WO2017197557A1

WO2017197557A1 - Source loading device for radiotherapy equipment and source loading method

Info

Publication number: WO2017197557A1
Application number: PCT/CN2016/082191
Authority: WO
Inventors: 于新生; 邓奇; 刁修民
Original assignee: 深圳市医科信医疗技术有限公司
Priority date: 2016-05-16
Filing date: 2016-05-16
Publication date: 2017-11-23

Abstract

Disclosed is a source loading device (200) for radiotherapy equipment (100). The radiotherapy equipment (100) comprises at least a base (10), a host (20) arranged on the base (10), and a source storage box (30). The host (20) comprises at least a shield (21), a source body (22) and a collimator (23), which are enclosed successively, with a cavity (231) having an opening being formed inside the collimator (23), and with a plurality of radiation sources (31) being accommodated inside the source storage box (30). A loading passage (40) for a communication cavity (231) is formed between the host (20) and the base (10). The source loading device (200) comprises a first source loading part (210) and a second source loading part (220). The first source loading part (210) is arranged at the opening of the cavity (231) and comprises a fixed unit (211), a rotating unit (212) and a source loading rod (213), the source loading rod (213) being provided with a first connection part (2133), and each radiation source (31) being provided with a second connection part (311) correspondingly engaged with the first connection part (2133). The second source loading part (220) is arranged on the base (10) and comprises at least a source storage box delivery unit (2201) for driving the source storage box (30) to move along a specific track to a position corresponding to the loading passage (40) when source loading is needed, and the user adjusts the rotation angle of the source loading rod (213) such that the first connection part (2133) is engaged with one of the second connection parts (311).

Description

Source device and method for charging radiotherapy equipment

Technical field

The invention relates to radiotherapy technology, in particular to a source device and a charging method for a radiotherapy device.

Background technique

The core component of the gamma ray stereotactic therapy system is the radioactive source, which is generally cobalt-60 and is highly radioactive. Therefore, the transportation and installation of the radioactive source must be carried out in a shielding container, and the human body must not be in direct contact. Usually, the gamma ray stereotactic treatment device and the radioactive source are separately transported to the hospital room, and the installation of the radioactive source is performed in the hospital radiotherapy room. The transportation of radioactive sources has very strict standard requirements, and generally adopts state-certified lead irrigation. The radioactive source installation process refers to the removal of the radioactive source from the transport lead-filling and installation to the designated position of the gamma ray stereotactic treatment device. The person must not directly contact the source during installation, and the radiation amount of the human environment must be within the safe range. Inside.

Existing radioactive source installation methods usually require the installer to wear bulky radiation protection equipment, and to configure a very complicated shielding structure on the storage source and storage source delivery device, or to install in a hot chamber, and the like, The process is cumbersome, but it is still difficult to completely avoid radiation leakage.

Summary of the invention

Based on this, it is necessary to provide a source device and a charging method for a radiotherapy apparatus to solve the above technical problems.

Embodiments of the present invention provide a source device for a radiotherapy apparatus, the radiotherapy apparatus comprising at least a base, a host disposed on the base, and a storage source. The main body includes at least a shielding body, a source body and a collimating body which are sequentially covered from the outside to the inside. The collimating body is formed with a cavity containing an opening, and the storage source housings a plurality of radioactive sources. A mounting passage connecting the cavity is formed between the main body and the base. The loading device includes: a first charging portion disposed at an opening of the cavity, The first charging portion forms a shielding space with the main body, and the first charging portion includes at least a rotating unit and a charging rod, and the rotating unit is received in the shielding space and rotates relative to the main body. The loading rod is connected to the rotating unit, and can swing and move back and forth on the first loading portion following the rotation of the rotating unit, the loading rod is provided with a first connecting portion, and each of the a second connecting portion corresponding to the first connecting portion is disposed on the radiation source; and a second charging portion is disposed on the base, and at least includes a storage source conveying unit for driving the source when the source is required The storage source is moved along a specific track to a position corresponding to the mounting channel, and the user adjusts the rotation angle of the loading rod to engage the first connecting portion with one of the second connecting portions.

The embodiment of the invention further provides a source charging method, which uses the above-mentioned source device. The method includes the steps of: transporting a reservoir source to a position corresponding to the mounting channel; rotating the source rod to a position corresponding to the mounting channel, and extending into the storage port through the mounting channel, such that The first connecting portion is engaged with a second connecting portion of one of the radiation sources; the radiation source is extracted from the storage source and returned to the collimator through the mounting channel; and the loading is adjusted The rotation angle of the source rod is such that the radiation source is aligned with the shielding hole position on the collimating body; and the radiation source is inserted into the source body mounting position corresponding to the shielding hole position through the shielding hole position And extracting the loading rod from the shielding hole position, moving the storage source so that another radiation source is aligned with the mounting channel, and repeating the above steps until all the radiation sources are installed.

The charging device and the charging method for the radiotherapy device provided by the invention form a shielding space by the main body of the radiotherapy device and the loading device itself, and install the radioactive source by adjusting the angle of the charging rod, and the installation process is safe and convenient.

DRAWINGS

1 is a schematic structural view of a source device of the present invention installed on a radiotherapy apparatus;

Figure 2 is a cross-sectional view of the source device of Figure 1 mounted on a radiotherapy apparatus;

3 is a schematic internal view of the host of the radiotherapy apparatus of FIG. 1;

4 is a schematic structural view of a storage source and a radiation source of the radiotherapy apparatus of FIG. 1;

FIG. 5 is a schematic structural view of a second charging portion of the source device of FIG. 1; FIG.

Fig. 6 is a flow chart showing a method of loading the source device of Fig. 1.

detailed description

The technical solution will be further described below in conjunction with a plurality of drawings.

Referring to FIG. 1, the present invention provides a source device 200 for a radiotherapy apparatus 100 for mounting a radiation source to the radiotherapy apparatus 100. In this embodiment, the radiotherapy apparatus 100 is a gamma ray stereotactic radiotherapy apparatus.

Referring to FIG. 2 to FIG. 4 , in the embodiment, the radiotherapy apparatus 100 includes at least a base 10 , a main body 20 disposed on the base 10 , and a storage source 30 , and the base 10 can support the main body 20 and receive the shelter. Said the source 匣30. Specifically, the host 20 includes at least a shield 21, a source body 22, and a collimator 23 that are sequentially covered from the outside to the inside. In this embodiment, the source body 22 and the collimating body 23 are in the shape of a bowl. The collimating body 23 is formed with a cavity 231 including an opening. The shielding body 21 includes an opening disposed in the cavity 231. Two relatively closable screen doors 232 (see FIG. 1) are opened to open and close the opening of the collimating body 23. The source body 22 includes a plurality of mounting positions 221, and the collimating body 23 includes a plurality of shielding hole positions 233, at least one zero position 234, and an inner ring gear 235, and the plurality of shielding hole positions 233 correspond to the mounting. The position 221 is disposed. The shield hole 233 is respectively received with a shielding rod 236. The zero position 234 is a transition hole for temporarily placing the shielding rod 236 to be the same size as the other shielding hole positions 233. A plurality of radiation sources 31 are housed in the reservoir 30. In this embodiment, the radiation source 31 is cobalt-60. A mounting passage 40 communicating with the cavity 231 is formed between the main body 20 and the base 10 for the passage of the radiation source 31. The sidewall of the mounting passage 40 is preferably shielded from gamma rays. metallic material. In this embodiment, the mounting channel 40 can be the source body 22 of the radiotherapy apparatus 100 and the driving shaft of the collimating body 23.

The source device 200 includes at least a first source portion 210 and a second source portion 220. In this embodiment, the first charging unit 210 is mounted on the top of the radiotherapy apparatus 100, the first charging unit 210 forms a shielding space with the main unit 20, and the second charging unit 220 is disposed. Between the host 20 and the base 10. Specifically, the first charging portion 210 is disposed at an opening of the cavity 231.

In this embodiment, the first charging unit 210 includes a fixing unit 211, a rotating unit 212, and a source rod 213.

The fixing unit 211 is fixed on the shielding body 21 of the radiotherapy apparatus 100, and the air is closed. The opening of the cavity 231 is such that the host 20 and the fixing unit 211 together form the shielding space. In this embodiment, the fixing unit 211 has a semicircular shape and is fixedly connected to the shielding door 232 of the shielding body 21 by screws. More specifically, the fixing unit 211 includes two positioning plates 2111 respectively fixed on the screen door 232, and a slit 2112 is formed between the two positioning plates 2111 (please refer to FIG. 1).

The rotating unit 212 is housed in the shielding space. Specifically, the rotating unit 212 is partially clamped in the slit 2112, and the other portion is housed in the cavity 231 of the collimating body 23, and is rotatable relative to the fixing unit 211 and the radiotherapy apparatus 100. In this embodiment, the rotating unit 212 penetrates the center thereof through a cross bar 2121, and both ends of the cross bar 2121 are fixed on the side wall of the positioning plate 2111 so as to be fixed between the positioning plates 2111. It should be noted that, in some embodiments, because the rotating unit 212 may have a large thickness, a bottom of the two positioning plates 2111 is provided with a receiving slot (not labeled), and the receiving slot communicates with the slot. 2112, to accommodate a portion of the rotating unit 212.

The loading rod 213 penetrates the fixing unit 211 and the rotating unit 212, is rotatable about its own axis, and can swing in the fixing unit 211 following the rotation of the rotating unit 212 and back and forth with respect to the fixing unit 211 motion. In this embodiment, the loading rod 213 is connected to the rotating unit 212 through the slit 2112, and can swing along the slit 2112 by at least 72 degrees. More specifically, the loading rod 213 includes a solid rod body 2131 and a hollow rod body 2132 that is sleeved outside the solid rod body 2131. The solid rod body 2131 is provided with a first connecting portion 2133 at one end and the other end is exposed at the other end. The fixing unit 211 is externally provided for the user to grasp. In this embodiment, the loading rod 213 is covered with a rubber sleeve for convenient grasping by the user, and the first connecting portion 2133 is internally threaded. A second connecting portion 311 corresponding to the first connecting portion 2133 is disposed on each of the radiation sources 31. In this embodiment, the second connecting portion 311 is an external thread.

Specifically, in order to cooperate with the loading rod 213, in the embodiment, each of the shielding bars 236 is externally provided with an external thread corresponding to the first connecting portion 2133, and each of the shielding rods 236 The bottom of the bottom is provided with a stopping structure (not shown) such that the shielding rod 236 cannot rotate in the shielding hole position 233, and the loading rod 213 is screwed in the axial direction thereof to cause the internal thread to be screwed with the external thread, thereby The shield bar 236 is grasped. Further, a bottom of each of the radiation sources 31 is provided with a stopper structure 312 such that the radiation source 31 The source rod 213 cannot be rotated, and the loading rod 213 is screwed in the axial direction of the first connecting portion 2133 and the second connecting portion 311 to grasp the radiation source 31. The external thread of the radiation source 31 and the shielding rod 236 and the internal thread of the end of the loading rod 213 are the same. In this embodiment, the stopping structure 312 is a regular hexahedral column structure.

It should be further noted that the first loading portion 210 is further provided with a driving gear (not shown) to mesh with the inner ring gear 235 of the collimating body 23, when the source body 22 and the collimating body After the relative position of the body 23 is fixed, the driving gear drives the collimating body 23 and the source body 22 to rotate synchronously with respect to the first charging portion 210. In this embodiment, the drive gear is disposed at the bottom of the fixing unit 211.

Referring to FIG. 5, the second charging portion 220 includes at least a storage source conveying unit 2201 for driving the storage port 30 to move along a specific orbit to a position corresponding to the mounting channel 40 when a source is required to be loaded. . At this time, the user engages the first connecting portion 2133 with the second connecting portion 311 of one of the radiation sources 31 by adjusting the rotation angle of the loading rod 213. Specifically, the storage source transport unit 2201 includes a source buffer driving unit 2211, a source/push rod 2212, and a source channel 2213. The source channel 2213 is in communication with the mounting channel 40, and the source pedal 2212 is received in the source channel 2213. In this embodiment, two of the source buffer driving units 2211 are symmetrically distributed on both sides of the source channel 2213 to more smoothly transport the source port 30. When source is required, the source port is received in the source channel 2213, and the source port driving unit 2211 drives the source port pusher 2212 to push the source port 30 to the corresponding installation. The location of the channel 40. In this embodiment, the source port driving unit 2211 is a linear motor.

When the source is required, the loading rod 213 is first engaged with the shielding rod 236, and the shielding rod 236 is taken out from the shielding hole position 233 and placed in the zero position 234 on the collimating body 23. Then, the storage source 30 is transported to a position corresponding to the mounting channel 40, the loading rod 213 is rotated to a position corresponding to the mounting channel 40, and protrudes into the storage port 30 through the mounting channel 40. The first connecting portion 2133 is engaged with the second connecting portion 311 of one of the radiation sources 31. The source 31 is evacuated from the reservoir 30 and returned to the collimator 23 through the mounting channel 40. Adjusting the rotation angle of the loading rod 213 such that the radiation source 31 is aligned with the shielding hole position 233 on the collimating body 23, and the radiation source 31 is extended into the corresponding position through the shielding hole position 233. The source hole mounting position 221 of the shield hole position 233 is described. After the radiation source 31 is fixed, the loading rod 213 is taken out from the screen The masking position 233 is extracted. When the radiation source 31 is removed, the storage unit 30 is moved by the storage unit 30, the other source 31 is aligned with the mounting channel 40, and the source 22 and the collimator 23 are rotated and repeated. The above operation until all the radiation sources 31 are mounted in place.

Referring to FIG. 6, the present invention further provides a method for loading a source, which is loaded by the source device 200 described above. The method includes the following steps:

In step S501, the shielding rod 236 in the shielding hole position 233 is moved to the zero position 234 by the loading rod 213.

In step S502, the reservoir 30 is transported to a position corresponding to the mounting channel 40.

Step S503, the loading rod 213 is rotated to a position corresponding to the mounting channel 40, and protrudes into the storage port 30 through the mounting channel 40, so that the first connecting portion 2133 and one of the radiation sources 31 The second connecting portions 311 are joined.

In step S504, the radiation source 31 is extracted from the reservoir 30 and returned to the collimator 23 through the mounting channel 40.

In step S505, the rotation angle of the loading rod 213 is adjusted such that the radiation source 31 is aligned with the shielding hole position 233 on the collimating body 23.

Step S506, the radiation source 31 is extended through the shielding hole position 233 into the source mounting position 221 corresponding to the shielding hole position 233.

In step S507, the loading rod 213 is extracted from the shielding hole position 233.

In step S508, the shield bar 236 is placed back into the shield hole position 233.

In step S509, the storage source 30 is moved so that the other radiation source 31 is aligned with the mounting channel 40, and the above steps S501 to S509 are repeated until the installation of all the radiation sources 31 is completed.

The charging device 200 and the charging method for the radiotherapy apparatus 100 provided by the present invention form a shielding space by the main body 20 of the radiotherapy apparatus 100 and the charging device 200 itself, and the radiation source 31 is installed by adjusting the angle of the charging rod 213, The installation process is safe and convenient.

The above-mentioned embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be attached The claims are subject to.

Claims

A charging device for a radiotherapy apparatus, the radiotherapy apparatus comprising at least a base, a main body disposed on the base, and a storage source, the main body including at least a shield body, a source body, and a quasi-cover from the outside to the inside a body having a cavity containing an opening, the storage source housing a plurality of radiation sources, wherein a space is formed between the main body and the base to communicate with the cavity The installation channel, the source device includes:

a first charging portion is disposed at an opening of the cavity, the first charging portion forms a shielding space with the main body, and the first charging portion includes at least a rotating unit and a charging rod, The rotation unit is housed in the shielding space and rotates relative to the main body, and the loading rod is connected to the rotating unit, and can swing and reciprocate on the first charging portion following the rotation of the rotating unit. a first connecting portion is disposed on the source rod, and each of the radiation sources is provided with a second connecting portion correspondingly engaging the first connecting portion;

The second charging portion is disposed on the base and includes at least a storage source transport unit for driving the storage source to move along a specific track to a position corresponding to the mounting channel when the source is required to be installed, and the user adjusts The rotation angle of the loading rod is such that the first connecting portion engages with one of the second connecting portions.
The sourcing apparatus for a radiotherapy apparatus according to claim 1, wherein said radiotherapy apparatus comprises two slidable doors that are relatively closable, said first sourcing portion further comprising a fixing unit, said fixing The unit includes two positioning plates respectively fixed on the shielding door, a gap is formed between the two positioning plates, the rotating unit is partially clamped in the gap, and the loading rod passes through the The slit connects the rotating unit and is swingable along the slit by at least 72 degrees.
The source device for a radiotherapy apparatus according to claim 2, wherein the positioning plate on both sides of the slit is provided with an angular scale for indicating the rotation angle of the loading rod.
The source device for a radiotherapy apparatus according to claim 1, wherein said source rod is rotatable along an axis thereof, said source rod includes a solid rod body and a hollow rod body that are sleeved to each other, said A connecting portion is formed at one end of the solid rod body, and the other end of the solid rod body is exposed outside the fixing unit for the user to grasp.
The source device for a radiotherapy apparatus according to claim 1, wherein the source body comprises a plurality of mounting positions, the collimating body includes a plurality of shielding holes corresponding to the mounting position and is mounted An inner ring gear, the first loading portion is provided with a driving gear meshing with the inner ring gear, and the driving gear drives the collimating body when the source body is fixed relative to the collimating body And the source body rotates synchronously with respect to the first source portion.
The device for charging a radiotherapy apparatus according to claim 5, wherein the shielding hole contains a shielding rod, and the first connecting portion of the charging rod is an internal thread, and each of the shielding The outer opening of the rod is provided with an external thread corresponding to the first connecting portion, and the bottom of each of the shielding rods is provided with a stopping structure so that the shielding rod cannot rotate in the shielding hole position, and the loading rod passes through the axial direction thereof. Rotating such that the internal thread is screwed with the external thread to grasp the shield rod.
A source device for a radiotherapy apparatus according to claim 6, wherein said first connecting portion is an internal thread, and said second connecting portion of each of said radiation sources is externally threaded, and each of said The bottom of the radiation source is provided with a stopping structure such that the radiation source cannot rotate in the source raft, and the loading rod is screwed along the axial direction thereof to cause the first connecting portion to be screwed with the second connecting portion to grasp and hold The radiation source, and the external thread of the radiation source and the shielding rod and the internal thread of the end of the loading rod are the same.
The source device for a radiotherapy apparatus according to claim 1, wherein said reservoir source unit comprises a source port driving unit, a source port push rod, and a source channel, said source channel and said The mounting channel is in communication. When source is required, the source port is received in the source channel, and the source port driving unit drives the source port to push the source port to the corresponding node. The location of the installation channel.
A method of loading a source, using the source device of any one of claims 1 to 8, the method comprising the steps of:

Transporting the storage source to a position corresponding to the installation channel;

Rotating the source rod to a position corresponding to the mounting channel, and extending into the storage port through the mounting channel, so that the first connecting portion is engaged with the second connecting portion of one of the radiation sources;

Pumping the source away from the reservoir and returning to the collimator through the mounting channel;

Adjusting a rotation angle of the loading rod such that the radiation source is aligned with a shielding hole on the collimating body;

Extending the radiation source through the shielding hole into a source mounting position corresponding to the shielding hole; and

The source rod is withdrawn from the shield hole position, the reservoir source is moved such that another source is aligned with the mounting channel, and the above steps are repeated until all of the source installation is completed.
The method of claim 9 , wherein the shielding hole receives a shielding rod, the collimating body is provided with at least one zero position, and the loading source rod is rotated to correspond to Before the step of storing the location of the source port, the method further comprises the steps of:

Moving the shielding rod in the shielding hole position to the zero position by the loading rod;

After the step of extracting the loading rod from the shielding hole position, the method further comprises the steps of:

Put the shield bar back into the shield hole.