CN214807944U - Radiotherapy equipment - Google Patents

Abstract

The utility model belongs to the technical field of medical instruments and discloses a radiotherapy device which comprises a treatment head and a roller, wherein the treatment head is used for emitting a plurality of beams of rays, and the plurality of beams of rays are converged at a common focus; the roller is used for bearing the treatment head, the treatment head can rotate around the central axis of the roller, and the central axis of the roller passes through the common focus; the treatment head can swing along the direction of the central axis of the roller, and a plurality of ray bundles emitted by the treatment head are always converged at a common focus in the swinging process; the treatment head can rotate around the axis of the treatment head, and the axis of the treatment head passes through the common focus. The treatment head of this scheme can carry out the rotary motion around self axis in step, along the swing motion of cylinder central axis direction and around the rotary motion of cylinder central axis, and then effectively increases the beam contained angle of bundle of rays and shortens the dwell time of ray on the normal tissue beyond the focus to protect normal tissue on every side better, effectively improve the burnt skin ratio.

Description

Radiotherapy equipment

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a radiotherapy equipment.

Background

The gamma knife is a large-scale device for treating tumor, collects a plurality of gamma rays with low energy at a focus part to kill tumor at the focus part, and simultaneously leads surrounding normal tissues to bear low energy, reduces the damage of the surrounding normal tissues and protects the normal tissues. The radiation from the gamma knife can be understood as contamination except for the affected parts, so proper collimation and reliable shielding of the radiation are required, and proper irradiation angle and duration are selected to ensure that the gamma knife irradiates as little area outside the affected part as possible in the whole process of treating the patient, and the irradiation duration of the surrounding normal tissues is reduced as much as possible.

In which minimizing the effects on the normal tissues of the human body during the treatment process is another important requirement and also an important guarantee for the health of the patient, on the premise that an effective treatment is obtained.

Based on the above, there is a need for a radiotherapy apparatus designed to ensure that the tumor site of the target region is irradiated as much as possible while reducing damage to normal tissues.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an aim at: a radiotherapy apparatus is provided which is capable of better protecting surrounding normal tissue during treatment.

To achieve the purpose, the utility model adopts the following technical proposal:

there is provided a radiotherapy apparatus comprising:

a treatment head for emitting a plurality of radiation beams converging to a common focal point;

the roller is used for carrying the treatment head, the treatment head can rotate around the central axis of the roller, and the central axis of the roller passes through the common focus;

the treatment head can swing along the direction of the central axis of the roller, and a plurality of ray bundles emitted by the treatment head are always converged at the common focus in the swinging process;

the treatment head can rotate around the axis of the treatment head, and the axis of the treatment head passes through the common focus.

Specifically, the treatment head can synchronously perform rotation motion around the axis of the treatment head, swing motion along the direction of the central axis of the roller and rotation motion around the central axis of the roller, wherein the rotation motion around the axis of the treatment head enables the treatment head to realize rotation focusing irradiation, the swing motion enables the treatment head to realize non-coplanar irradiation, and the rotation motion around the central axis of the roller enables the treatment head to realize arc irradiation. With regard to the design, on one hand, the beam included angle of the ray beam is effectively increased, and the retention time of the ray on normal tissues outside the focus is shortened, so that the surrounding normal tissues are better protected, the focal skin ratio is effectively improved, and particularly, reasonable avoidance can be performed on surrounding important organs, and the dosage born by the surrounding important organs is reduced; on the other hand, the large-range and multi-angle irradiation can be realized by the small treatment head.

Optionally, still include the treatment storehouse, the treatment storehouse is followed the central axis direction of cylinder runs through the cylinder, be provided with the treatment space that holds the patient in the treatment storehouse, the treatment head set up in the periphery in treatment storehouse. Particularly, the treatment head is arranged at the periphery of the treatment bin, so that the treatment head does not need to be inserted into and invade the treatment space in the treatment bin in the whole radiotherapy process, a wider and comfortable treatment space is provided for a patient, the risk that the patient is extruded is avoided, and the use experience of the patient is improved.

As an alternative, the method further comprises the following steps:

the swinging guide rail is arranged on the roller and extends along the central axis direction of the roller;

the treatment head is connected with the swing guide rail and can move along the swing guide rail, so that in the moving process, a plurality of beams emitted by the treatment head are always converged at the common focus.

Alternatively, the swing guide rail is of a circular arc structure with the common focus as a center.

As an alternative, the treatment head also comprises a swinging shell, the treatment head is arranged in the swinging shell, and the treatment head is connected with the swinging guide rail through the swinging shell.

Optionally, the swing shell is of a box structure, and the box structure can coat the treatment head, so that ray shielding is facilitated, and the safety of an operator is protected more effectively.

Optionally, a fixed wall is disposed on the periphery of the drum, the swing guide rail is mounted on the fixed wall, and the swing housing is connected to the drum through the swing guide rail.

Alternatively, the number of the swing guide rails is two, the swing guide rails are oppositely arranged on two sides of the roller, and the swing shell is located between the two swing guide rails.

As an alternative scheme, a rotary driving assembly is arranged on the swing shell, a rotary gear ring is arranged on the therapeutic head, and the therapeutic head rotates around the axis of the therapeutic head through the meshing transmission of the rotary driving assembly and the rotary gear ring.

Optionally, the rotary driving assembly includes a rotary power member and a driving gear engaged with the rotary gear ring, and the driving gear is disposed at an output end of the rotary power member.

Specifically, through set up at the output of gyration power spare with the drive gear of gyration ring gear meshing makes gyration power spare can drive more reliably the therapeutic head rotation, and then can follow different angles and shine the focus, reduce the dwell time of ray at normal tissue, effectively improve the burnt skin ratio.

Optionally, the rotary power member is a motor.

Optionally, the radiotherapy apparatus further comprises a rotary bearing, the rotary bearing is sleeved on the periphery of the treatment head, an inner ring of the rotary bearing is connected with the treatment head, and an outer ring of the rotary bearing is connected with the swing shell.

Alternatively, the rotary gear ring is mounted at one end of the treatment head close to the radiation end face, or the rotary gear ring is mounted at one end of the treatment head far away from the radiation end face.

Specifically, the rotary gear ring is arranged on one side close to the radiation end face, so that the center of gravity of the treatment head is close to one side of the radiation end face, the centrifugal force generated when the treatment head swings along with the swing shell is reduced, and the working reliability and the service life of the radiotherapy equipment are improved. The rotary gear ring is arranged on one side far away from the radiation end face, so that a more abundant installation space can be provided for the treatment head, and the design difficulty of the treatment head is reduced.

Optionally, the rotary gear ring is arranged at one end of the treatment head far away from the slip ring assembly.

As an alternative, the treatment head further comprises a slip ring assembly, the slip ring assembly comprises a slip ring and a carbon brush, the slip ring is fixedly arranged on the outer circumferential surface of the treatment head, the carbon brush is fixedly arranged on the swinging shell, and the carbon brush is in sliding butt joint with the slip ring so as to realize power and signal transmission of the treatment head in the rotation process around the axis of the treatment head.

Specifically, on one hand, the power and signal transmission connection of the treatment head is realized through the slip ring assembly, on the other hand, the treatment head can rotate rapidly and continuously in the same direction relative to the swinging shell, so that the rotation motion of the treatment head and the swinging motion following the swinging shell can be synchronously carried out, the motion stability is higher, and the overall treatment efficiency is effectively improved. Adopt the tow chain structure to realize scheme of revolution mechanic and outside frame electric conductance among the prior art, revolution mechanic among these schemes can only reciprocating rotation, can't follow same direction continuous rotation, and the continuity of shining is poor, and this kind of revolution mechanic interferes with other motion structures easily, has restricted the whole realization of other structures of equipment and has increased the design degree of difficulty, and the structure that the electric conductance was led to is realized through the slip ring subassembly to this application, can realize the treatment head is relative swing casing is quick and the syntropy is rotatory in succession, can overcome the above-mentioned not enough among the prior art.

Optionally, the slip ring assembly is located at an end of the treatment head distal to the radiation end face.

As an alternative, the treatment head comprises:

the source box is used for bearing a plurality of radioactive sources, the radioactive sources are distributed on the end face of the source box, and the source box is arranged in the swinging shell along the axis direction of the treatment head.

Optionally, the treatment head further includes a rotary housing, the source box is disposed inside the rotary housing, and the rotary housing can rotate around the axis of the treatment head relative to the swing housing.

Optionally, the treatment head further comprises a disc collimator, on which a plurality of alignment holes corresponding to the arrangement of the radiation sources are arranged, and the disc collimator can rotate around the axis of the treatment head relative to the source box, so that the plurality of alignment holes are aligned with or staggered from the plurality of radiation sources. Further, the disc collimator is rotatably mounted to the swivel housing.

Specifically, on one hand, by arranging the rotatable disk-shaped collimator, when the rotatable disk-shaped collimator is rotated to the position where the collimation hole corresponds to the radiation source, the radiation beam emitted by the radiation source can pass through the collimation hole, and the collimation hole can collimate the radiation beam; when the collimating holes of the disk-shaped collimator are staggered with the radioactive sources, the ray beams are shielded and cannot irradiate on the focus, and the reliable switching of the opening and closing of the radioactive sources is realized through the process. On the other hand, the disc collimator is directly adjacent to the source box, only a small gap is kept, the distance between the radioactive source of the treatment head and the radioactive end face of the disc collimator can be shortened, under the condition of the same source focal length, a patient can obtain a larger treatment space, and the risk of irradiating the rays to the area outside the focus can be reduced.

Optionally, the treatment head further comprises:

the collimator gear ring is sleeved on the periphery of the disc-shaped collimator;

the collimator driving gear is meshed with the collimator gear ring;

and the collimator driving piece is arranged on the rotary shell, is in transmission connection with the collimator driving gear and drives the disk collimator to rotate through the collimator gear ring.

Optionally, the collimator driver is a motor.

Optionally, the collimator gear ring is disposed at an end of the disc collimator close to the radiation end face, the collimator driving element is disposed at an end of the rotary housing far from the radiation end face, and an output end of the collimator driving element is in transmission connection with the collimator driving gear through a worm and gear structure and a first through shaft. The self-locking of the disc collimator can be realized through the transmission of a worm gear structure, so that the disc collimator is fixed at a target position, and the reliable operation of the treatment head is further ensured.

Optionally, the treatment head further comprises a collimator bearing, the collimator bearing is sleeved on the periphery of the disc-shaped collimator, an inner ring of the collimator bearing is connected with the disc-shaped collimator, and an outer ring of the collimator bearing is connected with the rotary shell.

Optionally, the treatment head further comprises:

the sensor gear is meshed with the collimator gear ring;

and the position sensor is arranged on the rotary shell, is in transmission connection with the sensor gear and is used for detecting the position of the disc collimator.

In particular, by providing the position sensor, the position of the disc collimator can be controlled, thereby reliably controlling the switching of the radiation source between on and off.

Optionally, the position sensor and the collimator driving assembly are respectively located at two radial sides of the revolving housing.

Optionally, the position sensor is in transmission connection with the sensor gear through a second through shaft.

Optionally, the power supply of the collimator driving element and the control signal of the position sensor are both connected with the outside through the slip ring assembly.

Alternatively, the end of the pendulum housing remote from the radiation end face of the treatment head is provided with a replacement opening, from which the source magazine of the treatment head can be inserted or removed.

The utility model has the advantages that: on one hand, the treatment head can synchronously perform rotary motion around the axis of the treatment head, swing motion along the direction of the central axis of the roller and rotary motion around the central axis of the roller, so that the beam included angle of a ray bundle is effectively increased, the retention time of the ray on normal tissues outside a focus is shortened, the surrounding normal tissues are better protected, and the focal skin ratio is effectively improved. On the other hand, the treatment head is arranged on the periphery of the treatment bin, so that the treatment head does not need to be inserted into and invade the treatment space in the treatment bin in the whole radiotherapy process, a wider and comfortable treatment space is provided for a patient, the risk that the patient is extruded is avoided, and the use experience of the patient is improved.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and examples.

FIG. 1 is a schematic view of a radiotherapy apparatus (without rollers) according to an embodiment;

FIG. 2 is a schematic diagram of a second perspective of the radiotherapy apparatus (without rollers) according to the embodiment;

FIG. 3 is a full sectional view of the radiation therapy apparatus (without rollers) of the embodiment along the plane of the vertical swing rail;

FIG. 4 is a full sectional view of the radiation therapy apparatus (without rollers) according to the embodiment along the plane of the parallel swing rails;

FIG. 5 is a schematic structural diagram of a radiotherapy apparatus with a treatment head swinging to a first station according to an embodiment;

FIG. 6 is a schematic structural diagram of a radiotherapy apparatus with a treatment head swinging to a second station according to an embodiment;

fig. 7 is a schematic view of the non-coplanar motion space of the treatment head of the radiotherapy device according to the embodiment.

In fig. 1 to 6:

1. a treatment head; 101. a source cartridge; 102. a swivel housing; 103. a disk-shaped collimator; 1031. a collimating aperture; 1032. a radiation end face; 104. a collimator gear ring; 105. a collimator drive gear; 106. a collimator driver; 107. a worm and gear structure; 108. a collimator bearing; 109. a sensor gear; 110. a position sensor;

2. a drum; 21. a central axis;

3. a swing guide rail;

4. a swing case;

5. a rotary gear ring;

6. a rotary power member;

7. a drive gear;

8. a slew bearing;

9. a slip ring assembly; 901. a slip ring; 902. a carbon brush.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

A radiotherapy apparatus, as shown in figures 1 to 7, comprises a treatment head 1 and a drum 2, the treatment head 1 being arranged to emit a plurality of beams which converge at a common focus; the roller 2 is used for bearing the treatment head 1, the treatment head 1 can rotate around the central axis 21 of the roller 2, and the central axis 21 of the roller 2 passes through the common focus; the treatment head 1 can swing along the central axis 21 direction of the roller 2, and a plurality of ray bundles emitted by the treatment head 1 are always converged at a common focus in the swinging process; the treatment head 1 can rotate around the self axis, and the self axis of the treatment head 1 passes through the common focus.

Specifically, the treatment head 1 can synchronously perform rotation motion around the self axis, swinging motion along the direction of the central axis 21 of the roller 2 and rotation motion around the central axis 21 of the roller 2, wherein the rotation motion around the self axis enables the treatment head 1 to realize rotation focusing irradiation, the swinging motion enables the treatment head 1 to realize non-coplanar irradiation, and the rotation motion around the central axis 21 of the roller 2 enables the treatment head 1 to realize arc-drawing irradiation. With regard to the design, on one hand, the beam included angle of the ray bundle is effectively increased, and the retention time of the ray outside the focus on the normal tissue is shortened, so that the surrounding normal tissue is better protected, the focal skin ratio is effectively improved, and particularly, reasonable avoidance can be carried out on the surrounding important organs, and the dosage born by the surrounding important organs is reduced; on the other hand, a large range and multi-angle irradiation can be realized with a small treatment head 1.

Optionally, the radiotherapy equipment further comprises a treatment bin, the treatment bin penetrates through the roller 2 along the direction of the central axis 21 of the roller 2, a treatment space for accommodating a patient is arranged in the treatment bin, and the treatment head 1 is arranged on the periphery of the treatment bin. Particularly, the treatment head 1 is arranged at the periphery of the treatment bin, so that the treatment head 1 does not need to be inserted into and invade the treatment space inside the treatment bin in the whole radiotherapy process, a wider and comfortable treatment space is further provided for a patient, the risk that the patient is extruded is avoided, and the use experience of the patient is improved.

In this embodiment, the radiotherapy apparatus further comprises a swing guide 3, the swing guide 3 is disposed on the drum 2 and extends along the central axis 21 of the drum 2; the treatment head 1 is connected with the swing guide rail 3, and the treatment head 1 can move along the swing guide rail 3, so that a plurality of ray bundles emitted by the treatment head 1 are always converged at a common focus in the moving process.

Optionally, the swing guide rail 3 is an arc structure with the common focus as a center. Furthermore, the number of the swing guide rails 3 is two, and the swing guide rails are oppositely arranged at two sides of the roller 2, and the treatment head 1 is positioned between the two swing guide rails 3. Of course, the number of the swing guide rails 3 can be one according to the supporting capacity of the swing guide rails 3 for the treatment head. In other embodiments, the following design is also possible: the swing guide rail 3 is a linear track structure parallel to the central axis 21 of the roller 2, the treatment head 1 can move linearly along the swing guide rail 3, and in the moving process, the treatment head 1 can rotate relative to the swing guide rail 3, so that in the moving process, a plurality of ray bundles emitted by the treatment head 1 are always converged at a common focus. Likewise, the number of the linear guide rails may be one or more.

Optionally, a fixed wall is arranged on the periphery of the roller 2, the swing guide 3 is mounted on the fixed wall, and the treatment head 1 is connected with the roller 2 through the swing guide 3.

Optionally, the radiotherapy apparatus further comprises a swing shell 4, the swing shell 4 is located between the two swing guide rails 3, the treatment head 1 is arranged in the swing shell 4, and the treatment head 1 is connected with the swing guide rails 3 through the swing shell 4.

Optionally, the swing shell 4 is a box structure, and the box structure can coat the treatment head 1, so as to help shield rays and protect the safety of an operator more effectively.

Optionally, a rotation driving assembly is arranged on the swing shell 4, a rotation gear ring 5 is arranged on the treatment head 1, and the treatment head 1 rotates around the axis of the treatment head 1 through the meshing transmission of the rotation driving assembly and the rotation gear ring 5. The rotary driving assembly comprises a rotary power member 6 and a driving gear 7 meshed with the rotary gear ring 5, and the driving gear 7 is arranged at the output end of the rotary power member 6. Specifically, the output end of the rotary power part 6 is provided with the driving gear 7 meshed with the rotary gear ring 5, so that the rotary power part 6 can more reliably drive the therapeutic head 1 to rotate, the focus can be irradiated from different angles, the retention time of rays in normal tissues is reduced, and the focal skin ratio is effectively improved. Optionally, the rotary power member 6 is a motor.

Optionally, the swiveling gear ring 5 is mounted at an end of the treatment head 1 close to the radiation end face 1032, or the swiveling gear ring 5 is mounted at an end of the treatment head 1 far from the radiation end face 1032. Specifically, the rotary gear ring 5 is mounted on one side close to the radiation end face 1032, so that the center of gravity of the treatment head 1 can be close to one side of the radiation end face 1032, the centrifugal force generated in the process that the treatment head 1 swings along with the swing shell 4 can be reduced, and the working reliability and the service life of the radiotherapy equipment can be improved. By mounting the swiveling ring gear 5 on the side away from the radiation end surface 1032, a more space for mounting the treatment head 1 can be provided, which contributes to reducing the difficulty in designing the treatment head 1.

Optionally, the radiotherapy apparatus further comprises a rotary bearing 8, the rotary bearing 8 is sleeved on the periphery of the treatment head 1, an inner ring of the rotary bearing 8 is connected with the treatment head 1, and an outer ring of the rotary bearing 8 is connected with the swing shell 4.

Optionally, the radiotherapy apparatus further includes a slip ring assembly 9, the slip ring assembly 9 includes a slip ring 901 and a carbon brush 902, the slip ring 901 is fixedly disposed on the outer circumferential surface of the therapy head 1, the carbon brush 902 is fixedly disposed on the swinging housing 4, and the carbon brush 902 is slidably abutted to the slip ring 901, so as to achieve power and signal transmission during rotation of the therapy head 1 around its axis. Specifically, on the one hand, the power and signal transmission connection of the treatment head 1 is realized through the slip ring assembly 9, on the other hand, the treatment head 1 can rotate continuously in the same direction and fast relative to the swinging shell 4, so that the rotation motion of the treatment head 1 and the swinging motion of the following swinging shell 4 can be synchronously carried out, the motion stability is higher, and the overall treatment efficiency is effectively improved. Adopt the tow chain structure to realize the scheme of revolution mechanic and outside frame electric conductance among the prior art, revolution mechanic in these schemes can only reciprocating rotation, can't follow same direction continuous rotation, the continuity of shining is poor, and this kind of revolution mechanic interferes with other motion structures easily, the whole realization of having restricted other structures of equipment with increased the design degree of difficulty, the structure that the electric conductance was led to through slip ring subassembly 9 realization in this application, can realize that treatment head 1 relative swing casing 4 is quick and the syntropy is rotatory in succession, can overcome the above-mentioned not enough among the prior art.

Optionally, the slip ring assembly 9 is located at an end of the treatment head 1 distal to the radiation end face 1032, and the swing ring gear 5 is disposed at an end of the treatment head 1 distal to the slip ring assembly 9.

In this embodiment, the treatment head 1 comprises a source box 101, the source box 101 is used for carrying a plurality of radioactive sources, the radioactive sources are distributed on the end surface of the source box 101 (as shown in fig. 3, the radioactive sources are distributed on the lower end surface of the source box 101), the source box 101 is installed in the swinging shell 4 along the axis direction of the treatment head 1, namely: the radiotherapy device of the embodiment adopts a top loading mode.

Optionally, the treatment head 1 further includes a rotary housing 102, the source cartridge 101 is disposed inside the rotary housing 102, and the rotary housing 102 can rotate around its own axis of the treatment head 1 relative to the swing housing 4.

Optionally, the treatment head 1 further comprises a disc collimator 103, which is provided with a plurality of collimation holes 1031 in line with the arrangement of the radiation sources, and the disc collimator 103 can rotate around the axis of the treatment head 1 relative to the source box 101 so as to align or misalign the plurality of collimation holes 1031 with the plurality of radiation sources. Further, a disc collimator 103 is rotatably mounted to the swivel housing 102. Specifically, on the one hand, by providing the rotatable disk collimator 103, when rotated to a position where the collimation hole 1031 corresponds to the radiation source, the radiation beam emitted by the radiation source can pass through the collimation hole 1031, and the collimation hole 1031 can collimate the radiation beam; when the collimating holes 1031 of the disk collimator 103 are staggered with the radioactive sources, the radiation beams are shielded and cannot irradiate on the focal points, and the reliable switching between the opening and closing of the radioactive sources is realized through the process. On the other hand, by directly adjoining the disk collimator 103 and the source box 101 and keeping only a slight gap, the distance between the radiation source of the treatment head and the radiation end face 1032 of the disk collimator 103 can be shortened, and the risk of radiation to a region other than the focal point can be reduced while a patient can obtain a larger treatment space with the same source focal length.

Optionally, the treatment head 1 further includes a collimator gear ring 104, a collimator driving gear 105 and a collimator driving member 106, wherein the collimator gear ring 104 is sleeved on the periphery of the disk collimator 103; the collimator drive gear 105 meshes with the collimator ring gear 104; the collimator driving member 106 is mounted on the rotary housing 102, and the collimator driving member 106 is in transmission connection with the collimator driving gear 105 and drives the disk collimator 103 to rotate by the collimator gear ring 104. Optionally, the collimator driver 106 is a motor.

Optionally, the collimator gear ring 104 is disposed at an end of the disc collimator 103 close to the radial end face 1032, the collimator driver 106 is disposed at an end of the rotary housing 102 far from the radial end face 1032, and an output end of the collimator driver 106 is in transmission connection with the collimator driving gear 105 through the worm gear structure 107 and the first through shaft. The self-locking of the disc collimator 103 can be realized through the transmission of the worm gear structure 107, so that the disc collimator 103 is fixed at a target position, and the reliable operation of the treatment head 1 is further ensured.

Optionally, the treatment head 1 further includes a collimator bearing 108, the collimator bearing 108 is sleeved on the periphery of the disk collimator 103, an inner ring of the collimator bearing 108 is connected with the disk collimator 103, and an outer ring of the collimator bearing 108 is connected with the rotary housing 102.

Optionally, the treatment head 1 further comprises a sensor gear 109 and a position sensor 110, the sensor gear 109 is engaged with the collimator gear ring 104, and the position sensor 110 is mounted on the rotary housing 102 and is in transmission connection with the sensor gear 109 for detecting the position of the disc collimator 103. Specifically, by providing the position sensor 110, the position of the disc collimator 103 can be controlled, thereby reliably controlling the on and off switching of the radiation source.

Optionally, the position sensor 110 and the collimator drive assembly are located on both radial sides of the rotating housing 102.

Optionally, the position sensor 110 is in driving connection with the sensor gear 109 via a second through-shaft.

Optionally, the power source for the collimator driver 106 and the control signal for the position sensor 110 are both connected to the outside via the slip ring assembly 9.

In this embodiment, a replacement port is provided at an end of the swing case 4 away from the radiation end face 1032 of the treatment head 1, and the source cassette 101 of the treatment head 1 is loaded into or unloaded from the replacement port of the swing case 4.

In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are used in a descriptive sense and with reference to the illustrated orientation or positional relationship for purposes of descriptive convenience and simplicity of operation, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (10)

1. A radiotherapy apparatus, characterized by comprising:

a treatment head (1) for emitting a plurality of radiation beams converging at a common focal point;

a drum (2) for carrying the treatment head (1), the treatment head (1) being rotatable about a central axis (21) of the drum (2), the central axis (21) of the drum (2) passing through the common focus;

the treatment head (1) can swing along the direction of a central axis (21) of the roller (2), and a plurality of ray bundles emitted by the treatment head (1) are always converged at the common focus in the swinging process;

the treatment head (1) can rotate around the axis of the treatment head, and the axis of the treatment head (1) passes through the common focus.

2. The radiotherapy apparatus of claim 1, further comprising:

the swing guide rail (3) is arranged on the roller (2) and extends along the direction of a central axis (21) of the roller (2);

the treatment head (1) is connected with the swing guide rail (3), and the treatment head (1) can move along the swing guide rail (3) so that in the moving process, a plurality of beams emitted by the treatment head (1) are always converged at the common focus.

3. Radiotherapeutic apparatus according to claim 2, characterized in that the oscillating guide (3) is of circular arc configuration centered on the common focus.

4. Radiotherapeutic apparatus according to claim 2, further comprising a swing housing (4), the treatment head (1) being arranged within the swing housing (4), the treatment head (1) being connected with the swing guide (3) by means of the swing housing (4).

5. Radiotherapeutic apparatus according to claim 4, characterized in that said oscillating guides (3) are two in number and are arranged opposite to each other on either side of said drum (2), said oscillating shell (4) being located between said two oscillating guides (3).

6. Radiotherapeutic apparatus according to claim 4, characterized in that the oscillating shell (4) is provided with a revolving drive assembly, the treatment head (1) is provided with a revolving gear ring (5), and the rotation of the treatment head (1) around its own axis is realized by the meshing transmission of the revolving drive assembly and the revolving gear ring (5).

7. Radiotherapeutic apparatus according to claim 6, characterized in that the swivelling toothing (5) is mounted at the end of the treatment head (1) close to the radiation end face (1032) or in that the swivelling toothing (5) is mounted at the end of the treatment head (1) remote from the radiation end face (1032).

8. Radiotherapy equipment according to claim 4, characterized by further comprising a slip ring assembly (9), wherein the slip ring assembly (9) comprises a slip ring (901) and a carbon brush (902), the slip ring (901) is fixedly arranged on the outer circumferential surface of the treatment head (1), the carbon brush (902) is fixedly arranged on the swinging housing (4), and the carbon brush (902) is in sliding abutment with the slip ring (901) to realize power and signal transmission during the rotation of the treatment head (1) around its own axis.

9. Radiotherapeutic apparatus according to claim 4, characterized in that the treatment head (1) comprises:

the source box (101) is used for bearing a plurality of radioactive sources, the radioactive sources are distributed on the end face of the source box (101), and the source box (101) is installed in the swinging shell (4) along the axial direction of the treatment head (1).

10. Radiotherapeutic apparatus according to claim 9, characterized in that the end of the pendulum housing (4) remote from the radiation end face (1032) of the treatment head (1) is provided with a replacement opening, from which the source magazine (101) of the treatment head (1) is inserted or removed from the pendulum housing (4).

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