Racks, radiotherapy and imaging devices

Abstract

The present disclosure provides a gantry, a radiotherapy device and an imaging device. The gantry comprises a gantry body, the gantry body comprises a fixed frame and a rotating frame, the fixed frame swings around a swing axis; the rotating frame is rotationally installed on the fixed frame and swings around the swing axis synchronously with the fixed frame; wherein a rotation axis of the rotating frame intersects the swing axis.

Description

gantry, radiotherapy equipment and imaging equipment Technical Field

[0001] This disclosure relates to the field of medical device technology, and in particular to a gantry, radiotherapy equipment and imaging equipment. Background Technology

[0002] Cancer has become a major killer of human health and one of the leading diseases threatening the health of the Chinese population. Radiotherapy remains one of the main methods for treating malignant tumors, with approximately 65%-70% or even higher of cancer patients requiring different levels of radiotherapy.

[0003] In radiotherapy, there are generally two types of radiotherapy: stereotactic radiotherapy (SRT) and intensity-modulated radiotherapy (IMRT). Stereotactic radiotherapy focuses multiple beams of radiation onto a single location (the target point), allowing for high-dose irradiation of that target to achieve the therapeutic goal. Stereotactic radiotherapy is suitable for small tumors. IRT uses a multi-leaf collimator to conform the radiation beams to the shape of the tumor, thus providing comprehensive radiotherapy. IRT is suitable for large tumors. Summary of the Invention

[0004] On the one hand, this disclosure provides a rack:

[0005] In some embodiments, the frame includes a frame body, the frame body includes a fixed frame and a rotating frame, the fixed frame swings about a swing axis; the rotating frame is rotatably mounted on the fixed frame and swings synchronously with the fixed frame about the swing axis; wherein the rotation axis of the rotating frame intersects the swing axis.

[0006] In some embodiments, the swing axis is perpendicular to the rotation axis of the rotating frame.

[0007] 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 and is used to mount a multiplexed X-ray source. The second mounting portion is used to mount a first collimator and a second collimator. The first mounting portion and the second mounting portion are movable relative to each other. When the first collimator or the second collimator is docked with the multiplexed X-ray source, the first mounting portion and the second mounting portion can also rotate synchronously relative to the fixed frame about the rotation axis.

[0008] In some embodiments, 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 in different directions.

[0009] In some embodiments, the first mounting part is a ring frame or a C-shaped frame, and / or the second mounting part is a ring frame or a C-shaped frame.

[0010] In some embodiments, the rotating frame further includes a locking structure that locks the first mounting portion and the second mounting portion.

[0011] In some embodiments, the rotating frame and the fixed frame swing synchronously around the swing axis within the range of -40° to +40°.

[0012] In some embodiments, the rotating frame rotates counterclockwise or clockwise about the rotation axis.

[0013] In some embodiments, the frame further includes a base disposed at the bottom of the frame body, the fixing frame is rotatably connected to the base, and the fixing frame swings about the swing axis relative to the base.

[0014] In some embodiments, the frame further includes a support frame rotatably connected to the fixed frame for supporting the frame body.

[0015] 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 frame body and is rotatably connected to the fixed frame. The fixed frame swings relative to the support frame about the swing axis. The plurality of support columns are disposed below the top plate for supporting the top plate.

[0016] In some embodiments, the frame further includes a drive device for driving the rotating frame to rotate relative to the fixed frame, and for driving the rotating frame and the fixed frame to swing synchronously about the swing axis.

[0017] On the other hand, this disclosure provides a radiotherapy device:

[0018] In some embodiments, the radiotherapy apparatus includes a radiotherapy head and a gantry as described in any of the above embodiments, the radiotherapy head being disposed on the rotating gantry.

[0019] In some embodiments, the radiotherapy head includes a stereotactic radiotherapy head and / or a conformal intensity-modulated radiotherapy head.

[0020] In some embodiments, when the rotating frame includes the first mounting portion and the second mounting portion, the radiotherapy head includes a multiplexed X-ray source, a first collimator, and a second collimator. The multiplexed X-ray source is used to emit X-rays and is mounted on the first mounting portion; the first collimator is used to limit the X-ray beam and is mounted on the second mounting portion; the second collimator is used to limit the X-ray beam and is mounted on the second mounting portion.

[0021] In some embodiments, the first collimator is a channel collimator, and the second collimator is a single-layer or multi-layer multi-leaf collimator.

[0022] In some embodiments, the multiplexed radiation source is an X-ray source.

[0023] In some embodiments, the swing axis passes through the isocenter point of the radiotherapy device.

[0024] In some embodiments, the radiotherapy apparatus further includes an imaging device comprising an imaging source and an imager, the imaging source and the imager being mounted on the rotating frame.

[0025] In another aspect, this disclosure provides an imaging device:

[0026] In some embodiments, the imaging device includes an imaging apparatus and a frame as described in any of the above embodiments, the imaging apparatus including an imaging source and an imager, the imaging source and the imager being mounted on the rotating frame. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0028] Figure 1 is a structural diagram of a rack according to some embodiments (the fixed frame is not swinging);

[0029] Figure 2 is another structural diagram of the rack according to some embodiments (fixed frame swing setting angle);

[0030] Figure 3 is a schematic diagram of two treatment planes formed before and after the swing of the fixation frame according to some embodiments;

[0031] Figure 4A is a BB cross-sectional view of the structure in Figure 12;

[0032] Figure 4B is a schematic diagram of the fixed frame and the rotating frame according to some embodiments, located at the first extreme position and the second extreme position, respectively;

[0033] Figure 5 is another structural diagram of the rack according to some embodiments (the fixed frame is not swinging);

[0034] Figure 6 is another structural diagram of the rack according to some embodiments (fixed frame swing setting angle);

[0035] Figure 7 is a schematic diagram of the fit between the base and the turntable according to some embodiments;

[0036] Figure 8 is a structural diagram of the base according to some embodiments;

[0037] Figure 9 is a cross-sectional view (AA) of the structure in Figure 7;

[0038] Figure 10 is another structural diagram of the rack according to some embodiments;

[0039] Figure 11 is a side view of the structure in Figure 10;

[0040] Figure 12 is a schematic diagram of the cooperation of the fixing frame, the first mounting part and the second mounting part according to some embodiments;

[0041] Figure 13 is another structural diagram of the rack according to some embodiments;

[0042] Figure 14 is a structural diagram of a radiotherapy device according to some embodiments;

[0043] Figure 15 is a structural diagram of an imaging device according to some embodiments. Detailed Implementation

[0044] The technical solutions in some embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this disclosure are within the scope of protection of this disclosure.

[0045] 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 interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0046] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0047] The terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0048] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections. They can refer to direct connections or indirect connections via an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0049] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0050] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0051] In related technologies, for stereotactic radiotherapy, the radiotherapy head is mounted on a rotating frame within the gantry and rotates together with the frame to deliver radiotherapy to the target site of the tumor patient. Because the rotating frame rotates around a fixed axis of rotation, the radiotherapy head also rotates around a fixed axis of rotation. Therefore, for a given radiation source within the radiotherapy head, the emitted beam remains within the same treatment plane throughout one rotation. The beam emitted by the radiation source passes through the skin surrounding the target site to irradiate the target. Because radiotherapy is a continuous process, the skin irradiated by the beam is exposed for a relatively long time, resulting in significant damage.

[0052] To solve the above problems, as shown in Figure 1, this disclosure provides a frame 01, which includes a frame body 100. The frame body 100 includes a fixed frame 1 and a rotating frame 2. The fixed frame 1 swings around the swing axis 3 (in the direction of the solid arrow 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. As shown in Figure 2, the rotation axis 24 of the rotating frame 2 intersects the swing axis 3.

[0053] For example, as shown in Figure 2, the rotating frame 2 can be a ring frame, and the axis of the rotating frame 2 is its rotation axis 24 relative to the fixed frame 1. The inner cavity of the rotating frame 2 forms a treatment cavity 21 for treatment. The rotating frame 2 is used to mount the radiotherapy head 4 and can drive the radiotherapy head 4 to rotate within a 360° range around its rotation axis 24. The patient 5 lies on the treatment bed 6 and is placed 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.

[0054] Based on this, when the fixed frame 1 can swing around the swing axis 3, and the rotating frame 2 swings synchronously with the fixed frame 1 around the swing axis 3, when the fixed frame 1 is in the state shown in Figure 1, for any target radiation source in the radiotherapy head 4 set on the rotating frame 2, the rotating frame 2 drives the radiotherapy head 4 to rotate, and the contour line of the treatment plane of the target radiation source is the first contour line 7 shown in Figure 3. When the fixed frame 1 swings around the swing axis 3 by a set angle and is in the state shown in Figure 2, the rotating frame 2 drives the radiotherapy head 4 to rotate, and the contour line of the treatment plane of the target radiation source is the second contour line 8 shown in Figure 3.

[0055] 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.

[0056] Obviously, if the first treatment plane and the second treatment plane are not coplanar, then the target radiation source will shine on the target point from the skin at different locations.

[0057] Therefore, it can be seen that during the treatment process, since the time required for radiotherapy to the same target point is fixed, the treatment plane of a certain target radiation source in the radiotherapy head 4 can be changed by swinging the fixing frame 1 and rotating the frame 2, so that the radiation used for radiotherapy can pass through the skin at more locations and irradiate the target point. In this way, the time for irradiating the skin at the same location will be shortened, and the degree of damage to the skin by the radiation will also be reduced.

[0058] It should be noted that the aforementioned treatment plane refers to the area touched by the radiation beam emitted by the target radiation source in the radiotherapy head 4 during its rotation around the axis of rotation 24.

[0059] In addition, in order to ensure that the radiation emitted by the target radiation source in the radiotherapy head 4 mounted on the rotating frame 2 can still irradiate the target point of the patient 5 after the fixed frame 1 swings synchronously around the swing axis 3, in some cases, it may be necessary to move the treatment bed 6 to ensure that the radiation emitted by the target radiation source in the radiotherapy head 4 can irradiate the target point of the patient 5.

[0060] To facilitate the setup of the frame 01, in some embodiments, the swing axis 3 can be set perpendicular to the rotation axis 24 of the rotating frame 2. In this case, the swing axis 3 lies in a plane perpendicular to the rotation axis 24.

[0061] Furthermore, in some embodiments of this disclosure, in order to enable the patient 5 to be treated with different radiotherapy heads 4, it may be necessary to provide at least two different types of radiotherapy heads 4 on the rotating frame 2. In this case, to reduce the weight that the entire gantry 01 needs to bear, as shown in FIG4A, 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 fixed frame 1, and the first mounting portion 22 is used to mount the multiplexed X-ray source 9. The second mounting portion 23 is used to mount a first collimator 10 and a second collimator 20. The first mounting portion 22 and the second mounting portion 23 are movable relative to each other, and when the first collimator 10 or the second collimator 20 is docked with the multiplexed X-ray source 9, the first mounting portion 22 and the second mounting portion 23 can also rotate synchronously relative to the fixed frame 1 about the rotation axis 24 of the rotating frame 2.

[0062] Based on this, during the movement of the first mounting part 22 relative to the second mounting part 23, the first collimator 10 and the multiplexed X-ray source 9 can be docked to form a radiotherapy head, and the second collimator 20 can also be docked with the multiplexed X-ray source 9 to form another radiotherapy head. In this way, although the radiotherapy equipment using the gantry 01 provided in this disclosure has two radiotherapy heads, because the two radiotherapy heads can share a single multiplexed X-ray source 9, the total weight of the two radiotherapy heads is effectively reduced, thereby reducing the weight borne by the gantry 01.

[0063] For example, the aforementioned multiplexed radiation source 9 can be an X-ray source, specifically an X-ray accelerator. The aforementioned first collimator 10 can be a channel collimator, and the second collimator 20 can 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, the specific structures and working processes of X-ray accelerators, channel collimators, single-layer multi-leaf collimators, and multi-layer multi-leaf collimators will not be described in detail here.

[0064] The following is an example illustrating the movement of the first mounting part 22 relative to the second mounting part 23. For example, the first mounting part 22 may rotate relative to the second mounting part 23 around the rotation axis 24 of the rotating frame 2, that is, the second mounting part 23 is fixed and only the first mounting part 22 is controlled to rotate. In this case, during the rotation of the first mounting part 22, the first collimator 10 or the second collimator 20 may be docked with the multiplexed X-ray source 9.

[0065] Alternatively, the second mounting part 23 can rotate relative to the first mounting part 22 around the rotation axis 24 of the rotating frame 2, that is, the first mounting part 22 is fixed and only the second mounting part 23 is controlled to rotate. In this way, during the rotation of the second mounting part 23, the first collimator 10 or the second collimator 20 can be docked with the multiplexed X-ray source 9.

[0066] Alternatively, the first mounting part 22 and the second mounting part 23 can rotate around the rotation axis 24 of the rotating frame 2 at different speeds and / or in different directions. For example, if the first mounting part 22 rotates counterclockwise around the rotation axis 24 of the rotating frame 2, the second mounting part 23 can rotate clockwise around the rotation axis 24 of the rotating frame 2. In this case, during the rotation of the first mounting part 22 and the second mounting part 23, the first collimator 10 or the second collimator 20 can be docked with the multiplexed X-ray source 9. Alternatively, the first mounting part 22 and the second mounting part 23 can rotate in the same direction, but with different angular velocities. In this case, during the rotation of the first mounting part 22 and the second mounting part 23, the first collimator 10 or the second collimator 20 can also be docked with the multiplexed X-ray source 9.

[0067] In some embodiments, the first mounting part 22 and the second mounting part 23 can also achieve relative movement through sliding engagement. For example, a slide rail can be provided between the first mounting part 22 and the second mounting part 23. The first mounting part 22 can be fixed and the second mounting part 23 can slide relative to the first mounting part 22 along the slide rail. Alternatively, the second mounting part 23 can be fixed and the first mounting part 22 can slide relative to the second mounting part 23 along the slide rail. As long as it is ensured that the first collimator 10 and the second collimator 20 can dock with the multiplexed X-ray source 9 during the relative sliding process of the first mounting part 22 and the second mounting part 23, it is acceptable.

[0068] In some embodiments, the first mounting portion 22 may be a ring frame or a C-frame, and / or the second mounting portion 23 may be a ring frame or a C-frame. For example, as shown in FIG4A, both the first mounting portion 22 and the second mounting portion 23 are ring frames, and the second mounting portion 23 is at least partially located within the first mounting portion 22. The first collimator 10 and the second collimator 20 are mounted on the portion of the second mounting portion 23 located within the first mounting portion 22.

[0069] In some embodiments, the first mounting part 22 may also be a C-shaped frame, and the second mounting part 23 may also be a C-shaped frame. This disclosure does not limit the specific shape of the first mounting part 22 and the second mounting part 23.

[0070] To prevent the rotating frame 2 or its components from interfering with the treatment bed 6 or the patient 5 lying on it after the rotating frame 2 and the fixed frame 1 swing synchronously around the swing axis 3, in the embodiments of this disclosure, 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 Figure 4B, the fixed frame 1 and the rotating frame 2 can swing together from the first extreme position a1 to the second extreme position a2 by α°, where the value of α is 80°. Of course, -40° to +40° is the extreme range of swing angle for the fixed frame 1 and the rotating frame 2. In some embodiments, the swing angle range of the fixed frame 1 and the rotating frame 2 only needs to be within the range of -40° to +40°, such as -35° to +35°, or -30° to +30°, all of which can be used.

[0071] In the embodiments of this disclosure, the rotating frame 2 rotates clockwise or counterclockwise around the rotation axis 24. That is, the rotating frame 2 can rotate either clockwise or counterclockwise around the rotation axis 24, depending on the actual situation. In some embodiments, the rotating frame 2 may also be able to rotate only clockwise or only counterclockwise around the rotation axis 24, both of which are acceptable.

[0072] In the embodiments of this disclosure, as shown in FIG5, the frame 01 may further include a base 30, which is disposed at the bottom of the frame body 100. The fixed frame 1 is rotatably connected to the base 30, and the fixed frame 1 swings relative to the base 30 about the swing axis 3. The swing mode of the fixed frame 1 relative to the base 30 will be described below.

[0073] For example, the rotational fit between the fixed frame 1 and the base 30 is explained using the example of the swing axis 3 extending along the X direction shown in Figure 1. As shown in Figure 7, a turntable 40 is rotatably mounted on the base 30, and the turntable 40 is rotatably mounted on the base 30 via a first bearing 50 as shown in Figure 9. Specifically, as shown in Figure 8, the base 30 is provided with a base mounting hole 301, the axis of which is collinear with the swing axis 3. As shown in Figure 9, the turntable 40 and the first bearing 50 are installed in the base mounting hole 301. The turntable 40 includes a large-diameter section 401 and a small-diameter section 402 extending along the X direction. The large-diameter section 401 and the small-diameter section 402 are coaxial, and the large-diameter section 401 is located above the small-diameter section 402. The adjacent area of ​​the large-diameter section 401 and the small-diameter section 402 forms a downward-facing turntable step surface.

[0074] In this way, the outer ring of the first bearing 50 is interference-fitted with the wall of the mounting hole 301 in the base, the outer circumferential surface of the small diameter section 402 of the turntable 40 is interference-fitted with the inner ring of the first bearing 50, the stepped surface of the turntable is supported on the end face of the first bearing 50 facing the large diameter section 401, and the other end face of the first bearing 50 is in contact with the bottom of the mounting hole 301 in the base, thereby enabling the turntable 40 to rotate relative to the base 30 around its axis.

[0075] The above is just an example. The fixed frame 1 and the base 30 can also be rotatably connected in other ways. For example, the fixed frame 1 and the base 30 can be connected by a rotating shaft. The rotating shaft passes through the fixed frame 1 and the base 30. The axis of the rotating shaft is collinear with the swing axis 3. The fixed frame 1 can swing around the rotating shaft.

[0076] Furthermore, when the fixed frame 1 is a ring frame, since it is inconvenient to fix the fixed frame 1 to the turntable 40, as shown in Figures 5 and 6, a mounting plate 60 is welded and fixed to the lower side of the fixed frame 1. The fixed frame 1 is fixed to the turntable 40 by the mounting plate 60 and the matching fastening bolts 70, so that the fixed frame 1 can be mounted on the turntable 40, thereby enabling the fixed frame 1 to rotate relative to the base 30 along with the turntable 40. In this way, the fixed frame 1 is rotatably connected to the base 30, and the base 30 can both support the fixed frame 1 and rotate relative to the fixed frame 1, resulting in better overall stability of the frame 01.

[0077] Based on this, to further improve the stability of the frame 01, as shown in Figures 10 and 11, the frame 01 also includes a support frame 80, which is rotatably connected to the fixed frame 1 and is used to support the frame body 100. The support frame 80 is rotatably connected to the fixed frame 1, and the rotation axis of the support frame 80 and the fixed frame 1 are collinear with the swing axis 3. Therefore, when the fixed frame 1 swings around the swing axis 3, the base 30 supports the fixed frame 1, and the support frame 80 supports the fixed frame 1, thus making the entire frame 01 more stable when the fixed frame 1 swings.

[0078] As exemplarily shown in Figures 10 and 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 frame body 100 and is rotatably connected to the fixed frame 1. The fixed frame 1 swings relative to the support frame 80 about the swing axis 3. The plurality of support columns 802 are disposed below the top plate 801 for supporting the top plate 801.

[0079] As shown in Figures 10 and 11, a connecting rod 90 is welded and fixed to the top of the fixed frame 1. The axis of the connecting rod 90 is collinear with the swing axis 3. The connecting rod 90 is rotatably connected to the top plate 801, thereby realizing the rotatable connection between the fixed frame 1 and the top plate 801.

[0080] In some embodiments, the frame 01 further includes a drive device for driving the rotating frame 2 to rotate relative to the fixed frame 1, and for driving the rotating frame 2 and the fixed frame 1 to swing synchronously about the swing axis 3. The following describes how the drive device specifically drives the fixed frame 1 and the rotating frame 2 to move.

[0081] For example, in some embodiments, as shown in Figures 10 and 11, the driving device may include a first drive motor 200, which is fixed to the lower side of the top plate 801 with its output shaft facing downwards. 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 drive motor 200 is connected to the connecting rod 90 in a transmission manner and can drive the connecting rod 90 to rotate about its axis, thereby driving the fixed frame 1 to rotate. In some embodiments, the first drive motor 200 may also be replaced by other drive mechanisms, such as a hydraulic motor, which can also be used.

[0082] In addition, in some embodiments, as shown in FIG12, the driving device further includes a second driving motor 300, which is used to drive the rotating frame 2 to rotate around the rotation axis 24. Specifically, the following describes the second driving motor 300 driving the rotating frame 2 to rotate, taking the first mounting part 22, the second mounting part 23 and the fixed frame 1 as an example of a ring frame.

[0083] As shown in Figure 12, the first mounting part 22 is rotatably mounted inside the fixed frame 1, and the second mounting part 23 is also rotatably mounted inside the fixed frame 1. The second mounting part 23 also passes through the inner cavity of the first mounting part 22. The fixed frame 1, the first mounting part 22, and the second mounting part 23 are concentrically arranged, meaning their structural axes are collinear. This structural axis also constitutes the rotation axis 24 of the first mounting part 22 and the second mounting part 23. The following explains how the first mounting part 22 and the second mounting part 23 are mounted on the fixed frame 1.

[0084] As shown in Figure 12, two first mounting seats 400 can be provided in the inner cavity of the fixed frame 1. The two first mounting seats 400 are arranged at intervals along the axial direction of the fixed frame 1. The two first mounting seats 400 are provided with mounting holes coaxial with the fixed frame 1. Second bearings 500 are installed in the mounting holes. The first mounting part 22 is rotatably mounted on the two first mounting seats 400 around its structural axis through the two second bearings 500, thereby realizing rotatable mounting in the fixed frame 1.

[0085] In addition, as shown in Figure 12, two second mounting seats 600 can be provided in the inner cavity of the fixing frame 1. The two second mounting seats 600 are arranged at intervals along the axial direction of the fixing frame 1 and are located on opposite sides of the two first mounting seats 400. The two second mounting seats 600 are provided with mounting holes coaxial with the fixing frame 1. A third bearing 700 is installed in the mounting hole. The second mounting part 23 is rotatably mounted on the two second mounting seats 600 through the two third bearings 700 around its structural axis, thereby realizing rotatable mounting in the fixing frame 1.

[0086] In addition, in order to drive the second mounting part 23 to rotate, as shown in FIG12, a drive gear 800 is fixedly mounted on one end of the second mounting part 23, and a fixed gear 900 that meshes with the drive gear 800 is provided on the output shaft of the second drive motor 300. The second drive motor 300 drives the second mounting part 23 to rotate through the fixed gear 900 and the drive gear 800.

[0087] Based on this, in order to drive the first mounting part 22, as shown in FIG12, a first annular protrusion 1000 is provided at one end of the second mounting part 23 near the drive gear 800, and a second annular protrusion 2000 is provided at the end of the first mounting part 22 corresponding to the first annular protrusion 1000. After the first mounting part 22 and the second mounting part 23 are installed, the first annular protrusion 1000 and the second annular protrusion 2000 fit together in the axial direction of the fixing frame 1.

[0088] Based on this, as shown in Figure 12, the first annular protrusion 1000 and the second annular protrusion 2000 are respectively provided with connecting holes extending along the axial direction of the fixing frame 1. The pin 3000 can be inserted into the corresponding connecting holes on the first annular protrusion 1000 and the second annular protrusion 2000 at the same time to realize the anti-rotation of the first mounting part 22 and the second mounting part 23. Then, when the second drive motor 300 drives the second mounting part 23 to rotate, it can simultaneously drive the first mounting part 22 to rotate. That is, the second drive motor 300 can drive the first mounting part 22 and the second mounting part 23 to rotate synchronously around the rotation axis 24.

[0089] Furthermore, to prevent the pin 3000 from coming out of the connecting hole during use, as shown in Figure 12, a retainer 30001 is provided at one end of the pin 3000. A through hole is provided on the retainer 30001, and a threaded hole is provided on the first annular protrusion 1000 corresponding to the through hole. A fixing bolt 4000 is used to pass through the through hole and screw into the threaded hole to press and fix the retainer 30001 on the first annular protrusion 1000.

[0090] To facilitate the installation of the pin 3000, a clearance hole (not shown in the figure) is provided on the second mounting base 600 at the position corresponding to the connecting hole on the first annular protrusion 1000. The clearance hole allows the operator's hand to pass through to install the pin 3000.

[0091] As described above, to facilitate the installation of the first mounting part 22 and the second mounting part 23, as shown in Figure 4A, the fixing frame 1 is divided into an upper ring frame 11 and a lower ring frame 12 by the horizontal plane containing its axis. Correspondingly, the first mounting base 400 and the second mounting base 600 are also divided into upper and lower parts by the same horizontal plane. In this case, the upper parts of the first mounting base 400 and the second mounting base 600 can be fixed to the upper ring frame 11, and the lower parts of the first mounting base 400 and the second mounting base 600 can be fixed to the lower ring frame 12.

[0092] Furthermore, the upper part 11 and the lower part 12 of the ring frame are respectively provided with mounting ears 13. The corresponding mounting ears 13 are fixed together by locking bolts 14 and locking nuts 15 to fix the upper part 11 and the lower part 12 of the ring frame together. It should be noted that there are multiple pairs of corresponding mounting ears 13 along the axial direction of the fixing frame 1, and multiple pairs are provided on both sides of the fixing frame 1 to improve the fixing reliability of the upper part 11 and the lower part 12 of the ring frame. When assembling the frame 01, the first mounting part 22, the second mounting part 23, the second bearing 500 and the third bearing 700 are first installed on the lower part 12 of the ring frame, and then the upper part 11 of the ring frame is fixed on the lower part 12 of the ring frame.

[0093] In some embodiments, the fixing frame 1 may not be a ring frame. As shown in FIG13, the fixing frame 1 can be a C-shaped frame, including two parallel support plates 16 and a connecting plate 17 connecting the two support plates 16. The two support plates 16 are arranged in the vertical direction, and the lower support plate 16 is rotatably connected to the base 30, thereby realizing the swing of the fixing frame 1. The rotating frame 2 is disposed between the two support plates 16 and is rotatably mounted on the lower support plate 16, and can also be used.

[0094] In some embodiments, the first mounting part 22 may also have a separate drive mechanism. For example, the first mounting part 22 is rotatably mounted in the inner cavity of the fixed frame 1, and a first power gear is provided at the end of the first mounting part 22 and driven by a first power motor with an adapter gear on the output shaft. The second mounting part 23 is rotatably mounted in the inner cavity of the first mounting part 22, and a second power gear is provided at the end of the second mounting part 23 and driven by a second power motor with an adapter gear on the output shaft. The second power motor is fixed in the inner cavity of the first mounting part 22. The second power motor is only used to drive the second mounting part 23 to rotate relative to the first mounting part 22. When the rotating frame 2 needs to rotate as a whole, the second power motor stops operating, and the first power motor starts operating to drive the entire rotating frame 2 to rotate relative to the fixed frame 1.

[0095] This disclosure also provides a radiotherapy device, as shown in FIG1, which includes the aforementioned gantry 01 and a radiotherapy head, the radiotherapy head being mounted on a rotating frame 2 within the gantry 01. This radiotherapy device includes the aforementioned gantry 01, thus solving the same technical problem and achieving the same technical effect, which will not be elaborated further here.

[0096] In some embodiments, as shown in FIG14, the radiotherapy head may include a stereotactic 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 circumferentially around the rotating frame 2. When using the radiotherapy device, the operator can select one or both of the stereotactic treatment head 41 and the conformal intensity-modulated treatment head 42 to treat the patient 5 according to the specific condition of the patient 5, making the treatment more targeted and effective, and also making the radiotherapy device more adaptable.

[0097] In some embodiments, the radiotherapy head may also include only one of the stereotactic radiotherapy head 41 and the conformal intensity-modulated radiotherapy head 42, and can still be used. Of course, other types of radiotherapy heads can also be used.

[0098] 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 entire frame 01 needs to bear, as shown in FIG4A, the rotating frame 2 includes a first mounting part 22 and a second mounting part 23. The first mounting part 22 is rotatably mounted on the fixed frame 1. The first mounting part 22 and the second mounting part 23 can move relative to each other, and the first mounting part 22 and the second mounting part 23 can also rotate synchronously relative to the fixed frame 1 about the rotation axis 24 of the rotating frame 2. The radiotherapy head may include a multiplexed X-ray source 9, a first collimator 10 and a second collimator 20. The multiplexed X-ray source 9 is used to emit X-rays and is mounted on the first mounting part 22. The first collimator 10 is used to limit the X-ray beam and is mounted on the second mounting part 23; the second collimator 20 is used to limit the X-ray beam and is mounted on the second mounting part 23.

[0099] Based on this, during the movement of the first mounting part 22 relative to the second mounting part 23, the first collimator 10 and the multiplexed X-ray source 9 can be docked to form a radiotherapy head, and the second collimator 20 can also be docked with the multiplexed X-ray source 9 to form another radiotherapy head. In this way, the rotating frame 2 is effectively equipped with two radiotherapy heads, but because the two radiotherapy heads share a single multiplexed X-ray source 9, the weight borne by the frame 01 is reduced.

[0100] For example, the multiplexed radiation source 9 mentioned above is an X-ray source, specifically an X-ray accelerator. An X-ray accelerator generally includes components such as an electron gun, an accelerating tube, a tungsten target, and a microwave feed device. Since X-ray accelerators are a mature existing technology, their specific structure and working process will not be described in detail here.

[0101] The first collimator 10 mentioned above can be a channel collimator. A channel collimator can include multiple beam channels with different apertures, or a single beam channel with adjustable shape and size (aperture). It can also include only one channel with non-adjustable size (aperture) and shape. The channel collimator is used to generate a single narrow X-ray beam. The channel collimator is a mature existing technology (also called a beam limiter), and its specific structure and working process will not be described in detail here.

[0102] The aforementioned 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 radiation field with the same shape and size as the tumor. The multi-leaf collimator is a mature existing technology, and its specific structure and working process will not be described in detail here.

[0103] In some embodiments, the multiplexed radiation source 9 can also be other types of radiation sources, such as a cobalt-60 radiation source. The first collimator 10 and the second collimator 20 can 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.

[0104] To ensure that the treatment plane generated by the target radiation source in the radiotherapy head still passes through the isocenter of the radiotherapy equipment after the fixation frame 1 swings, the swing axis 3 of the fixation frame 1 is set to pass through the isocenter of the radiotherapy equipment. The isocenter is the intersection of the center line of the radiation beam emitted by the target radiation source in the radiotherapy head and the rotation axis 24 of the rotating frame 2. By setting the swing axis 3 to pass through the isocenter, the center line of the radiation beam emitted by the target radiation source in the radiotherapy head will still pass through the isocenter after the fixation frame 1 swings. During normal use, the treatment bed 6 will move the patient 5 into the treatment chamber 21, placing the patient's target point at the isocenter. In this way, after the fixation frame 1 swings, the treatment bed 6 does not need to move, and the radiation emitted by the target radiation source in the radiotherapy head can still irradiate the patient's target point, reducing the operational difficulty and complexity of the radiotherapy equipment.

[0105] It should be noted that the target radiation source refers to the radiation source selected for treatment within the radiotherapy head during the radiotherapy process. If the radiotherapy head has only one radiation source, then that radiation source is the target radiation source; if the radiotherapy head has multiple radiation sources, then any one of the multiple radiation sources can be the aforementioned target radiation source.

[0106] In some embodiments, as shown in FIG4A, the radiotherapy apparatus further includes an imaging device comprising an imaging source 5000 and an imager 6000, which are mounted on a rotating frame 2. The imaging device is used to achieve high-precision patient positioning before treatment and real-time monitoring of treatment.

[0107] For example, as shown in FIG4A, the rotating frame 2 includes a first mounting part 22 and a second mounting part 23. The imaging source 5000 and the imager 6000 are both mounted on the second mounting part 23, and the imaging source 5000 and the imager 6000 are arranged symmetrically about the isocenter point of the radiotherapy equipment.

[0108] For example, the imaging source 5000 can be a KV-level X-ray tube capable of emitting a cone-shaped beam, and the imager 6000 can be a flat panel detector or an arc-shaped plate detector for receiving the cone-shaped beam emitted by the X-ray tube and forming the shape and state of the patient's tumor.

[0109] This disclosure also provides an imaging device, as shown in FIG15. The imaging device includes the aforementioned frame 01 and imaging apparatus. The imaging apparatus includes an imaging source 5000 and an imager 6000, which are mounted on a rotating frame 2. It should be noted that when arranging the imaging source 5000 and imager 6000, the intersection points of the imaging source 5000 and imager 6000 about the rotation axis 24 and the swing axis 3 of the rotating frame 2 should be symmetrical. The imaging device is used to achieve high-precision patient positioning before treatment and real-time monitoring of treatment during treatment.

[0110] The area covered by the rays emitted by the imaging source 5000 during the rotation of the rotating frame 2 is defined as the imaging plane. Since the fixed frame 1 can swing around the swing axis 3 and the rotating frame 2 can swing synchronously with the fixed frame 1 around the swing axis 3, the imaging device will obtain a new imaging plane after the fixed frame 1 and the rotating frame 2 swing synchronously. Thus, the imaging device can image the tumor of the patient 5 from different angles.

[0111] For example, as shown in FIG4A, when the rotating frame 2 includes a first mounting part 22 and a second mounting part 23, both the imaging source 5000 and the imager 6000 are mounted on the second mounting part 23.

[0112] For example, the imaging source 5000 can be a KV-level X-ray tube capable of emitting a cone-shaped beam, and the imager 6000 can be a flat panel detector or an arc-shaped plate detector for receiving the cone-shaped beam emitted by the X-ray tube and forming the shape and state of the patient's tumor.

[0113] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A rack, characterized in that, The frame includes a frame body, which includes: a fixed frame that swings about a swing axis; and a rotating frame that is rotatably mounted on the fixed frame and swings synchronously with the fixed frame about the swing axis. The rotation axis of the rotating frame intersects the swing axis. The rotating frame includes: a first mounting part that is rotatably mounted on the fixed frame for mounting a multiplexed X-ray source; and a second mounting part for mounting a first collimator and a second collimator. The first mounting part and the second mounting part are movable relative to each other. When the first collimator or the second collimator is docked with the multiplexed X-ray source, the first mounting part and the second mounting part can also rotate synchronously relative to the fixed frame about the rotation axis.

2. The frame according to claim 1, characterized in that, The swing axis is perpendicular to the rotation axis of the rotating frame.

3. The frame according to claim 1, characterized in that, 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 speeds and / or in different directions.

4. The frame according to claim 1, characterized in that, The first mounting part is a ring frame or a C-shaped frame, and / or the second mounting part is a ring frame or a C-shaped frame.

5. The frame according to claim 1, characterized in that, The rotating frame also includes a locking structure that locks the first mounting portion and the second mounting portion.

6. The frame according to claim 1, characterized in that, The rotating frame and the fixed frame oscillate synchronously around the swing axis within the range of -40° to +40°.

7. The frame according to claim 1, characterized in that, The rotating frame rotates counterclockwise or clockwise around the rotation axis.

8. The frame according to claim 1, characterized in that, The frame also includes a base disposed at the bottom of the frame body, the fixed frame is rotatably connected to the base, and the fixed frame swings relative to the base about the swing axis.

9. The frame according to claim 1, characterized in that, The frame also includes a support frame, which is rotatably connected to the fixed frame and is used to support the frame body.

10. The frame according to claim 9, characterized in that, The support frame includes: a top plate, disposed on the top of the frame body and rotatably connected to the fixed frame, the fixed frame swinging about the swing axis relative to the support frame; and a plurality of support columns, disposed below the top plate for supporting the top plate.

11. The frame according to claim 1, characterized in that, The frame further includes a drive device for driving the rotating frame to rotate relative to the fixed frame, and for driving the rotating frame and the fixed frame to swing synchronously around the swing axis.

12. A radiotherapy device, characterized in that, The radiotherapy device includes a radiotherapy head and a gantry as described in any one of claims 1-11, wherein the radiotherapy head is disposed on the rotating gantry.

13. The radiotherapy device according to claim 12, characterized in that, The radiotherapy head includes a stereotactic radiotherapy head and / or a conformal intensity-modulated radiotherapy head.

14. The radiotherapy device according to claim 12, characterized in that, In the case where the rotating frame includes the first mounting portion and the second mounting portion, the radiotherapy head includes: a multiplexed X-ray source for emitting X-rays, mounted on the first mounting portion; a first collimator for limiting the X-ray beam, mounted on the second mounting portion; and a second collimator for limiting the X-ray beam, mounted on the second mounting portion.

15. The radiotherapy device according to claim 14, characterized in that, The first collimator is a channel collimator, and the second collimator is a single-layer or multi-layer multi-leaf collimator.

16. The radiotherapy device according to claim 14, characterized in that, The multiplexed radiation source is an X-ray source.

17. The radiotherapy device according to claim 12, characterized in that, The swing axis passes through the isocenter point of the radiotherapy equipment.

18. The radiotherapy device according to claim 12, characterized in that, The radiotherapy equipment also includes an imaging device, which comprises an imaging source and an imager, the imaging source and the imager being mounted on the rotating frame.

19. An imaging device, characterized in that, The imaging device includes an imaging apparatus and a frame as described in any one of claims 1-11, the imaging apparatus including an imaging source and an imager, the imaging source and the imager being mounted on the rotating frame.

Images