CN210057171U

CN210057171U - Radiotherapy system

Info

Publication number: CN210057171U
Application number: CN201821381744.2U
Authority: CN
Inventors: 刘海峰; 李大梁
Original assignee: Our United Corp
Current assignee: Our United Corp
Priority date: 2018-08-24
Filing date: 2018-08-24
Publication date: 2020-02-14
Anticipated expiration: 2028-08-24

Abstract

The application discloses radiation therapy system belongs to medical technical field. A radiation therapy system is characterized by comprising a radiation source device and an imaging device, wherein the radiation source device comprises a source carrier body and a collimation body; a plurality of radioactive sources are arranged on the source carrier, and included angles of the plurality of radioactive sources in the longitude direction are within a preset included angle range; the collimating body is provided with a plurality of collimating hole groups, and the included angle of each collimating hole group in the longitude direction is within the range of the preset included angle; each collimation hole group comprises a plurality of collimation holes, and beams emitted by a plurality of radioactive sources pass through the collimation holes of the collimation hole group and then intersect at a common focus; the common focus is located outside the end face of the source device, the imaging device is arranged on one side of the source device along the direction of the rotating shaft of the source device, and the common focus is located in the imaging area of the imaging device.

Description

Radiotherapy system

Technical Field

The application relates to the technical field of medical treatment, in particular to a radiation therapy system.

Background

With the development of medical technology, radiotherapy is more and more widely applied to the treatment of tumors.

The existing radiotherapy system for treating the head mainly comprises a head gamma knife, wherein a natural isotope radioactive source cobalt-60 is used for emitting gamma rays, and the radioactivity of the rays is used for killing tumor cells. However, since the radiation can also damage normal tissues or cells, the existing head gamma knife comprises 30 or 180 radioactive sources, the radioactive sources respectively emit beams from different directions and focus on a common focus, the radiation dose rate at the common focus is the maximum, and the beam emitted by each radioactive source has less damage to the normal tissues or cells, so that the aim of killing tumor cells and protecting the normal tissues or cells is fulfilled, and the tumor treatment effect is realized.

However, the treatment space of the head gamma knife is small, only the head can be accommodated, and an imaging device cannot be installed in the treatment space, so that whether a patient moves in the existing treatment monitoring process is monitored by arranging a reflecting device on the body surface of a human body and utilizing infrared rays. However, the accuracy requirement of head treatment is very high, generally about 0.1mm, and the error of body surface monitoring is large, so that the high-accuracy requirement of clinic is difficult to meet.

SUMMERY OF THE UTILITY MODEL

The application provides a radiation therapy system which can monitor the movement condition of a patient by acquiring an image of the patient in the treatment process and can protect sensitive tissues and organs in the treatment process. The technical scheme is as follows:

in one aspect, a radiation therapy system is provided, comprising a source arrangement and an imaging arrangement, the source arrangement comprising a source carrier and a collimator body;

a plurality of radioactive sources are arranged on the source carrier, and included angles of the plurality of radioactive sources in the longitude direction are within a preset included angle range; the collimating body is provided with a plurality of collimating hole groups, and the included angle of each collimating hole group in the longitude direction is within the range of a preset included angle; each collimation hole group comprises a plurality of collimation holes, and beams emitted by the plurality of radioactive sources pass through the collimation holes of the collimation hole group and then intersect at a common focus;

the common focus is positioned outside the end face of the radiation source device, the imaging device is arranged on one side of the radiation source device along the rotating shaft direction of the radiation source device, and the common focus is positioned in the imaging area of the imaging device.

The beneficial effect that technical scheme that this application provided brought is:

the application provides a radiation therapy system, on the one hand, the public focus is located outside the terminal surface of source device, imaging device sets up the one side at source device along the rotation axis direction of source device, and the public focus is located imaging device's formation of image area, can image the patient's tumour that is located imaging area through imaging device promptly, confirms whether the patient takes place the displacement according to the image accuracy to and the concrete direction and the distance of removal, so that through removing the treatment couch to relocate and make the patient's tumour be located public focus department.

In another aspect, the source device includes a source carrier and a collimator; a plurality of radioactive sources are arranged on the source carrier, and included angles of the plurality of radioactive sources in the longitude direction are within a preset included angle range; the collimating body is provided with a plurality of collimating hole groups, and the included angle of each collimating hole group in the longitude direction is within the range of the preset included angle; each collimation hole group comprises a plurality of collimation holes, and beams emitted by a plurality of radioactive sources pass through the collimation holes of the collimation hole group and then intersect at a common focus. Because the plurality of radioactive sources are distributed in the preset included angle range in the longitudinal direction, the radioactive sources can be driven to rotate along the central shaft of the radiotherapy equipment through the source carrier, so that the radioactive sources can be turned off when passing through sensitive tissues or organs; the radioactive source is used for opening the source when passing through normal tissues and organs, so that sensitive tissues and organs such as eyes can be protected in the treatment process of head tumor, and additional injury is avoided.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a conventional radiotherapy apparatus provided in an embodiment of the present application;

figure 2 is a schematic structural view of a prior art radiation source arrangement provided by an embodiment of the present application;

fig. 3 is a schematic top view of a conventional active carrier according to an embodiment of the present disclosure;

FIG. 4 is a schematic top view of a prior art collimating body according to an embodiment of the present disclosure;

FIG. 5 is a schematic view of a carrier according to an embodiment of the present disclosure;

FIG. 6 is a schematic view of a collimating body provided by an embodiment of the present application;

FIG. 7 is a schematic view of a collimating body provided by an embodiment of the present application;

FIG. 8 is a schematic view of another radiation therapy system provided in accordance with an embodiment of the present application;

FIG. 9 is a schematic view of another carrier according to an embodiment of the present application;

FIG. 10 is a schematic view of another collimating body provided by embodiments of the present application;

FIG. 11 is a schematic view of another radiation therapy system provided in accordance with an embodiment of the present application;

FIG. 12 is a schematic view of another radiation therapy system provided in accordance with an embodiment of the present application;

fig. 13 is a schematic diagram of another switch provided in the embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

The radiation therapy device for head tumor in the prior art is based on the principle of the radiation therapy of head tumor as shown in fig. 1 and fig. 2, a plurality of radiation sources 111 are installed on a carrier 22, the radiation beams emitted by the plurality of radiation sources 111 pass through the collimating holes on the collimating body 23 and then intersect at a common focus Q1, and the common focus Q1 is located in the cavity of the radiation source device 11 of the radiation therapy device. The couch 12 is used to carry a patient and move it inside the treatment chamber of the source arrangement 11 so that the patient's lesion is located at the intersection point for radiation treatment.

In the conventional radiotherapy apparatus, the source carrier 22 is bowl-shaped as shown in fig. 3, the radioactive sources 111 are divided into six groups, each group includes 30 radioactive sources 111 in total, and the five sources are distributed on the source carrier 22. The collimating body 23 is as shown in fig. 4, the collimating body 23 is provided with six groups of collimating channel groups, the six groups of collimating channel groups correspond to the six groups of radiation sources 111, each collimating channel group comprises four groups, a solid tungsten rod is filled in the collimating hole of one group to realize source-closing shielding, the other groups comprise 5 collimating holes, and the collimating holes of different groups are different in size.

On the one hand, in the treatment process, the treatment space of the radiation source device 11 is small, only the head can be accommodated, and the imaging device 13 cannot be installed in the treatment space, so that whether the patient moves in the existing monitoring treatment process is monitored by arranging a reflecting device on the body surface of the human body and utilizing infrared rays. However, the accuracy requirement of head treatment is very high, generally about 0.1mm, and the error of body surface monitoring is large, so that the high-accuracy requirement of clinic is difficult to meet.

On the other hand, the source carrier 22 and the collimating body 23 can be driven to rotate mutually during treatment to switch collimating holes with different sizes and the radioactive source 111 is shielded by the collimating body 23 to realize switching source, but the size switching of the six groups of collimating holes and the switching source are switched simultaneously, and one group cannot be controlled independently. Thus, during treatment, the eye (sensitive tissue organs) is avoided only by adjusting the gamma angle so that the radiation avoids the eye.

The application provides a radiotherapy system, which comprises a radiation source device 11 and an imaging device 13, wherein the radiation source device 11 comprises a carrier source body 22 and a collimating body 23; the source carrier 22 is provided with a plurality of radioactive sources 111, and included angles of the plurality of radioactive sources 111 in the longitude direction are within a preset included angle range; a plurality of collimation hole groups are arranged on the collimation body 23, and the included angle of each collimation hole group in the longitude direction is within the preset included angle range; each of the plurality of collimation holes includes a plurality of collimation holes, and the beams emitted by the plurality of radiation sources 111 pass through the collimation holes of the plurality of collimation holes and intersect at a common focus Q1.

The common focus Q1 is located outside the end face of the source device 11, the imaging device 13 is disposed on the side of the source device 11 in the direction of the rotation axis of the source device 11, and the common focus Q1 is located within the imaging region of the imaging device 13.

In the radiation therapy system provided by the present application, on one hand, as shown in fig. 8, 11 and 12, the common focus Q1 is located outside the end face of the source device 11, the imaging device 13 is disposed at one side of the source device 11 along the rotation axis direction of the source device 11, and the common focus Q1 is located within the imaging region of the imaging device 13, i.e., the tumor of the patient located within the imaging region can be imaged by the imaging device 13, whether the patient is displaced or not is accurately confirmed according to the image, and the specific direction and distance of the movement are determined, so that the tumor of the patient is repositioned to be at the common focus Q1 by moving the treatment couch 12.

Furthermore, the source arrangement 11 comprises a source carrier 22 and a collimator 23; the source carrier 22 is provided with a plurality of radioactive sources 111, and included angles of the plurality of radioactive sources 111 in the longitude direction are within a preset included angle range; a plurality of collimation hole groups are arranged on the collimation body 23, and the included angle of each collimation hole group in the longitude direction is within the preset included angle range; each of the plurality of collimation holes includes a plurality of collimation holes, and the beams emitted by the plurality of radiation sources 111 pass through the collimation holes of the plurality of collimation holes and intersect at a common focus Q1. Because the plurality of radioactive sources 111 are distributed in the preset included angle range in the longitudinal direction, the carrier 22 can drive the plurality of radioactive sources 111 to rotate along the central shaft of the radiotherapy equipment, so that the radioactive sources 111 can be turned off when passing through sensitive tissues or organs; when the radiation source 111 passes through normal tissues and organs, the radiation source is turned on, so that sensitive tissues and organs such as eyes can be protected in the treatment process of head tumor, and additional damage is avoided.

The source device 11 and the imaging device 13 are described in detail below.

In the present application, the source device 11 may be, for example, bowl-shaped or cylindrical, as shown in fig. 8, and its carrier 22 may be as shown in fig. 5, and its collimating body 23 may be as shown in fig. 6, and the carrier 22 and the collimating body 23 are bowl-shaped, and their longitudinal directions are as shown by arrows, and they are directions of 0 ° -360 ° longitude. Alternatively, the source device 11 may be cylindrical, as shown in fig. 11, the source carrier 22 may be as shown in fig. 9, the collimating body 23 may be as shown in fig. 10, and the source carrier 22 and the collimating body 23 are cylindrical, and have longitudinal directions as shown by arrows in the figure, which are directions of 0 ° to 360 ° longitudinally. The size of the two ends of the circular platform in fig. 11 is the same, but the size can be different, and an example is shown in fig. 12. The present application is not limited to the specific shape of the source device 11, and only the above is taken as an example.

The range of the included angle of the present application is illustrated by taking the radiotherapy apparatus shown in fig. 8 as an example. As shown in FIG. 5, the included angle of the radiation source 111 in the longitudinal direction is an included angle formed by taking the center of the radiation source 111 as a reference. It should be noted that, if the radiation source 111 includes a row, and the centers of the multiple radiation sources 111 located in the same row are on the same longitude line, the included angle of the multiple radiation sources 111 in the longitude direction is considered to be zero degree, and in this application, the preset included angle range is greater than or equal to zero degree. As shown in fig. 6, the included angle of the collimating body 23 in the longitudinal direction is an included angle formed with reference to the center of the collimating body 23. It should be noted that, if the collimating bodies 23 include one row, and the centers of the collimating bodies 23 in the same row are on the same longitude line, the included angle of the collimating bodies 23 in the longitude direction is considered to be zero, and in this application, the preset included angle range is greater than or equal to zero.

As shown in fig. 5, for the source carrier 22 provided in the present application, a plurality of radioactive sources 111 are disposed on the source carrier 22, and an included angle of the plurality of radioactive sources 111 in the longitudinal direction is a. Illustratively, the predetermined included angle range A can be 15 ° -60 °, i.e., 15 ° ≦ A ≦ 60 °, the predetermined included angle range A can be any included angle in the range of 15 ° -60 °, illustratively, the predetermined included angle range A can be 5 ° -60 °, i.e., 5 ° ≦ A ≦ 60 °, the predetermined included angle range A can be any included angle in the range of 5 ° -60 °, illustratively, the predetermined included angle range A can be 5 °, 8 °, 10 °, 12 °, 18 °, 20 °, 25 °, 30 °, 40 °, 45 °, 50 °, or 60 °. The number and arrangement of the radiation sources 111 are not limited in this application, and the number of the radiation sources 111 may generally be 20-180, for example, 30 or 180. Only 20 radiation sources 111 are illustrated in fig. 5 as an example.

As an example, as shown in fig. 5, for a bowl-shaped collimating body 23 provided by the present application, fig. 5 illustrates that 4 collimating hole sets are provided on the collimating body 23, which are ① collimating hole sets, ② collimating hole sets, ③ collimating hole sets, and ④ collimating hole sets, each of which includes 24 collimating holes and corresponds to the distribution of the radioactive sources 111, as an example of the ② 0 collimating hole set, the beams emitted by the radioactive sources 111 pass through the collimating holes of the ② 1 collimating hole set and intersect at a common focus Q1., wherein an included angle in the longitudinal direction of the ① collimating hole set, the ② collimating hole set, the ③ collimating hole set, and the ④ collimating hole set is within a preset included angle range, as an example of the ① collimating hole set, the ① collimating hole set is a in the longitudinal direction (the direction of the arrow shown in fig. 5), and the preset included angle in the longitudinal direction of the radioactive source carrier body a is equal to a preset angle of 22, and the preset included angle of the radioactive source a is equal to 60 degrees.

The collimating body 23 is provided with a plurality of collimating hole sets, two or more collimating hole sets may be provided on the collimating body 23, and fig. 6 illustrates an example in which only 4 collimating hole sets are provided on the collimating body 23. Each of the collimating aperture sets includes a plurality of collimating apertures corresponding to the number and arrangement of the radiation sources 111 and the plurality of radiation sources 111 on the carrier body 22, so that the beams emitted by the radiation sources 111 pass through the collimating apertures and intersect at a common focus Q1.

As shown in fig. 11, the source device 11 may be cylindrical, and as shown in fig. 9, the carrier 22 may be cylindrical as shown in fig. 9, with the longitudinal direction thereof being indicated by arrows in fig. 9. In fig. 9, the size of the two ends of the cylindrical carrier 22 is the same. The specific number and arrangement of the radiation sources 111 are not limited in the present application, and fig. 9 only illustrates an example including 20 radiation sources 111. The collimating body 23 may also be a cylinder as shown in fig. 10, and the number and arrangement of the plurality of collimating holes correspond to the number and arrangement of the radiation sources 111, which are not described herein. In the present application, the number of the collimating hole groups on the collimating body 23 is not limited, and fig. 10 illustrates an example in which two collimating hole groups are disposed on the collimating body 23, and each collimating hole group includes 20 collimating holes.

Of course, the source device 11 may be a cylindrical device as shown in fig. 12, and the size of both ends of the cylindrical carrier 22 is different in fig. 12.

On one hand, in the radiotherapy system provided by the application, a plurality of radioactive sources 111 are arranged on radiotherapy equipment, a plurality of collimation hole groups are arranged on the collimation body 23, and the included angle of the radioactive sources 111 in the longitude direction is within the preset included angle range; the plurality of radioactive sources 111 on the source carrier 22 are distributed within a preset included angle range in the longitudinal direction, so that the radiotherapy equipment can drive the plurality of radioactive sources 111 to rotate along the central axis of the radiotherapy equipment through the source carrier 22, and the radioactive sources 111 are turned off when passing through sensitive tissues or organs; when the radiation source 111 passes through normal tissues and organs, the radiation source is turned on, so that sensitive tissues and organs such as eyes can be protected in the treatment process of head tumor, and additional damage is avoided.

The carrier 22 provided in the present application will be specifically illustrated in fig. 5.

For example, in the source carrier 22 provided by the present application, in the longitudinal direction, the plurality of radiation sources 111 are divided into a plurality of groups, and the included angle between two adjacent groups of radiation sources 111 ranges from 2 ° to 15 °. For example, in the multiple groups of radiation sources 111, the included angles of any two adjacent groups of radiation sources 111 are the same, or the included angles of two adjacent groups of radiation sources 111 are different, which is not limited in this application, and fig. 5 is only an example. As shown in FIG. 5, the plurality of radiation sources 111 are divided into 5 groups, the included angle of two adjacent groups of radiation sources 111 is B (the two groups are shown schematically in FIG. 5 as an example), the included angle B can be 2-15 degrees, i.e. 2-15 degrees, and the preset included angle B can be any included angle within the range of 2-15 degrees, for example, the preset included angle B can be 2 degrees, 2.5 degrees, 3 degrees, 5 degrees, 6 degrees, 8 degrees, 10 degrees, 12 degrees or 15 degrees.

In the source carrier 22 provided by the present application, the included angle of the plurality of radioactive sources 111 in the latitudinal direction ranges from 20 degrees to 60 degrees. Illustratively, as shown in fig. 5, the source carrier 22 has a plurality of radiation sources 111 disposed therein within a predetermined range C in the longitudinal direction. Illustratively, the preset angle range C can be 20-60 degrees, i.e., 20 ≦ C ≦ 60 degrees, and the preset angle range C can be any angle within the range of 20-60 degrees, e.g., the preset angle range C can be 20, 25, 30, 38, 40, 45, 50, 53, or 60 degrees.

For example, the source carrier 22 provided by the present application includes an included angle between any two adjacent radioactive sources 111 in the latitudinal direction ranging from 1 ° to 10 °. For example, in the plurality of radiation sources 111, the included angles of any two adjacent radiation sources 111 in the latitudinal direction are the same, or the included angles of any two adjacent radiation sources 111 in the latitudinal direction are different, which is not limited in this application, and fig. 5 is only an example. Illustratively, as shown in fig. 5, in the case of two radiation sources 111, the included angle between the two radiation sources 111 in the latitudinal direction is D, the included angle D may be 1 ° to 10 °, i.e., 1 ° to D ≦ 10 °, the preset included angle D may be any included angle within a range of 1 ° to 10 °, and the preset included angle B may be, for example, 1 °, 2 °, 3, 5 °, 6 °, 8 °, 9 ° or 10 °.

In the source carrier 22 shown in fig. 5, the radioactive sources 111 include a plurality of longitudinal rows, the radioactive sources 111 in the same row have the same longitude, and are divided into a plurality of latitudes, and the radioactive sources 111 in the same row have the same latitude. Further, for example, to achieve non-coplanar irradiation and better protect normal tissues, the position of the source carrier 22 and the position of the radiation source 111 in the latitudinal direction are different. I.e., each radiation source 111 has a different latitude.

According to the source carrier 22 provided by the application, the source carrier 22 is provided with a plurality of radioactive source 111 holes, and the radioactive source 111 is fixedly installed in the radioactive source 111 holes. Alternatively, the source carrier 22 is provided with a source box position matching with the source box shape, the source box can be fixedly installed at the source box position, and the source box is provided with a plurality of radioactive sources 111. The source boxes may be through holes or blind holes, and a plurality of collimating holes are disposed on the source carrier 22, so that the radiation beams from the radiation source 111 can be emitted through the collimating holes. The shape and structure of the source box and the source box position are not limited in the application.

The source carrier 22 is further provided with a source cassette connecting part for fixing the source cassette at the source cassette position. Similarly, the source box is also provided with a connecting part used for being connected with the source box position. For example, the source carrier 22 and the source cassette may be connected by a screw or a snap connection, and the connection and fixing manner of the source cassette and the source cassette position is not limited in the present application, and the above description is only given as an example.

In the source carrier 22 provided by the present application, the source box is further provided with a connecting portion for replacing the source box. The source cartridge connecting part may be a screw hole, which may be connected by screw with the source guiding rod, for example. Alternatively, the source box connecting part and the source guide rod can be in magnet adsorption connection. The connection between the source cassette and the source guide rod and the replacement of the source cassette are not limited in this application, and the above description is only given as an example.

The source carrier 22 provided by the present application has a source box made of different material from the source carrier 22. For example, the source cartridge may be formed of a tungsten alloy and the source carrier 22 may be formed of cast iron.

The carrier 22 provided in the present application will be specifically illustrated in fig. 6.

The present application provides a collimating body 23, in the longitudinal direction, the distance between two adjacent collimating holes is larger than the size of the radiation source 111. It is thus also possible to shield the radioactive source 111 by offsetting the collimating body 23 and the radioactive source 111 only by a small angle, so that the spacing between the collimating apertures shields the radioactive source 111 avoiding the use of the shielding position P1, since only a small angle of offset is required, so that a fast switching of the source can be achieved.

By way of example, the collimating body 23 provided by the present application includes a plurality of rows of collimating holes in the longitudinal direction, and the included angle between two adjacent rows of radiation sources 111 is in the range of 2 ° to 15 °. In an example, in the collimating hole group, the included angle of any two adjacent rows is the same, or the included angle of two adjacent rows is different, which is not limited in this application, and fig. 6 is only an example. As shown in FIG. 6, the plurality of radiation sources 111 are divided into 4 rows, the included angle of the collimation holes of the adjacent rows is B (the two rows are shown as an example in FIG. 4), the included angle B can be 2-15 degrees, i.e. 2-15 degrees, the preset included angle B can be any included angle within the range of 2-15 degrees, and the preset included angle B can be 2 degrees, 2.5 degrees, 3 degrees, 5 degrees, 6 degrees, 8 degrees, 10 degrees, 12 degrees or 15 degrees.

The collimating body 23 provided by the present application has collimating hole groups with an included angle in the latitudinal direction in the range of 20-60 °. Illustratively, as shown in FIG. 6, the preset angle range C may be 20-60, i.e., 20 ≦ C ≦ 60, and the preset angle range C may be any angle within the range of 20-60, and illustratively, the preset angle range C may be 20, 25, 30, 38, 40, 45, 50, 53, or 60.

Illustratively, the collimating body 23 provided by the present application includes an included angle between any two adjacent collimating holes in the latitudinal direction ranging from 1 ° to 10 °. For example, the included angle of any two adjacent collimating holes in the latitudinal direction is the same, or the included angle of any two adjacent collimating holes in the latitudinal direction is different, which is not limited in this application, and fig. 6 is only an example. Illustratively, as shown in FIG. 6, two of the collimating holes are taken as an example, the included angle D between the two collimating holes in the latitudinal direction is 1-10 °, i.e., 1 ° ≦ D ≦ 10 °, and the preset included angle D may be any included angle within the range of 1-10 °, and the preset included angle D may be 1 °, 2 °, 3, 5 °, 6 °, 8 °, 9 °, or 10 °, for example.

In the collimating body 23 shown in fig. 6, the collimating holes of the collimating hole group include a plurality of rows in the longitudinal direction, the radioactive sources 111 in the same row have the same longitude, and are also divided into a plurality of rows in the latitudinal direction, and the radioactive sources 111 in the same row have the same latitude. Further, for example, to achieve non-coplanar illumination and better protect normal tissue, the present application provides a source carrier 22 with collimating holes at different latitudinal positions. I.e. each collimating hole has a different latitude.

The present application provides a collimating body 23, the collimating body 23 further comprising a shielding position P1 for shielding the beams of the plurality of radiation sources 111. That is, the collimation body 23 can shield the rays of the radioactive source 111 to realize the source-off. The specific position of the shielding bit P1 in the shielding body 21 is not limited in the present application, and fig. 6 illustrates an example in which the shielding bit P1 is opposite to each position of the collimation hole group.

In the collimating body 23 provided by the present application, the shielding bit P1 is located between any two adjacent collimating hole groups in the plurality of collimating hole groups, for example, as shown in fig. 7, the shielding bit P1 is located between the collimating hole group No. ② and the collimating hole group No. ③.

In fig. 7, only one mask bit P1 is taken as an example, in the collimator 23 provided in the present application, the collimator 23 includes a plurality of mask bits P1. for example, a mask bit P1 may be further provided between collimation hole group No. ① and collimation hole group No. ②. a mask bit P1 may also be provided between collimation hole group No. ③ and collimation hole group No. ④. a mask bit P1 may also be provided between each two adjacent collimation hole groups.

The utility model provides a collimation body 23, collimation body 23 include fixed connection's interior collimation body 23 and outer collimation body 23, and the collimation hole on the collimation body 23 of interior collimation body and the collimation hole on the outer collimation body 23 correspond the setting. I.e. the collimating body 23 may comprise a double layer, the inner collimating body 23 and the outer collimating body 23 may be fixed by a screw connection.

The collimating body 23 provided by the present application, the collimating body 23 comprises an inner collimating body 23 and an outer collimating body 23, and the inner collimating body 23 and the outer collimating body 23 can rotate relatively. For example, during the treatment process, if an accident occurs, the inner collimating body 23 can be used to achieve a fast source-off, the outer collimating body 23 is rotated to make the shielding position P1 align with the radiation source 111 to shield the radiation source 111, and the shielding position P1 of the inner collimating body 23 is aligned with the radiation source 111 to achieve a complete source-off.

The collimation body 23 that this application provided, the collimation hole on the interior collimation body 23 is the straight hole, and/or, the collimation hole on the outer collimation body 23 is the taper hole. For example, the inner collimating body 23 may be a straight hole, and the outer collimating body 23 may also be a straight hole; or, the inner collimating body 23 is a straight hole, and the outer collimating body 23 is a tapered hole; it is also possible that both the inner collimating body 23 and the outer collimating body 23 are conical holes.

The collimating body 23 provided by the present application is provided with the shielding body 21 at the shielding position P1, and the material density of the shielding body 21 is greater than that of the collimating body 23. Illustratively, the shield 21 is fixedly connected to the collimator 23, and the shield 21 may be made of tungsten block or lead block or alloy thereof. The collimating body 23 may be composed of cast iron. The shield 21 thus enables a better shielding of the radiation source 111.

Regarding the description of the source carrier 22 and the collimator 23, only the above is taken as an example, and the arrangement manner of the source carrier 22 and the collimator 23 may also be used in the rotating shaft of the cylindrical source, which is not described herein again.

In the radiation therapy system provided by the present application, the radiation source device 11 further comprises a switch body 24, the switch body 24 is located between the source carrier 22 and the collimating body 23; at least two groups of hole sites corresponding to the radioactive source 111 are arranged on the switch body 24, wherein one group of hole sites are through holes, and the other groups of hole sites comprise through holes and shielding sites P1. For example, as shown in fig. 13, 5 groups of hole sites, i.e., a-e groups of hole sites, are disposed on the switch body 24, wherein all hole sites a are through holes, only one row of hole sites b is a shielding position P1 for the rest of hole sites, two rows of hole sites c are a shielding position P1 for the rest of hole sites, three rows of hole sites d are a shielding position P1 for the rest of hole sites, and four rows of hole sites e are a shielding position P1 for the rest of hole sites. The shielding position P1 may be formed by providing no hole in the switch body 24, or by providing a hole in the switch body 24 but filling a tungsten rod in the hole to shield the radiation source 111.

The application provides a radiotherapy system, is provided with different hole sites on the switch body 24, and the trompil number of different hole sites is different, then can be through making the corresponding radioactive source 111 of different hole sites of switch body 24 to selective shielding part radioactive source 111, with the dose of regulation focus department.

In a radiation therapy system provided by the present application, the source carrier 22 and the collimator 23 can rotate around the central axis of the source device 11 by 360 ° or rotate back and forth. The central axes of the source carrier 22 and the collimator 23 diffraction source device 11 may be rotated back and forth, and the source carrier 22 and the collimator 23 may be rotated back and forth within 270 °. The angle of the reciprocal rotation is not limited in the present application, and the above description is only given as an example.

In a radiation therapy system, the source carrier 22 and/or the collimator 23 are movable along a predetermined trajectory. By way of example, as shown in fig. 11, the source carrier 22 and/or the collimator 23 can be moved in the direction of the central axis of the source arrangement 11. Alternatively, as shown in fig. 12, the source carrier 22 and/or the collimating body 23 may be movable in the direction a. Specifically, the source carrier 22 may be moved along the central axis of the source device 11, and the collimator 23 may be fixed; alternatively, the collimator 23 is moved along the direction of the central axis of the source device 11, and the carrier 22 is fixed; alternatively, both the source carrier 22 and the collimator 23 can be movable in the direction of the central axis of the source arrangement 11. The source carrier 22 and/or the collimating body 23 move along a predetermined trajectory, which may be a switching source.

The present application provides a radiation therapy system in which the source carrier 22 and/or the collimator 23 are composed of a plurality of segments. By way of example, the radiation source 111 may be located on one of the segments of the carrier source body 22, or the segment may be movable in the direction of the central axis of the source arrangement 11. The collimating body 23 may also be composed of a plurality of segments, and the collimating body 23 may include a plurality of collimating hole sets, each collimating hole set being correspondingly disposed on one segment, or a plurality of collimating hole sets being disposed on one segment. Still alternatively, the collimating body 23 may be provided with associated source bits, and one set of collimating holes and one associated source bit may be provided on one segment.

In the radiation therapy system provided by the present application, the carrier 22 may also be a sheet, i.e., one of the plurality of segments. The specific shape of the carrier body 22 is not limited in this application.

During treatment, the patient's tumor needs to be precisely located at the common focus Q1 so that the radiation kills the tumor cells. However, if the patient moves during the treatment, the radiation will shift, which is not only detrimental to the treatment but also harmful to the health of the patient, and since the common focus Q1 of the conventional radiotherapy apparatus is located in the cavity of the radiation source device 11, it is impossible to monitor whether the head of the patient moves during the treatment. The radiation therapy system provided by the present application has the common focus Q1 located outside the end face of the source device 11 and the common focus Q1 located within the imaging area of the imaging device 13, so that the patient can be imaged by the imaging device 13 to accurately confirm the movement of the patient, so as to drive the treatment couch 12 to bring the tumor of the patient back into alignment with the common focus Q1.

In the radiotherapy system of the present application, the imaging device 13 is any one of an X-ray imaging device 13, a CT imaging device 13, an ultrasound imaging device 13, a DSA imaging device 13, an MR imaging device 13, and a PET imaging device 13, or any combination thereof. For example, the imaging device 13 is an X-ray imaging device 13, which may include an X-ray tube 132 and a flat panel detector, as shown in fig. 8, 11 and 12, for example. Or may include two X-ray tubes 132 and two flat panel detectors, the beams from the two X-ray tubes 132 intersecting. Of course, the imaging device 13 may also be a combination of any two or more different imaging devices 13, for example the imaging device 13 may be a combination of an X-ray imaging device 13 and a DSA imaging device 13. The present application is not limited to the specific arrangement of the imaging device 13, and only the above example is used for illustration.

Illustratively, in the case where the imaging device 13 includes an imaging center point, the common focus Q1 coincides with the imaging center point. For example, the imaging device 13 includes two X-ray tubes 132 and two X-ray flat panels 131 correspondingly receiving the beams emitted from each X-ray tube 132, and the beams emitted from the two X-ray tubes 132 intersect at a common focal point Q1.

The present application provides a radiation therapy system in which the imaging device 13 is rotatable along the central axis of the source device 11. As shown in fig. 8, 11 and 12, if the imaging device 13 includes one X-ray tube 132 and one X-ray flat panel 131, it cannot be determined from the image if the patient moves in the up-down direction shown in fig. 8, 11 and 12. Therefore, if the imaging device 13 is rotated along the central axis of the source device 11, it can acquire images of the patient at different angles, so that it can be confirmed whether the patient has moved or not at each angle.

The imaging device 13 may be rotated by mounting the imaging device 13 with a rotating device, for example, by a gear ring, or by a slip ring drive. The present application does not limit the driving manner of the imaging device 13.

In the radiation therapy system provided by the present application, the imaging device 13 is fixedly connected to the radiation source device 11. Illustratively, the imaging device 13 is fixedly connected to either the source carrier 22 or the collimator 23. Taking the example shown in fig. 8 as an example, the radiation bulb 132 and the X-ray flat panel 131 may be fixedly connected to the source carrier 22, so that the source carrier 22 rotates to drive the imaging device 13 to rotate, thereby avoiding a separate rotation driving device for imaging. Of course, the chenxisang device may be fixedly connected to the switch body 24 or the collimating body 23, which is not limited in this application.

In a radiation therapy system provided by the present application, the radiation therapy equipment further comprises a shielding device 14, the shielding device 14 is located at one side of the radiation source device 11, and the radiation beam emitted by the radiation source 111 passes through the common focus Q1 and is shielded by the shielding device 14. Illustratively, as shown in fig. 8, 11 and 12, the shielding device 14 is located at one side of the common focus Q1 of the radiation source device 11, and the radiation beam emitted by the radiation source 111 passes through the common focus Q1 and is shielded by the shielding device 14 to avoid unnecessary radiation in the treatment room. For example, the shielding device 14 is a ring-shaped body, and the radiation of one rotation of the radiation source 111 around the central axis is received by the shielding device 14. Alternatively, the shielding device 14 is a shielding block that is rotatable along the central axis of the source device 11 to receive radiation after passing through the common focus point Q1 following the rotation of the radiation source 111. It should be noted that, when the treatment couch 12 carries the patient for movement, the shielding device 14 is provided with a passage for facilitating the movement of the treatment couch 12.

For example, the present application does not limit the position arrangement of the shielding device 14 and the imaging device 13, for example, the imaging device 13 may be separately fixed, or may be arranged inside the shielding device 14.

The radiation therapy system that this application provided still includes shielding door 15, and shielding door 15 can open or closed radiation therapy system's cavity. As shown in fig. 8, the shielding door 15 may be disposed outside the cavity of the radiation source device 11, and may open or close the cavity of the radiation source device 11, and may be opened and closed up and down, or opened and closed left and right. So that during non-treatment times the beam can be shielded by the shield door 15. Of course, the shield door 15 may be provided between the imaging device 13 and the shield device 14, or the shield door 15 may be provided outside the shield door 15. The specific installation position of the shield door 15 is not limited in the present application, and the description will be given by taking the example shown in fig. 8 as an example.

The radiation therapy system provided by the present application, as shown in fig. 8, is further provided with an anti-subsidence assembly between the collimator body 23 and the source carrier body 22. Further, the source device 11 further comprises a shielding body 21 located outside the source carrier 22, and a sinking prevention assembly is further disposed between the shielding body 21 and the source carrier 22. For example, the anti-sinking component may be a bearing, so as to avoid the collimation body 23 and the carrier source body 22 from drooping under the condition that one end is driven to rotate and the other end is driven to rotate.

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A radiation therapy system is characterized by comprising a radiation source device and an imaging device, wherein the radiation source device comprises a carrier source body and a collimation body;

2. The radiation therapy system of claim 1, wherein said imaging device is any one of an X-ray imaging device, a CT imaging device, an ultrasound imaging device, a DSA imaging device, an MR imaging device, a PET imaging device, or any combination thereof.

3. The radiation therapy system of claim 2, wherein, where the imaging device includes an imaging center point, the common focal point coincides with the imaging center point.

4. The radiation therapy system of claim 1, wherein said imaging device comprises two X-ray tubes and two X-ray panels corresponding to receive beams from each X-ray tube, the beams from the two X-ray tubes intersecting at a common focal point.

5. The radiation therapy system of claim 1, wherein said imaging device comprises an X-ray tube and an X-ray plate corresponding to receive the beam from the X-ray tube.

6. The radiation therapy system of claim 1, wherein said imaging device is rotatable along said source device central axis.

7. The radiation therapy system of claim 6, wherein said imaging device is fixedly attached to said source device.

8. The radiation therapy system of claim 7, wherein said imaging device is fixedly coupled to either of said source carrier or said collimator.

9. A radiation therapy system according to claim 1, further comprising shielding means located to one side of said source means, the radiation emitted by said radiation source passing through the common focus and being shielded by said shielding means.

10. A radiation therapy system according to claim 9, wherein said shielding means is an annular body or alternatively said shielding means is a shielding block rotatable along said source means central axis.

11. The radiation therapy system of claim 1, further comprising a shielded door that can open or close a cavity of the radiation therapy system.

12. The radiation therapy system of claim 1, further comprising an anti-subsidence assembly disposed between said collimation body and said source carrier.

13. The radiation therapy system of claim 1, wherein said source assembly further comprises a shield, and an anti-subsidence assembly is further disposed between said shield and said carrier.

14. The radiation therapy system of claim 1, wherein said predetermined included angle is in the range of 5 ° -60 °.

15. The radiation therapy system of claim 1, wherein the spacing between two adjacent collimating apertures in the longitudinal direction is greater than the size of the radiation source.

16. The radiation therapy system of claim 1, wherein said source arrangement further comprises a switch body positioned between said source carrier and a collimating body;

at least two groups of hole sites corresponding to the radioactive sources are arranged on the switch body, wherein one group of hole sites are through holes, and the rest groups of hole sites comprise through holes and shielding sites.

17. The radiation therapy system of claim 1, wherein said source carrier and said collimating body are rotatable circumferentially around a central axis of the source device by 360 ° or reciprocally.

18. Radiotherapy system according to claim 1, characterized in that the source carrier and/or the collimation body are movable along a preset trajectory.

19. A radiation therapy system according to claim 18, characterized in that said carrier body and/or said collimating body are movable in the direction of the central axis of the source arrangement.

20. The radiation therapy system of claim 1, wherein said radiation source assembly further comprises a source cartridge having a plurality of radiation sources fixedly disposed thereon;

and a source box position is arranged in a preset included angle range of the source carrier in the longitude direction, and the source box position is matched with the source box in shape.

21. The radiation therapy system of claim 1, wherein the source carrier and/or collimator comprises a plurality of segments.

22. The radiation therapy system of claim 21, wherein where the source carrier includes a plurality of segments, the plurality of radiation sources are distributed over one of the segments of the source carrier.