be replaced by other driving mechanisms, such as a hydraulic motor, which can also be used.

In addition, in some embodiments, as shown in FIG. 12 , the driving device further includes a second driving motor 300 , and the second driving motor 300 is used to drive the rotating frame 2 to rotate around the rotation axis 24 . 22. The second mounting portion 23 and the fixing frame 1 are both annular frames as an example to illustrate that the second driving motor 300 drives the rotating frame 2 to rotate.

As shown in FIG. 12 , the first installation part 22 is rotatably installed in the fixing frame 1 , the second installation part 23 is also rotatably installed in the fixing frame 1 , and the second installation part 23 also passes through the inner cavity of the first installation part 22 , the fixing frame 1 , the first installation part 22 and the second installation part 23 are arranged concentrically, that is, the three structural axes are collinear, and the structural axis simultaneously constitutes the rotation axis 24 of the first installation part 22 and the second installation part 23 . The following describes how the first mounting portion 22 and the second mounting portion 23 are mounted on the fixing frame 1 .

As shown in FIG. 12 , two first mounting seats 400 may be provided in the inner cavity of the fixing frame 1 , and the two first mounting seats 400 are arranged at intervals along the axial direction of the fixing frame 1 . A mounting hole coaxial with the fixing frame 1 is provided, a second bearing 500 is mounted in the mounting hole, and the first mounting portion 22 is rotatably mounted on the two first mounting seats 400 through the two second bearings 500 around its structural axis. Then, it can be rotated and installed in the fixing frame 1 .

In addition, as shown in FIG. 12 , two second mounting bases 600 may also be provided in the inner cavity of the fixing frame 1 , and the two second mounting bases 600 are arranged at intervals along the axial direction of the fixing frame 1 and are separated into two second mounting bases 600 . On the opposite sides of a mounting seat 400, the two second mounting seats 600 are provided with mounting holes coaxial with the fixing frame 1, the third bearing 700 is mounted in the mounting holes, and the second mounting portion 23 passes through the two third The bearing 700 is rotatably mounted on the two second mounting seats 600 around its structural axis, so as to be rotatably mounted in the fixing frame 1 .

In addition, in order to drive the second mounting portion 23 to rotate, as shown in FIG. 12 , a driving gear 800 is fixedly mounted on one end of the second mounting portion 23 , and the output shaft of the second driving motor 300 is provided with a driving gear 800 engaged with the driving gear 800 . The fixed gear 900 is fixed, and the second driving motor 300 drives the second mounting part 23 to rotate through the fixed gear 900 and the driving gear 800 .

Based on this, in order to drive the first mounting portion 22, as shown in FIG. 12, a first annular protrusion 1000 is provided at one end of the second mounting portion 23 close to the driving gear 800, and the end of the first mounting portion 22 corresponds to the first annular protrusion 1000. The annular protrusion 1000 is provided with a second annular protrusion 2000 . After the first installation portion 22 and the second installation portion 23 are installed, the first annular protrusion 1000 and the second annular protrusion 2000 are mutually in the axial direction of the fixing frame 1 . fit.

On this basis, as shown in FIG. 12 , the first annular protrusion 1000 and the second annular protrusion 2000 are correspondingly provided with connecting holes extending along the axial direction of the fixing frame 1 , which can be inserted into the first annular protrusion through the pin shaft 3000 at the same time. The protrusions 1000 and the second annular protrusions 2000 are in the corresponding connection holes, so as to realize the anti-rotation of the first mounting portion 22 and the second mounting portion 23, and then the second driving motor 300 can drive the second mounting portion 23 to rotate. At the same time, the first installation part 22 is driven to rotate, that is, the second drive motor 300 can drive the first installation part 22 and the second installation part 23 to rotate around the rotation axis 24 synchronously.

Further, in order to prevent the pin shaft 3000 from falling out of the connection hole during use, as shown in FIG. 12 , a baffle plate 30001 is provided at one end of the pin shaft 3000, a through hole is arranged on the baffle plate 30001, and at the same time the first annular The protrusion 1000 is provided with a threaded hole corresponding to the through hole, and a fixing bolt 4000 is used to pass through the through hole and then screw into the threaded hole to press and fix the baffle plate 30001 on the first annular protrusion 1000 .

In order to facilitate the installation of the pin shaft 3000, an avoidance hole (not shown in the figure) is provided on the second mounting seat 600 at a position corresponding to the connection hole on the first annular protrusion 1000, and the avoidance hole allows the operator's hand to pass through to install the pin Axis 3000.

As can be seen from the above, in order to facilitate the installation of the first mounting portion 22 and the second mounting portion 23, as shown in FIG. 4A, the fixing frame 1 is divided into the upper part 11 of the ring frame and the lower part 12 of the ring frame by the horizontal plane where the axis thereof is located. The mounting seat 400 and the second mounting seat 600 are also divided into upper and lower parts by the above-mentioned horizontal plane. In this case, the upper part of the first installation seat 400 and the second installation seat 600 can be fixed on the upper part 11 of the ring frame, and the lower part of the first installation seat 400 and the second installation seat 600 can be fixed on the lower part of the ring frame 12 on.

In addition, the upper part 11 of the ring frame and the lower part 12 of the ring frame are correspondingly provided with mounting ears 13, and the corresponding mounting ears 13 are fixed together by locking bolts 14 and locking nuts 15, so as to fix the upper part 11 of the ring frame and the lower part 12 of the ring frame on the Together. It should be noted that there are multiple pairs of mounting ears 13 corresponding to each other along the axial direction of the fixing frame 1, and multiple pairs are provided on both sides of the fixing frame 1, so as to improve the fixing reliability of the upper part 11 of the ring frame and the lower part 12 of the ring frame sex. When assembling the frame 01, firstly install the first mounting part 22, the second mounting part 23, the second bearing 500 and the third bearing 700 on the lower part 12 of the ring frame, and then fix the upper part 11 of the ring frame to the lower part of the ring frame 12 on.

In some embodiments, the fixing frame 1 may not be a ring frame. As shown in FIG. 13 , the fixing frame 1 may be a C-shaped frame, including two mutually parallel supporting plates 16 and a connecting plate 17 connecting the two supporting plates 16 , the two support plates 16 are arranged in the up-down direction, the lower support plate 16 is rotatably connected to the base 30, so as to realize the swing of the fixed frame 1, and the rotating frame 2 is arranged between the two support plates 16, and is rotatably installed On the lower support plate 16, the same can be used.

In some embodiments, the first installation part 22 may also have a separate driving mechanism, for example, the first installation part 22 is rotatably installed in the inner cavity of the fixing frame 1, and the end of the first installation part 22 is provided with a first power gear, It is driven by the first power motor provided with the matching gear on the output shaft, the second mounting part 23 is rotatably installed in the inner cavity of the first mounting part 22, and the end of the second mounting part 23 is provided with a second power gear, and The output shaft is driven by a second power motor with a matching gear. The second power motor is fixed in the inner cavity of the first mounting portion 22, and the second power motor is only used to drive the second mounting portion 23 relative to the first mounting portion. When the rotating frame 2 is required to rotate as a whole, the second power motor stops and the first power motor starts to operate to drive the entire rotating frame 2 to rotate relative to the fixed frame 1 .

The present disclosure also provides a radiotherapy apparatus, as shown in FIG. 1 , the radiotherapy apparatus includes the above-mentioned gantry 01 and a radiotherapy head, and the radiotherapy head is installed on the rotating frame 2 in the gantry 01 . The radiotherapy equipment includes the above-mentioned gantry 01, so it can solve the same technical problem and achieve the same technical effect, which will not be repeated here.

In some embodiments, as shown in FIG. 14 , the radiotherapy head may include a stereotaxic treatment head 41 and a conformal intensity modulated treatment head 42 . The stereotactic treatment head 41 and the conformal intensity modulated treatment head 42 are arranged around the circumference of the rotating frame 2. When using the radiotherapy equipment, the operator can select the stereotactic treatment head 41 and the conformal treatment head 41 according to the specific conditions of the patient 5. One or two of the intensity modulated treatment heads 42 treat the patient 5, so that the treatment is more targeted and the effect is better, and at the same time, the adaptability of the radiotherapy equipment is better.

In some embodiments, the radiotherapy head may also include only one of the stereotaxic treatment head 41 and the conformal intensity modulated treatment head 42, which can also be used. Of course, the radiotherapy head can also be of other types, all of which can be used.

In some embodiments, when at least two different types of radiotherapy heads need to be installed on the rotating frame 2, in order to reduce the weight that the whole frame 01 needs to carry, as shown in FIG. 4A, the rotating frame 2 includes a first installation The first mounting portion 22 and the second mounting portion 23 are rotatably mounted on the fixing frame 1, the first mounting portion 22 and the second mounting portion 23 can move relative to each other, and the first mounting portion 22 and the second mounting portion 23 also It can rotate synchronously relative to the fixed frame 1 around the rotation axis 24 of the rotating frame 2 . The radiotherapy head may include a multiplexed radiation source 9 , a first collimator 10 and a second collimator 20 , the multiplexed radiation source 9 is used for emitting radiation, and the multiplexed radiation source 9 is installed on the first installation part 22 . The first collimator 10 is used for beam-limiting rays and is installed on the second installation part 23 ; the second collimator 20 is used for beam-limiting rays and is installed on the second installation part 23 .

Based on this, during the movement of the first mounting portion 22 relative to the second mounting portion 23, the first collimator 10 and the multiplexed radiation source 9 can be docked to form a radiotherapy head, and the second collimator can also be The straightener 20 is docked with the multiplexed radiation source 9 to form another radiotherapy head. In this way, two radiotherapy heads are installed on the rotating frame 2 , but because the two radiotherapy heads share one multiplexed radiation source 9 , the weight carried by the gantry 01 is reduced.

Illustratively, the above-mentioned multiplexed ray source 9 is an X-ray source, specifically an X-ray accelerator. An X-ray accelerator generally includes an electron gun, an accelerating tube, a tungsten target, a microwave feeding device and other components, because the X-ray accelerator is an existing mature technology, and its specific structure and working process will not be repeated here.

The above-mentioned first collimator 10 can be a channel collimator, and the channel collimator can include multiple beam channels with different apertures, or a single beam channel with adjustable shape and size (aperture), and can also include only one size. (aperture) and non-adjustable channel shape, the channel collimator is used to generate a single narrow X-ray beam, the channel collimator is a mature prior art (also called beam limiter), and its specific structure and working process will not be repeated here. .

The above-mentioned second collimator 20 is a single-layer multi-leaf collimator or a multi-layer multi-leaf collimator. The multi-leaf collimator is used to form a field with the same shape and size as the tumor, and the multi-leaf collimator is a mature existing collimator. technology, and its specific structure and working process will not be repeated here.

In some embodiments, the multiplexed radiation source 9 can also be other types of radiation sources, such as a cobalt-60 radiation source, which can also be used. The first collimator 10 and the second collimator 20 may also be other collimators, as long as they can cooperate with the multiplexed radiation source 9 to form a radiotherapy head for treating the patient 5 .

In order to make the treatment plane generated by the target radiation source in the radiotherapy head still pass through the isocenter of the radiotherapy equipment after the fixture 1 swings, the swing axis 3 of the fixture 1 is set to pass through the isocenter of the radiotherapy equipment. The isocenter point is the intersection of the center line of the ray beam emitted by the target radiation source in the radiotherapy head and the rotation axis 24 of the rotating frame 2. If the swing axis 3 is set to pass through the isocenter point, after the fixed frame 1 swings, the radiotherapy head The center line of the ray beam emitted by the target ray source will still pass through the isocenter point, and in normal use, the treatment couch 6 will drive the patient 5 into the treatment cavity 21, and make the target point of the patient 5 at the isocenter point, so First, after the fixed frame 1 swings, the treatment couch 6 does not need to move, and the radiation emitted by the target radiation source in the radiotherapy head can still irradiate the target point of the patient 5, which reduces the difficulty and complexity of the operation of the radiotherapy equipment.

It should be noted that the target radiation source refers to the radiation source selected for the treatment in the radiation therapy head during the radiation therapy process. If there is only one ray source in the radiotherapy head, the ray source is the target ray source; if there are multiple ray sources in the radiotherapy head, any ray source among the multiple ray sources can be the above-mentioned target ray source .

In some embodiments, as shown in FIG. 4A , the radiotherapy apparatus further includes an imaging device including an imaging source 5000 and an imager 6000 , and the imaging source 5000 and the imager 6000 are mounted on the rotating frame 2 . The imaging device is used to realize high-precision patient positioning before treatment of the patient 5 and real-time monitoring treatment during treatment.

Exemplarily, as shown in FIG. 4A , the rotating frame 2 includes a first mounting portion 22 and a second mounting portion 23 , the imaging source 5000 and the imager 6000 are both mounted on the second mounting portion 23 , and the imaging source 5000 and the imager are both mounted on the second mounting portion 23 . The 6000 is arranged symmetrically about the isocenter of the radiation therapy device.

Exemplarily, the imaging source 5000 can be a KV-level X-ray tube capable of emitting a cone beam, and the imager 6000 can be a flat panel detector or a curved panel detector for receiving the cone emitted by the X-ray tube. shape the beam and form the shape and state of the patient's 5 tumor.

The present disclosure also provides an imaging device, as shown in FIG. 15 , the imaging device includes the above-mentioned gantry 01 and an imaging device, the imaging device includes an imaging source 5000 and an imager 6000 , and the imaging source 5000 and the imager 6000 are installed on the rotating frame 2 on. It should be noted that when the imaging source 5000 and the imager 6000 are arranged, the imaging source 5000 and the imager 6000 should be symmetrical about the intersection of the rotation axis 24 of the rotating frame 2 and the swing axis 3 . The imaging device is used to realize high-precision patient positioning before treatment of the patient 5 and real-time monitoring treatment during treatment.

It is defined that when the imaging source 5000 rotates with the rotating frame 2, the area covered by the rays it emits is the imaging plane, because the fixed frame 1 can swing around the swing axis 3, and the rotating frame 2 can swing around the swing axis 3 synchronously with the fixed frame 1. Therefore, after the fixed frame 1 and the rotating frame 2 swing synchronously, the imaging device will obtain a new imaging plane, and the imaging device can image the tumor of the patient 5 from different angles.

Exemplarily, as shown in FIG. 4A , when the rotating frame 2 includes the first mounting part 22 and the second mounting part 23 , the imaging source 5000 and the imager 6000 are both mounted on the second mounting part 23 .

The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical scope disclosed in the present disclosure, think of changes or replacements, should cover within the scope of protection of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

A rack, comprising a rack body, the rack body comprising:

The fixed frame swings around the swing axis;

a rotating frame, which is rotatably mounted on the fixing frame and swings around the swing axis synchronously with the fixing frame;

Wherein, the rotation axis of the rotating frame intersects with the swing axis.
The frame of claim 1, wherein the swing axis is perpendicular to the rotation axis of the swivel frame.
The frame of claim 1, wherein the rotating frame comprises:

The first installation part is rotatably installed on the fixing frame and used for installing the multiplexed ray source;

a second installation part, used for installing the first collimator and the second collimator;

Wherein, the first installation part and the second installation part are relatively movable, and when the first collimator or the second collimator is docked with the multiplexed ray source, the first installation part The second mounting portion and the second mounting portion can also rotate relative to the fixing frame around the rotation axis synchronously.
The rack of claim 3, wherein:

The first mounting portion rotates about the rotation axis relative to the second mounting portion; or,

The second mounting portion rotates about the rotation axis relative to the first mounting portion; or,

The first mounting portion and the second mounting portion rotate about the rotation axis at different rates and/or different directions.
The rack according to claim 3, wherein the first mounting portion is a ring frame or a C-shaped frame, and/or the second mounting portion is a ring frame or a C-shaped frame.
The rack of claim 3, wherein the rotating frame further comprises a locking structure that locks the first mounting portion and the second mounting portion.
The frame according to claim 1, wherein the rotating frame and the fixed frame are synchronously swung around the swing axis within a range of -40°˜+40°.
The gantry of claim 1, wherein the rotating frame rotates counterclockwise or clockwise about the axis of rotation.
The rack according to claim 1, wherein the rack further comprises a base disposed at the bottom of the rack body, the fixing frame is rotatably connected with the base, and the fixing frame is relative to the base The base swings about the swing axis.
The rack according to claim 1, wherein the rack further comprises a support frame, the support frame is rotatably connected with the fixing frame, and is used for supporting the rack body.
The rack of claim 10, wherein the support frame comprises:

a top plate, which is arranged on the top of the frame body and is rotatably connected with the fixing frame, and the fixing frame swings around the swing axis relative to the support frame;

A plurality of support columns are arranged below the top plate for supporting the top plate.
The rack of claim 1, wherein the rack further comprises:

The driving device is used for driving the rotating frame to rotate relative to the fixed frame, and for driving the rotating frame and the fixed frame to swing around the swing axis synchronously.
A radiotherapy apparatus, comprising a radiotherapy head and a gantry according to any one of claims 1-12, wherein the radiotherapy head is arranged on the rotating frame.
14. The radiotherapy apparatus of claim 13, wherein the radiotherapy head comprises a stereotaxic head and/or a conformal intensity modulated head.
14. The radiotherapy apparatus of claim 13, wherein, in the case where the rotating frame includes the first mounting portion and the second mounting portion, the radiotherapy head includes:

a multiplexed ray source, used for emitting rays, installed on the first installation part;

a first collimator, used for beam limiting the rays, mounted on the second mounting part;

A second collimator, used for beam limiting the rays, is mounted on the second mounting part.
The radiotherapy apparatus of claim 15, wherein the first collimator is a channel collimator, and the second collimator is a single-layer or multi-leaf collimator.
16. The radiotherapy apparatus of claim 15, wherein the multiplexed radiation source is an X-ray source.
14. The radiotherapy apparatus of claim 13, wherein the pivot axis passes through an isocenter of the radiotherapy apparatus.
14. The radiotherapy apparatus of claim 13, wherein the radiotherapy apparatus further comprises an imaging device including an imaging source and an imager, the imaging source and the imager mounted on the rotating frame .
An imaging apparatus comprising an imaging device and a gantry according to any one of claims 1-12, the imaging device comprising an imaging source and an imager, the imaging source and the imager being mounted on the rotating on the shelf.