Radiotherapy system

Abstract

The utility model discloses a radiotherapy system which comprises a rack and at least two treatment head groups located on the rack, and each treatment head group comprises at least two treatment heads. The rack can drive the treatment heads of the at least two treatment head sets to rotate around the rotation center of the rack, and beams emitted by the treatment heads of the at least two treatment head sets intersect at the isocenter. Wherein the beam centers of at least two treatment heads in each treatment head group and the rotation center of the rack are in the same plane; and the beam centers of the treatment heads in different treatment head groups are in different planes. Therefore, high-dose-rate non-coplanar irradiation treatment can be realized through rotation of the rack.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a radiotherapy system. Background Technology

[0002] Radiation therapy is one of the three main methods of treating tumors, and about 65-70% of cancer patients receive radiation therapy to varying degrees.

[0003] Existing common radiotherapy equipment includes a rotatable gantry and a treatment head mounted on the gantry, with the gantry carrying the treatment head rotating along the gantry's axis of rotation. This method can only provide coplanar irradiation and cannot provide non-coplanar treatment. In contrast, the existing Gamma Knife includes multiple radiation sources, with the rays emitted from these sources focused at a single point. By rotating the device, it can provide non-coplanar irradiation treatment, but its irradiation time is longer. Utility Model Content

[0004] This invention provides a radiotherapy system that can achieve high dose rate non-coplanar irradiation, thereby shortening treatment time and improving treatment efficacy.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A radiotherapy system includes a gantry and at least two treatment head assemblies located on the gantry, each treatment head assembly including at least two treatment heads; the gantry can drive the treatment heads of the at least two treatment head assemblies to rotate around the gantry's rotation center, and the beams emitted from the treatment heads of the at least two treatment head assemblies intersect at an isocenter; wherein, the beam centers of at least two treatment heads in each treatment head assembly and the gantry's rotation center are on the same plane; the beam centers of the treatment heads in different treatment head assemblies are on different planes.

[0007] In some embodiments, the beam center of the treatment head in the first treatment head group of at least two treatment head groups is on a plane perpendicular to the gantry rotation axis.

[0008] In some embodiments, at least two treatment heads of the second treatment head group in at least two treatment head groups are located on either side of the vertical plane of the gantry rotation center, which is at the isocentric center.

[0009] In some embodiments, the radiotherapy system includes two treatment head groups, each treatment head group including two treatment heads.

[0010] In some embodiments, the projections of the four treatment heads of the radiotherapy system onto the vertical plane of the roller rotation axis are evenly distributed.

[0011] In some embodiments, the beam direction of at least one treatment head is variable; or, the beam center direction of at least one group of treatment heads is variable; or, the beam center direction of each treatment head is variable.

[0012] In some embodiments, the treatment head is configured to move in a straight line or curve in the direction of the rotation axis to change the direction of the beam center, or the treatment head is configured to be rotatable to change the direction of the beam center axis.

[0013] In some embodiments, the radiotherapy system further includes an imaging device for imaging the target area.

[0014] In some embodiments, the intersection point is located within the imaging range of the imaging device; or, the intersection point coincides with the imaging center of the imaging device; or, the intersection point is at a preset distance from the imaging center of the imaging device.

[0015] In some embodiments, the imaging apparatus includes two imaging devices, each of which includes a ray generator and a ray detector; wherein the rays from the two imaging devices intersect.

[0016] In some embodiments, the beam emitted from the treatment hair is a photon beam, a particle beam, or an electron beam.

[0017] In some embodiments, the treatment hair emits X-rays or gamma rays.

[0018] In some embodiments, the treatment head can perform stereotactic radiotherapy or intensity-modulated radiotherapy.

[0019] In some embodiments, the radiotherapy system further includes a controller for controlling the beam emission from the treatment head; wherein the treatment head is configured to emit beams simultaneously; or, the treatment head is configured to emit beams at least partially simultaneously.

[0020] This application provides a radiotherapy system comprising at least two treatment head groups. In each treatment head group, the beam centers of the two treatment heads and the gantry rotation center are on the same plane. However, the beam centers of the treatment heads in different treatment head groups are on different planes. Treatment heads within the same treatment head group can achieve coplanar irradiation, while different treatment head groups can achieve non-coplanar irradiation, thus eliminating the need for treatment bed oscillation to achieve non-coplanar irradiation. Since each treatment head group includes at least two treatment heads, the radiotherapy system comprises at least four treatment heads. Furthermore, the beams of different treatment heads, compared to isocenter irradiation, allow for high dose rate irradiation, meeting clinical needs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of a radiotherapy system provided in this embodiment of the present invention;

[0023] Figure 2 A front view of a radiotherapy system provided in this embodiment of the present invention;

[0024] Figure 3 This utility model provides a radiotherapy system and a cross-sectional schematic diagram thereof.

[0025] Figure 4 This utility model provides a radiotherapy system and a cross-sectional schematic diagram thereof.

[0026] Figure 5 A side view of a radiotherapy system provided in this embodiment of the present invention;

[0027] Figure 6 A schematic diagram of a radiotherapy system provided in this embodiment of the present invention;

[0028] Figure 7 This utility model provides a schematic diagram of a radiotherapy system.

[0029] Figure label:

[0030] 100 - Radiotherapy system; 10 - gantry; 11a, 11b, 12a, 12b - treatment heads; 13 - treatment bed; 21 - first radiation generator; 22 - first radiation detector; 31 - second radiation generator; 32 - second radiation detector; 101 - treatment unit; 102 - imaging unit. Detailed Implementation

[0031] The technical solution of this utility model will be described in further detail below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0032] This utility model provides a radiotherapy system, including a gantry and at least two treatment head groups located on the gantry, each treatment head group including at least two treatment heads; the gantry can drive the treatment heads of the at least two treatment head groups to rotate around the rotation center of the gantry, and the beams emitted by the treatment heads of the at least two treatment head groups intersect at the same center; wherein, the beam centers of at least two treatment heads in each treatment head group and the rotation center of the gantry are on the same plane; the beam centers of the treatment heads in different treatment head groups are on different planes.

[0033] The type of radiation emitted by the treatment head is not limited in the embodiments of this application. For example, the beam emitted by the treatment head in this application is a photon beam, particle beam, or electron beam. In the embodiments of this application, the example treatment head emits X-rays or gamma rays. For example, the radiation source of the treatment head can be an isotope radiation source, such as cobalt-60, then the source point of the treatment head can be an isotope radiation source, and the beam emitted by the treatment head can be a gamma beam. Alternatively, the treatment head can be an accelerator, which generates an electron beam that strikes a target to emit an X-ray beam.

[0034] The radiotherapy system provided in this embodiment of the invention emits X-rays or gamma rays from the treatment heads. For example, a group of treatment heads may all emit X-rays. Alternatively, a group of treatment heads may all emit gamma rays. Or, two treatment heads in the same group may emit X-rays and gamma rays respectively.

[0035] The structure and type of the gantry are not limited in the embodiments of this application. For example, the gantry can be a roller structure, a C-arm structure, a drum-shaped structure, a robotic arm, etc., as long as the gantry can drive the treatment head to rotate.

[0036] In this embodiment, the beam center of the treatment head is the physical center. For example, when the treatment head is an accelerator, the emitted beam becomes a cone-shaped beam after beam shaping, then the beam center is the center of the cone-shaped beam. When the treatment head includes multiple gamma radiation sources, the beam center of the treatment head is the physical center of the multiple gamma radiation sources. If the multiple gamma radiation sources are distributed circumferentially, the beam center passes through the center of the circle. If the multiple gamma radiation sources are distributed in a rectangular array, the beam center passes through the center of the rectangles (i.e., the intersection of the diagonals of the rectangles).

[0037] In this embodiment of the invention, the radiotherapy system includes at least two treatment head groups. For example, it may include two treatment head groups or three treatment head groups. This application does not limit the number of treatment head groups. Each treatment head group includes at least two treatment heads; it may include two, three, or four treatment heads, and this application does not limit this. This embodiment of the invention uses two treatment head groups, each containing two treatment heads, as an example for illustration.

[0038] In this embodiment, the rotation axis of the gantry is the center of rotation of the gantry. The beams emitted from the treatment heads of at least two treatment head groups intersect at the isocenter and are located on the center of rotation of the drum. The predetermined treatment target area is located at the isocenter to achieve radiotherapy. For example, the radiotherapy system includes at least four treatment head beams intersecting at the intersection point, thereby significantly increasing the dose rate at the intersection point, which can meet the high dose rate requirements of radiotherapy at the intersection point. For example, using a conventional accelerator, the X-ray emitted by one treatment head is approximately 1400 Mu, with a dose rate of approximately 3.5 Gr. If the radiotherapy system includes at least four treatment heads, the dose rate at the intersection point can reach 14 Gr, which meets the high dose rate requirements in clinical practice.

[0039] In this embodiment, the beam centers of the two treatment heads in each treatment head group and the gantry rotation center are on the same plane; the beam centers of the treatment heads in different treatment head groups are on different planes. Therefore, treatment heads in the same treatment head group can achieve coplanar irradiation, while different treatment head groups can achieve non-coplanar irradiation, thus eliminating the need for treatment bed oscillation to achieve non-coplanar irradiation. For example, the beam centers of the treatment heads in different treatment head groups are on different planes, such as the plane formed by the beam centers of the treatment heads in the second treatment head group and at least two treatment heads in the first treatment head group being different.

[0040] This application provides a radiotherapy system comprising at least two treatment head groups, which can achieve non-coplanar irradiation treatment. Each treatment head group includes at least two treatment heads, thus the radiotherapy system comprises at least four treatment heads. Furthermore, the beams of different treatment heads, compared to isocenter irradiation, allow for high-dose irradiation at the isocenter.

[0041] For example, high-dose-rate irradiation therapy can improve local control rates, more effectively kill tumor cells, and thus improve treatment precision. Simultaneously, when isocentric irradiation is performed at a high dose rate, the irradiation time can be significantly shortened, enhancing the biological effects of the treatment. For instance, blood circulation time is approximately 60 seconds. When the irradiation time exceeds the blood circulation time, there is greater damage to functional cells in the blood during treatment. However, when four treatment heads are used to enhance the dose rate at the intersection, if the treatment time is less than 0.5 seconds, damage to functional cells in the blood will be greatly reduced.

[0042] For example, the radiotherapy system provided in this embodiment of the present invention, such as Figure 1As shown, the radiotherapy system 100 includes two treatment head groups, each group comprising two treatment heads. For example, the first treatment head group includes treatment head 11a and treatment head 11b, and the second treatment head group includes treatment head 12a and treatment head 12b. The gantry can rotate treatment heads 11a, 11b, 12a, and 12b around the gantry's rotation center SO. The beams emitted by treatment heads 11a, 11b, 12a, and 12b intersect at the isocenter P. Figure 3 As shown, in the first treatment head group, the beam center S11a of treatment head 11a, the beam center S11b of treatment head 11b, and the gantry rotation center SO are all on the same plane M1. Figure 4 As shown, in the second treatment head group, the beam center S12a of treatment head 12a, the beam center S12b of treatment head 12b, and the gantry rotation center SO are on the same plane M2.

[0043] This embodiment of the invention does not limit the incident angle of each treatment head. For example, in the first treatment head group, the included angle between the beam center S11a of treatment head 11a and the beam center S11b of treatment head 11b can be 180°, 120°, or 90°. Preferably, in this embodiment of the invention, the included angle between the beam centers of two treatment heads in the treatment head group is less than 180°.

[0044] In some embodiments, the beam centers of the four treatment heads of the radiotherapy system are evenly distributed on a plane perpendicular to the center of the drum rotation. For example, such as... Figure 2 As shown, the beam centers of treatment heads 11a, 11b, 12a, and 12b are uniformly distributed at 90° angles to each other. When there are multiple treatment heads, the beam centers of the multiple treatment heads are uniformly distributed on the vertical plane of the drum's rotation center. The embodiments and accompanying drawings of this application are only illustrative examples of a radiotherapy system including four treatment heads.

[0045] For example, in the radiotherapy system provided by this embodiment of the invention, the beam center of the treatment head in the first treatment head group of at least two treatment head groups is on a plane perpendicular to the rotation axis of the gantry.

[0046] For example, in the radiotherapy system provided by this embodiment of the present invention, at least two treatment heads of the second treatment head group in at least two treatment head groups are located on both sides of the vertical plane of the gantry rotation center that is isocentric.

[0047] For example, in the radiotherapy system provided by this embodiment of the present invention, the beams emitted by the two treatment heads in the same treatment head group are opposite each other, so that they can shield or counterweight each other, reducing the space occupied.

[0048] For example, in the radiotherapy system provided by this embodiment of the invention, the beam direction of at least one treatment head is variable. Alternatively, the beam center direction of at least one group of treatment heads is variable. Alternatively, the beam center direction of each treatment head is variable. For example, the radiotherapy system includes two groups of treatment heads, and each group of treatment heads includes two treatment heads. The variable beam direction of at least one treatment head can be any one treatment head, or any two or three treatment heads. The variable beam center direction of each treatment head can be four treatment heads. The variable beam center direction of at least one group of treatment heads can be a first group of treatment heads, or two groups of treatment heads. And the variable beam center direction of one of the treatment head groups can be the beam center direction of one of the two treatment heads.

[0049] For example, in the radiotherapy system provided by this embodiment of the invention, the treatment head is configured to move along a straight line or curve in the direction of the rotation axis to change the direction of the beam center. For example, the treatment head may move along a linear guide or an arc guide under the drive of a drive unit.

[0050] For example, in the radiotherapy system provided by this embodiment of the invention, the treatment head is configured to rotate to change the direction of the beam center. The example treatment head may pivot about a central axis, thereby changing the direction of the beam center without changing its position.

[0051] The radiotherapy system provided in this embodiment allows for the application of different target areas to radiotherapy by changing the beam direction of the treatment head. For example, of the four treatment heads, one head can provide large-area radiotherapy to the target area. Another one or two treatment heads can irradiate one or more localized areas within the target area, thereby achieving localized high-dose radiotherapy.

[0052] The radiotherapy system provided in this embodiment of the invention further includes an imaging device for imaging the target area. In this embodiment, the imaging device can be used for positioning the patient and for real-time image guidance during radiotherapy. This embodiment does not limit the type of imaging device; example imaging devices may be computed tomography (CT), emission computed tomography (ECT), magnetic resonance imaging (MRI), positron emission tomography (PET), or any combination thereof. Example imaging devices may be cone-beam imaging devices, which may include a beam generator and a beam detector. For example, the imaging device includes two imaging units, each including a beam generator and a beam detector; wherein the beams from the two imaging units intersect.

[0053] The radiotherapy system provided in this embodiment of the invention has an intersection point and an imaging center of the imaging device at a preset distance. For example, such as... Figure 5 As shown, the imaging unit 102 (the part formed by the imaging device for imaging) can be arranged side by side with the treatment unit 101 (including the part formed by the treatment head for treatment), and the imaging center K and the intersection point P can have a preset distance D. Thus, the target area is imaged and treated by moving the patient in the imaging unit 102 and the treatment unit 101 via the treatment bed 13.

[0054] In this embodiment of the invention, the imaging device of the radiotherapy system 100 may include a radiation generator and a radiation detector, capable of acquiring two-dimensional images of the target area. For example, such as... Figure 6 As shown, the imaging device of the radiotherapy system 100 can be mounted on a roller frame 10. When the imaging device includes a first ray generator 21 and a first ray detector 22, the frame 10 drives the imaging device to rotate, allowing it to acquire images of the target area from different angles, thereby generating a three-dimensional image of the target area. In this embodiment of the invention, the imaging device includes two sets of intersecting ray imaging devices, which can simultaneously emit beams to generate a three-dimensional image of the target area. For example, as... Figure 7 As shown, the imaging device includes a first ray generator 21 and a first ray detector 22, as well as a second ray generator 31 and a second ray detector 32. The beam emitted by the first ray generator 21 intersects with the beam emitted by the second ray generator 31.

[0055] The radiotherapy system provided in this embodiment of the invention has an intersection point located within the imaging range of the imaging device, or the intersection point coinciding with the imaging center of the imaging device. Therefore, the radiotherapy system can acquire an image of the target area simultaneously with radiotherapy irradiation. This allows for monitoring of the target area during radiotherapy, and adjustment of the target area or beam direction in case of target displacement, to implement precise irradiation treatment. For example,... Figure 6 , Figure 7 As shown, the intersection point P is located within the imaging range and coincides with the imaging center.

[0056] The radiotherapy system provided in this embodiment of the invention allows the treatment head to perform stereotactic radiotherapy or intensity-modulated radiotherapy (IMRT). For example, some treatment heads may perform stereotactic radiotherapy, while others may perform IMRT. Alternatively, all treatment heads may perform either stereotactic or IMRT. For example, the treatment head includes a multi-leaf collimator, which conforms to the shape of the target area through its blades, allowing the beam to pass through. For example, the treatment head includes an aperture collimator, such as an X-knife or CyberKn iFe, which beams the beam into a narrow beam. For example, when multiple treatment heads include aperture collimators, the beams from the multiple treatment heads are focused to achieve stereotactic radiotherapy. For example, the treatment head may also include multiple gamma-ray sources, which are focused at an intersection point to achieve stereotactic radiotherapy.

[0057] In this embodiment, the multi-leaf collimator is a mechanical moving component used to generate a conformal radiation field. It is also known as a multi-leaf grating, multi-leaf aperture, etc., and is widely used in the medical field. Therefore, the specific structure and type of the multi-leaf grating will not be elaborated upon. For example, the multi-leaf collimator can be a single-layer multi-leaf collimator or a double-layer multi-leaf collimator.

[0058] For example, among multiple treatment heads, some treatment heads may be configured to include a multi-leaf collimator to enable conformal intensity-modulated radiotherapy; others may be configured to include an aperture collimator to enable local irradiation of the target area, thereby increasing the local radiation dose.

[0059] For example, among multiple treatment heads, some treatment heads may be configured to include multi-leaf collimators to achieve conformal intensity-modulated radiotherapy; some treatment heads may be configured to include multiple gamma sources to achieve stereotactic radiotherapy. Alternatively, all of the multiple treatment heads may be configured to include multi-leaf collimators to achieve conformal intensity-modulated radiotherapy.

[0060] For example, among multiple treatment heads, some treatment heads may be configured to include a multi-leaf collimator to achieve conformal intensity-modulated radiotherapy; some treatment heads may be configured to include multiple gamma sources to achieve stereotactic radiotherapy; and some treatment heads may be configured to include an aperture collimator so that both the gamma source and the treatment head can irradiate the target area locally, thereby increasing the local radiation dose.

[0061] The radiotherapy system provided in this embodiment of the present invention also includes a controller for controlling the beam output of the treatment head; wherein the treatment head is configured to output beams simultaneously; or, the treatment head is configured to output beams at least partially simultaneously, so as to control the treatment head to perform irradiation therapy according to the different dose requirements of the target area, so as to meet the diverse needs of the target area.

[0062] For example, of the four treatment heads, one is configured to include a multi-leaf collimator for conformal intensity-modulated radiotherapy; two are configured to include aperture collimators to simultaneously irradiate a first local area of ​​the target region, increasing the local radiation dose; and a gamma-ray source simultaneously irradiates a second local area of ​​the target region, increasing the local radiation dose.

[0063] For example, of the four treatment heads, one treatment head is configured to include a multi-leaf collimator for conformal intensity-modulated radiotherapy; two treatment heads are configured to include aperture collimators to simultaneously irradiate a first local area of ​​the target region, increasing the local radiation dose; and one treatment head is configured to include an aperture collimator to simultaneously irradiate a second local area of ​​the target region, increasing the local radiation dose.

[0064] For example, of the four treatment heads, one is configured to include a multi-leaf collimator for conformal intensity-modulated radiotherapy; two are configured to include aperture collimators to simultaneously irradiate a first local area of ​​the target region, increasing the local radiation dose; and one treatment head is configured not to emit a beam when the other three treatment heads are emitting beams.

[0065] This specification uses specific terms to describe embodiments thereof. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different places in this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics in one or more embodiments of this specification can be appropriately combined.

[0066] Furthermore, those skilled in the art will understand that aspects of this specification can be described and illustrated in several patentable ways, including any new and useful combination of processes, machines, products, or substances, or any new and useful improvements thereof. Therefore, aspects of this specification can be implemented entirely in hardware, entirely in software (including firmware, resident software, microcode, etc.), or in a combination of software and hardware implementations, all of which are generally referred to herein as “units,” “modules,” or “systems.” Furthermore, aspects of this specification can take the form of computer program products embodied in one or more computer-readable media, containing computer-readable program code embodied thereon.

[0067] Furthermore, unless expressly stated in the claims, the order of processing elements and sequences, the use of numbers and letters, or other names described in this specification are not intended to limit the order of the processes and methods described herein. Although various examples of utility model embodiments that are currently considered useful have been discussed in the foregoing disclosure, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments; rather, the claims are intended to cover all modifications and equivalent combinations that conform to the substance and scope of the embodiments described herein. For example, while the implementation of the various components described above can be embodied in a hardware device, it can also be implemented as a purely software solution, such as an installation on an existing server or mobile device.

[0068] Similarly, it should be noted that, in order to simplify the description disclosed in this specification and thus aid in the understanding of one or more embodiments of the invention, multiple features may sometimes be grouped into a single embodiment, drawing, or description thereof in the foregoing description of the embodiments. However, the method described in this specification should not be construed as reflecting an intention that the claimed object to be scanned requires more features than expressly recited in each claim. In fact, the embodiments contain fewer features than all the features of the individual embodiments disclosed above.

[0069] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A radiotherapy system, characterized in that, The device includes a rack and at least two treatment head assemblies located on the rack, each treatment head assembly including at least two treatment heads; The frame can drive the treatment heads of the at least two treatment head groups to rotate around the rotation center of the frame, and the beams emitted by the treatment heads of the at least two treatment head groups intersect at the same center; In each treatment head group, the beam centers of at least two treatment heads and the gantry rotation center are on the same plane; the beam centers of the treatment heads in different treatment head groups are on different planes.

2. The radiotherapy system according to claim 1, characterized in that, The beam center of the treatment head in the first treatment head group of the at least two treatment head groups is on a plane perpendicular to the rotation center of the gantry.

3. The radiotherapy system according to claim 1, characterized in that, At least two treatment heads of the second treatment head group of the at least two treatment head groups are located on either side of the vertical plane of the rotation center of the gantry, which is at the isocenter.

4. The radiotherapy system according to claim 1, characterized in that, The radiotherapy system includes two treatment head groups, and each treatment head group includes two treatment heads.

5. The radiotherapy system according to claim 4, characterized in that, At least one treatment head includes a multi-leaf collimator.

6. The radiotherapy system according to claim 4, characterized in that, The four treatment heads of the radiotherapy system are evenly distributed on the vertical plane of the gantry rotation center.

7. The radiotherapy system according to claim 1, characterized in that, The beam center angle between the two treatment heads in the treatment head group is less than 180°.

8. The radiotherapy system according to claim 1, characterized in that, The beam direction of at least one treatment head is variable; or the beam center direction of at least one group of treatment heads is variable; or the beam center direction of each of the treatment heads is variable.

9. The radiotherapy system according to claim 8, characterized in that, The treatment head is configured to move in a straight line or curve in the direction of the rotation axis to change the direction of the beam center, or the treatment head is configured to be rotatable to change the direction of the beam center axis.

10. The radiotherapy system according to claim 1, characterized in that, The radiotherapy system also includes an imaging device for imaging the target area.

11. The radiotherapy system according to claim 1, characterized in that, The radiotherapy system also includes an imaging device; The isocenter is located within the imaging range of the imaging device; or... The isocenter coincides with the imaging center of the imaging device; or... The isocenter is at a preset distance from the imaging center of the imaging device.

12. The radiotherapy system according to claim 10, characterized in that, The imaging device consists of a ray generator and a ray detector mounted on a frame, with the beam emitted by the ray generator being received by the ray detector.

13. The radiotherapy system according to claim 12, characterized in that, The imaging device includes two imaging units, each of which includes a ray generator and a ray detector; wherein the rays from the two imaging units intersect.

14. The radiotherapy system according to claim 1, characterized in that, The beam emitted from the treatment head is a photon beam, particle beam, or electron beam.

15. The radiotherapy system according to claim 1, characterized in that, The treatment involves emitting X-rays or gamma rays.

16. The radiotherapy system according to claim 1, characterized in that, The treatment head can perform stereotactic radiotherapy or intensity-modulated radiotherapy.

17. The radiotherapy system according to claim 1, characterized in that, It also includes a controller for controlling the treatment head output bundles; among which, The treatment head is configured to emit beams simultaneously; or, the treatment head is configured to emit beams at least partially simultaneously.

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