CN210131261U - Carrier and radiotherapy equipment - Google Patents

Abstract

The application discloses carrier and radiotherapy equipment belongs to medical technical field. The source carrier is provided with a plurality of radioactive sources, and included angles of the radioactive sources in the longitude direction are within a preset included angle range. Can protect sensitive tissues and organs during treatment.

Description

Carrier and radiotherapy equipment

Technical Field

The application relates to the technical field of medical treatment, in particular to a source carrier and radiotherapy equipment.

Background

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

The existing radiotherapy equipment 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, during the treatment of head tumor, sensitive tissue organs (such as eyes and other important nerves) need to be avoided, and the existing radiotherapy equipment avoids the irradiation of the sensitive tissue organs by adjusting the gamma angle of the patient, i.e. by adjusting the pitch angle of the head.

The application provides a novel sensitive tissue organ protection implementation mode.

SUMMERY OF THE UTILITY MODEL

The application provides a carrier and radiotherapy equipment, which can protect sensitive tissues and organs in the treatment process. The technical scheme is as follows:

on the one hand, this application provides a carrier, be provided with a plurality of radiation sources on the carrier, just the contained angle of a plurality of radiation sources in the longitude direction is in predetermineeing the contained angle within range.

On the other hand, this application provides a radiotherapy equipment, radiotherapy equipment includes the source device of giving up, the source device of giving up includes that this application provides carrier source body and collimation body, the beam process that a plurality of radiation sources on the carrier source body sent intersects in a public focus after the collimation body carries out the collimation.

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

the application provides a radiotherapy device, wherein included angles of a plurality of radioactive sources on a source carrier in the longitude direction are within a preset included angle range, so that the radioactive sources can be driven to rotate along the central shaft of the radiotherapy device through the source carrier, and 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 view of a carrier according to an embodiment of the present disclosure;

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

FIG. 6 is a schematic view of another carrier according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of a source cartridge provided in an embodiment of the present application;

FIG. 8 is a schematic structural diagram of an embodiment of the present application in which a common focus is located outside an end face of a carrier;

figure 9 is a schematic view of a radiotherapy apparatus provided by an embodiment of the present application;

figure 10 is a schematic view of another radiotherapy apparatus provided in an embodiment of the present application;

figure 11 is a schematic view of another radiotherapy apparatus provided in an embodiment of the present application;

figure 12 is a schematic view of another radiotherapy apparatus provided in an embodiment of the present application;

fig. 13 is a schematic diagram of a control driving method provided in an embodiment of the present application;

FIG. 14 is a schematic view of a therapeutic irradiation provided by an embodiment of the present application;

FIG. 15 is a schematic diagram of another control driving method provided in the embodiments of the present application;

FIG. 16 is a schematic view of another therapeutic irradiation provided by embodiments of the present application;

FIG. 17 is a schematic diagram of another control driving method provided in the embodiments of the present application;

fig. 18 is a schematic diagram of another control driving method provided in the embodiment of the present application.

Description of reference numerals:

01 denotes a source device, 02 denotes a treatment couch, 03 denotes a shield, 04 denotes a carrier, 05 denotes a collimator, 06 denotes a source position, 07 denotes a source box, 08 denotes a radiation source, 09 denotes a common focus, 10 denotes an imaging device, 11 denotes a shield device, 12 denotes a detector, 111 denotes an X-ray plate, 112 denotes a bulb, and 113 denotes a flat panel detector.

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 principle of the head tumor of the existing radiation therapy equipment which can be used for the head tumor is shown in figures 1 and 2, a plurality of radioactive sources are installed on a carrier, beams emitted by the radioactive sources pass through collimating holes on a collimating body and then intersect at a common focus, and the common focus is positioned in a cavity of a radiation source device of the radiation therapy equipment. The treatment couch is used for carrying the patient and moving the patient to the inside of the treatment cabin of the radiation source device, so that the focus of the patient is positioned at the intersection point for radiotherapy.

The carrier of the existing radiotherapy equipment is bowl-shaped as shown in fig. 3, the radioactive sources are divided into six groups, each group includes 30 radioactive sources in total, and the five radioactive sources are distributed on the carrier. The collimating body is provided with a plurality of collimating channels, and rays emitted by the radioactive source penetrate through the collimating channels to intersect at a common focus. The collimating body comprises six groups of collimating channel groups, the six groups of collimating channel groups correspond to the six groups of radiation sources in position, each collimating channel group comprises four small groups, a solid tungsten rod is filled in a collimating hole of one small group to realize source-closing shielding, the other small groups comprise 5 collimating holes, and the collimating holes of different small groups are different in size.

During treatment, the source carrier and the collimating bodies can be driven to rotate mutually to switch collimating holes with different sizes and to shield the radioactive source through the collimating bodies to realize switching sources, but the size switching of the six groups of collimating holes and the simultaneous switching of the switching sources cannot control one group 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 utility model provides a radiotherapy equipment, the example, refer to figure 9 and show, including the source device of giving up, the source device of giving up includes carrier and collimation body, is provided with a plurality of radiation sources on the carrier, and the contained angle of a plurality of radiation sources in the longitude direction is at predetermineeing the contained angle within range, and the beam that a plurality of radiation sources on the carrier sent intersects in a public focus after the collimation body carries out the collimation.

Illustratively, as shown in FIG. 4, the carrier body is bowl-shaped, and the longitudinal direction of the carrier body is 0-360 degrees in longitude direction as shown by the arrow in FIG. 4. The carrier may be cylindrical as shown in fig. 5 (the radiotherapy apparatus is shown in fig. 11), and the longitudinal direction thereof may be the direction indicated by the arrow in fig. 5. In fig. 5, the two ends of the circular platform are the same in size, but may be different in size. The present application is not limited to the specific shape of the carrier, and the longitudinal direction in the present application will be described by taking the example shown in fig. 4 to 5 as an example.

In the present application, the included angle of the radioactive source in the longitudinal direction is within a preset included angle range, and the maximum included angle of the plurality of radioactive sources in the longitudinal direction is within the preset included angle range. In the present application, as shown in fig. 4, the included angle of the radioactive source in the longitudinal direction is an included angle formed by taking the center of the radioactive source as a reference. It should be noted that, if the radioactive source includes a row, and the centers of a plurality of radioactive sources located in the same row are on the same longitude line, the included angle of the plurality of radioactive sources 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.

For example, the radiotherapy equipment provided by the present application can be as shown in fig. 9 and fig. 10, and the carrier thereof is as shown in fig. 4, and the included angle of the plurality of radioactive sources in the longitudinal direction is a. Illustratively, the predetermined angle range A can be 5 ° -60 °, i.e., 5 ° ≦ A ≦ 60 °, and the predetermined angle range A can be any angle within the range of 5 ° -60 °, illustratively, 5 °, 8 °, 10 °, 12 °, 18 °, 20 °, 25 °, 30 °, 40 °, 45 °, 50 °, or 60 °.

The source carrier is provided with a plurality of radioactive sources, the number and arrangement of the radioactive sources are not limited in the application, and the number of the radioactive sources is generally 20-180, for example 30 or 180. Only 24 radiation sources are illustrated as an example in fig. 4. The radiotherapy equipment also comprises a collimation body, wherein collimation holes on the collimation body correspond to the number and the arrangement mode of the radioactive sources, so that beams emitted by the radioactive sources penetrate through the collimation holes and then intersect at a common focus.

According to the radiotherapy equipment provided by the application, the plurality of radioactive sources on the source carrier are distributed in the preset included angle range in the longitude direction, so that the plurality of radioactive sources can be driven by the source carrier to rotate along the central shaft of the radiotherapy equipment, and 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.

The application provides a radiotherapy equipment, and radioactive source device still includes carrier source body drive arrangement for drive carrier source body revolves around its central axis and carries out rotary motion. The driving device can be a motor, and the radiation source device can also monitor the driving of the motor and acquire the relative position of the carrier source body in real time so as to confirm whether the source is switched on or off. The carrier source body driving device and the position monitoring are not specifically limited, and the existing driving technology can be referred to, which is not described in detail herein.

During treatment, the patient's tumor needs to be precisely located at the common focus so that the radiation kills the tumor cells. However, if the patient moves during the treatment, the radiation is shifted, which is not only unfavorable for the treatment but also harmful to the health of the patient, and because the common focus of the existing radiotherapy equipment is located in the cavity of the radiation source device, whether the head of the patient moves or not can not be monitored during the treatment. The application provides a radiotherapy equipment, and public focus is located outside the terminal surface of source device. Illustratively, as shown in figures 10 and 11, the common focus is located outside the end face of the source arrangement, which facilitates observation and monitoring of patient movement during treatment.

The radiotherapy equipment provided by the application further comprises an imaging device, wherein the imaging device is arranged on one side of the radiation source device, and the common focus is positioned in an imaging area of the imaging device. Namely, the tumor of the patient in the imaging area can be imaged by the imaging device, and whether the patient is displaced or not can be confirmed according to the image. The displacement monitoring by using the image has high precision.

By way of example, the imaging device in the present application is any one of or any combination of an X-ray imaging device, a CT imaging device, an MR imaging device, a DSA imaging device, an ultrasound imaging device, or a PET imaging device. For example, the imaging device is an X-ray imaging device, which may include an X-ray tube and a flat panel detector, as shown in fig. 10. Or it may comprise two X-ray tubes, which beams intersect, and two flat panel detectors. Of course, the imaging device may also be a combination of any two or more different imaging devices, for example the imaging device may be a combination of an X-ray imaging device and a DSA imaging device. The present application is not limited to the specific arrangement of the image forming apparatus, and only the above example is used for illustration.

In the radiotherapy apparatus shown in fig. 11, the source carrier has a cylindrical shape, and the diameters of both ends of the source carrier having the cylindrical structure are the same. In the radiotherapy apparatus shown in fig. 11, the source carrier and/or the collimator may also be moved in the direction shown by the central axis of the source arrangement to switch the source. In the radiotherapy apparatus shown in fig. 12, the source carrier has a cylindrical shape, and the diameters of both ends of the source carrier have different sizes. In the radiotherapy apparatus shown in fig. 12, the source carrier and/or the collimator may also be moved in the direction shown in fig. a to realize a switching source. Of course, it may be realized by rotating the switch source, which is not limited in this application.

As shown in fig. 10, the imaging device may be provided with a fixing device to fix the bulb and the detector plate separately, or the imaging device may be provided with a driving device to drive the bulb and the detector plate to rotate separately. Alternatively, as shown in fig. 11, the imaging device may be fixedly disposed in the shielding device, and the specific position and structure of the shielding device are not limited in this application and are only exemplified by the above example.

In addition, the radiotherapy equipment also comprises a treatment bed for carrying a patient, as shown in fig. 9-12, the specific structure and motion form of the treatment bed are not limited in the present application, and the treatment bed can be a three-dimensional bed as shown in fig. 10-12, or a six-position bed as shown in fig. 10. The treatment couch can be selectively configured according to treatment requirements, and details are not described herein.

The application provides a radiotherapy equipment still is provided with between collimation body and carrier source body and prevents sinking the subassembly. Referring to fig. 9-10, the anti-sag assembly is a bearing.

The application provides a radiotherapy equipment, radioactive source device still includes shield assembly, shield assembly is located one side of radioactive source device, the beam that the radiation source sent is shielded by shield assembly after passing public focus. Illustratively, as shown in figures 10-12, the shielding means is located on one side of the common focus of the radiation source arrangement, and the radiation emitted by the radiation source passes through the common focus and is shielded by the shielding means to prevent unwanted radiation from within the treatment room. For example, the shielding device is a ring-shaped body, and all the rays of the radioactive source rotating around the central shaft are received by the shielding device. Alternatively, the shielding means is a shielding block which is rotatable about a central axis of the source arrangement to receive radiation after it has passed through the common focus following rotation of the radiation source. It should be noted that, the patient is carried by the treatment couch and moved, and the shielding device is provided with a channel to facilitate the movement of the treatment couch.

Hereinafter, the carrier in the present application will be specifically described.

The application provides a source carrier, is provided with a plurality of radiation sources on this source carrier, and the contained angle of a plurality of radiation sources in the longitude direction is in predetermineeing the contained angle within range. For example, as shown in fig. 4, the included angle of the plurality of radiation sources in the longitudinal direction is within a preset included angle range a. Illustratively, the predetermined angle range A can be 5 ° -60 °, i.e., 5 ° ≦ A ≦ 60 °, and the predetermined angle range A can be any angle within the range of 5 ° -60 °, illustratively, 5 °, 8 °, 10 °, 12 °, 18 °, 20 °, 25 °, 30 °, 40 °, 45 °, 50 °, or 60 °. The number and arrangement of the radioactive sources are not limited in the present application, and the number of the corresponding radioactive sources may be generally 20 to 180, for example, 30 or 180. Only 24 radiation sources are illustrated as an example in fig. 4.

In the exemplary source carrier provided by the present application, in the longitudinal direction, the plurality of radioactive sources are divided into a plurality of groups, and the included angle between two adjacent groups of radioactive sources ranges from 2 ° to 15 °. In an example, in the multiple radiation sources, the included angles of any two adjacent radiation sources are the same, or the included angles of two adjacent radiation sources are different, which is not limited in this application, and fig. 4 is only an example. As shown in FIG. 4, the plurality of radiation sources 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, namely, 2 degrees B is larger than or equal to 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.

According to the source carrier provided by the application, the included angle of the plurality of radioactive sources in the latitude direction ranges from 20 degrees to 60 degrees. For example, as shown in fig. 4, the source carrier is provided with a plurality of radioactive sources within a preset 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.

By way of example, the source carrier provided by the application has an included angle of any two adjacent radioactive sources in the latitudinal direction ranging from 1 to 10 degrees. In an example, in the multiple groups of radioactive sources, the included angles of any two adjacent groups of radioactive sources in the latitudinal direction are the same, or the included angles of any two adjacent groups of radioactive sources in the latitudinal direction are different, which is not limited in this application, and fig. 4 is only an example. For example, as shown in FIG. 4, in the case of two radiation sources, the included angle between the two radiation sources in the latitudinal direction is D, the included angle D may be 1-10 degrees, i.e., 1-10 degrees, and the preset included angle D may be any included angle within the range of 1-10 degrees, and the preset included angle D may be 1 degree, 2 degrees, 3 degrees, 5 degrees, 6 degrees, 8 degrees, 9 degrees or 10 degrees, for example.

The source carrier shown in fig. 4 is exemplified by that the radioactive sources include a plurality of longitudinal rows, the radioactive sources in the same row have the same longitude, and are divided into a plurality of latitudes, and the radioactive sources in the same row have the same latitude. Furthermore, for example, non-coplanar irradiation is realized, and normal tissues are protected better, the positions of radioactive sources of the carrier provided by the application are different in the latitudinal direction. I.e., each radioactive source has a different latitude.

The application provides a carrier, the carrier is provided with a plurality of radiation source holes on, and the radiation source fixed mounting is downthehole at the radiation source. Or the source carrier is provided with a source box position matched with the shape of the source box, the source box can be fixedly arranged at the source box position, and the source box is provided with a plurality of radioactive sources. For example, as shown in fig. 6 and 7, a plurality of radioactive sources are disposed on the source box, a source box position is disposed on the source carrier, a source box is mounted in the source box position, the source box position can be a through hole or a blind hole, and a plurality of collimating holes are disposed on the source carrier, so that the beam emitted by the radioactive source can be emitted through the collimating holes. The shape and structure of the source cassette and the source cassette position are not limited in the present application, and only the examples shown in fig. 6 to 7 are used for illustration.

The source carrier is also provided with a source box connecting part for fixing a source box positioned at the source box 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 and the source cassette may be connected by a screw or a snap, and the connection and fixing manner of the source cassette and the source cassette position is not limited in the present application, and is only exemplified by the above examples.

The source carrier provided by the application is characterized in that the source box is also provided with a connecting part for taking and 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 provided by the application has the advantages that the source box is made of different materials from the source carrier. For example, the source cartridge may be formed of a tungsten alloy and the source carrier may be formed of cast iron.

The source carrier provided by the present application is bowl-shaped, also commonly referred to as pot-shaped, helmet-shaped, or hemispherical, and an example is shown in fig. 4. Alternatively, the source carrier may be cylindrical, as shown in fig. 5, and the diameters of both ends of the cylindrical shape may be the same or different, and fig. 5 illustrates the case where the diameters of both ends are the same. Alternatively, the carrier may be sheet-like. The present application does not specifically limit the specific structural shape of the source carrier, and the description is given by way of example only.

According to the source carrier, beams emitted by the radioactive sources are collimated and then intersect at a common focus, and the common focus is located on the central shaft of the source carrier, so that radiotherapy equipment can be accurately positioned. The carrier source body can be fixed and not rotate, and can also be driven by a rotating device to rotate or rotate back and forth around the central shaft in a 360-degree circumference.

The common focus is positioned outside the end face of the carrier source body. Illustratively, as shown in FIG. 8, the common focal point is located outside the end face of the carrier body. The source carrier is arranged in the whole radiotherapy apparatus, as shown in fig. 10-12, and the common focus is located outside the end face of the source arrangement. To facilitate monitoring of patient or tumor movement.

The application provides a control driving method of radiotherapy equipment, and the radiotherapy equipment is the radiotherapy equipment of this application, and the method includes:

as shown in fig. 13, the control driving method includes:

step S1: at least one exit beam angle range is obtained.

Step S2: the radiotherapy device is driven to emit beams over a range of beam angles and to intersect at a common focus.

It should be noted that, because the driving device in the radiotherapy apparatus generally sets a preset zero position, the driving angle range is determined to drive with the zero position as a reference during the radiotherapy process. In this application, the beam-exiting angular range may be an angular range included in a corresponding treatment plan prepared by a treatment physician according to a tumor image of a patient, and the angular range is an angular range driven by the driving device, and needs the radiotherapy equipment to emit a beam for irradiation treatment. For example, as shown in fig. 14, in a corresponding treatment plan prepared by a treatment physician according to a tumor image of a patient, the radiotherapy apparatus performs irradiation treatment in the B1 interval and does not perform irradiation treatment in the a1 interval (the a1 area is an irradiation area including two eyes and avoids damaging the optic nerve with rays), the beam-emitting angle range is a driving angle range in which the driving device drives the radiation source to perform irradiation in the B1 interval, and the protection angle range is a driving angle range in which the driving device drives the radiation source to perform irradiation in the a1 interval. During radiation therapy, only the irradiation is rotated within the driving angle range of the irradiation in the B1 interval, so that the irradiation of the eyes and sensitive tissues can be avoided. Illustratively, the drive angle range is a rotation angle of the motor. In the present application, if the radiotherapy apparatus rotates more than 360 °, the driving angle range also exceeds 360 °. Or, if the radiotherapy equipment rotates by more than 360 degrees, calibrating the number of rotation turns and the driving angle range corresponding to different turns.

Of course, during radiation therapy, the irradiation may be performed in a rotating manner corresponding to both the a1 region and the B1 region, and the beam-emitting angle range may be a driving angle range for irradiation in the a1 region and the B1 region, and may be 360 °, for example. At this time, the dose received by the sensitive tissue such as the optic nerve can be reduced by reducing the irradiation time to protect the sensitive tissue organ.

The application provides a control driving method, radiotherapy equipment comprises a plurality of radioactive sources, source points of the radioactive sources are in a preset angle range in the longitude direction, and the control driving method comprises the following steps: at least one beam-exiting angle range is acquired, and the radiotherapy equipment is driven to emit beams in the beam-exiting angle range and intersect at a common focus, so that sensitive tissues and organs such as eyes are protected and extra injury is avoided in the head tumor treatment process.

As shown in fig. 15, the method for controlling driving according to the present application further includes:

step S3: at least one protection angle range is obtained. At least one of the protection angle ranges is less than 360 deg..

As shown in fig. 16, when the radiotherapy apparatus performs irradiation treatment in the intervals B1 and B2 and does not perform irradiation treatment in the intervals a1 and a2 (a1 and a2 correspond to the eye region and prevent rays from damaging the optic nerve), the beam-emitting angle range is a driving angle range in which the driving device drives the radiation source to perform irradiation in the intervals B1 and B2, and the protection angle range is a driving angle range in which the driving device drives the radiation source to perform irradiation in the intervals a1 and a 2.

Step S4: the radiotherapy apparatus is driven such that the radiation source beam within the protection angle range is not emitted.

The application provides a control driving method, radiotherapy equipment comprises a plurality of radioactive sources, source points of the radioactive sources are in a preset angle range in the longitude direction, and the control driving method comprises the following steps: acquiring at least one beam-exiting angle range and at least one protection angle range, and driving the radiotherapy equipment to emit beams in the beam-exiting angle range and intersect at a common focus, wherein the beams of the radioactive source in the protection angle range are not emitted. Therefore, sensitive tissues and organs such as eyes can be protected in the treatment process of the head tumor, and additional injury is avoided.

Illustratively, at least one of the exit angular ranges is adjacent to one of the protection angular ranges. As shown in fig. 16, the irradiation treatment is performed in the B1 and B2 intervals, and the irradiation treatment is not performed in the a1 and a2 intervals, and since the B1 interval and the a1 interval are adjacent, the outgoing beam angle range corresponding to the B1 interval and the protection angle range corresponding to the a1 interval are adjacent.

According to the control driving method, a plurality of beam-out angle ranges are obtained, and the speeds of the radiotherapy equipment in at least two beam-out angle ranges are different. For example, referring to fig. 16, when B1 and B2 intervals are irradiated, a beam-emitting angle range corresponding to B1 interval and a beam-emitting angle range corresponding to B2 interval are obtained, and the speed of the radiotherapy apparatus in the beam-emitting angle range corresponding to B1 interval is V1, the speed of the radiotherapy apparatus in the beam-emitting angle range corresponding to B2 interval is V2, and V1 ≠ V2, so that the irradiation time at different positions can be adjusted by speed to adjust the dose of the focus.

For example, as shown in fig. 14, when the irradiation is performed in a rotation manner corresponding to both the a1 region and the B1 region during the radiation therapy, the beam-emitting angle range is the driving angle range in which the irradiation is performed in the a1 region and the B1 region. It may be that the speed in the outgoing angle range corresponding to the B1 interval is V1, the speed in the outgoing angle range corresponding to the a1 interval is V2, and V1 < V2. I.e. such that the velocity at the a1 interval is greater than the velocity at the B1 interval, thereby reducing the dose received by sensitive tissues in the a1 interval to protect sensitive tissue organs.

In the present application, the drive angle range is a rotation angle of the motor, and the drive angle range also exceeds 360 °. E.g. the motor exceeds 360 deg., the number of revolutions is calibrated and the range of drive angles for different numbers of revolutions. The speeds of the radiotherapy equipment in at least two beam-emitting angle ranges are different, and the driving speeds of the radiotherapy equipment corresponding to the same irradiation interval are different when different numbers of turns are available. For example, when the planned treatment time is 2min and one rotation of the motor drive takes 1min, as shown in fig. 16, the drive speed for irradiation in the B1 region in the first rotation-out angle range is V1, and the drive speed for irradiation in the B1 region in the second rotation-out angle range is V2, where V1 ≠ V2.

The control driving method provided by the application is used for example, as shown in the above, two beam-exiting angle ranges with different speeds are adjacent.

The control driving method provided by the application drives the radiotherapy equipment to reciprocate in the beam-emitting angle range. For example, if only one exit beam angular range is acquired, the radiotherapy device may be reciprocated within the extracted exit beam angular range to increase the dose received by the tumour. Of course, if a plurality of exit beam angle ranges are obtained, the radiotherapy device may also increase the dose received by the tumor by reciprocating within the exit beam angle ranges.

In the exemplary radiotherapy apparatus shown in figures 10-12, the common focus is located outside the end face of the source arrangement. The radiotherapy apparatus further comprises an imaging device, the common focus being located within an imaging region of the imaging device. As shown in fig. 17, the drive control method further includes:

step S6: an imaging device is controlled to acquire an image of a patient.

Step S7: from the patient image, the beam angle range is confirmed.

It should be noted that the exit beam angle range in step S1 may be an exit beam angle range confirmed by the treating physician according to the image of the patient before the radiotherapy, and the exit beam angle range may be confirmed or adjusted according to the acquired image during the treatment.

As an example, as shown in the radiotherapy apparatus of fig. 10-12, the radiotherapy apparatus further comprises an imaging device, the common focus is located within an imaging region of the imaging device; as shown in fig. 18, the drive control method further includes:

step S8: an imaging device is controlled to acquire an image of a patient.

Step S9: the protection angle range is confirmed from the image of the patient.

Similarly, the protection angle range in step S3 may be a protection angle range confirmed by the treating physician according to the image of the patient before the radiation treatment, and the protection angle range may be confirmed or adjusted according to the acquired image during the treatment.

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 (17)

1. The source carrier is characterized in that a plurality of radioactive sources are arranged on the source carrier, and included angles of the radioactive sources in the longitude direction are within a preset included angle range; the carrier source body is bowl-shaped, cylindrical or sheet-shaped.

2. The source carrier according to claim 1, wherein the predetermined included angle is in the range of 5 ° to 60 °.

3. The source carrier of claim 1, wherein the plurality of radiation sources are grouped into longitudinal groups, and the angle between two adjacent groups of radiation sources is in the range of 2 ° to 15 °.

4. The source carrier of claim 1, wherein the plurality of radioactive sources are included at an angle ranging from 20 ° to 60 ° latitudinally.

5. The source carrier of claim 1, wherein any two adjacent radioactive sources are angled in the range of 1 ° to 10 ° in the latitudinal direction.

6. The source carrier of claim 1, wherein the radioactive source is latitudinally diverse in position.

7. The source carrier of claim 1, wherein a plurality of source apertures are provided on the source carrier, and the source is fixedly mounted in the source apertures; alternatively, the first and second electrodes may be,

the source carrier is provided with a source box position matched with the source box in shape, the source box can be fixedly arranged at the source box position, and the source box is provided with the plurality of radioactive sources.

8. The source carrier of claim 7, wherein the source cassette further comprises a connecting portion for replacing the source cassette.

9. The source carrier of claim 7, wherein the source magazine is of a different material than the source carrier.

10. The source carrier of claim 1, wherein the beams from the plurality of radiation sources are collimated to intersect at a common focal point, the common focal point being located on a central axis of the source carrier.

11. The source carrier of claim 10, wherein the source carrier rotates circumferentially or reciprocally around the central axis through 360 °.

12. Radiotherapy apparatus, characterized in that it comprises a source arrangement comprising a carrier according to any of claims 1-11 and a collimator body, the beams from the sources on the carrier being collimated by the collimator body and intersecting at a common focus.

13. Radiotherapy apparatus according to claim 12, wherein the source arrangement further comprises a source carrier drive arrangement for driving the source carrier in rotational movement about its central axis.

14. Radiotherapy apparatus according to claim 12, characterized in that the common focus is located outside the end face of the source arrangement.

15. Radiotherapy apparatus according to claim 14, further comprising imaging means disposed to one side of the source means, the common focus being located within an imaging region of the imaging means.

16. Radiotherapy apparatus according to claim 15, characterized in that the imaging device is any one of an X-ray imaging device, a CT imaging device, an MR imaging device, a DSA imaging device, an ultrasound imaging device or a PET imaging device or any combination thereof.

17. Radiotherapy apparatus according to claim 14, wherein the source arrangement further comprises a shield arrangement to one side of the source arrangement, the radiation source emitting a beam which passes through the common focus and is shielded by the shield arrangement.

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