CN209790635U

CN209790635U - Radiotherapy equipment

Info

Publication number: CN209790635U
Application number: CN201821378242.4U
Authority: CN
Inventors: 刘海峰; 李大梁
Original assignee: Our United Corp
Current assignee: Our United Corp
Priority date: 2018-08-24
Filing date: 2018-08-24
Publication date: 2019-12-17
Anticipated expiration: 2028-08-24

Abstract

the utility model discloses a radiotherapy device, which belongs to the technical field of medical instruments. The radiotherapy apparatus comprises: the radiotherapy part is used for emitting a treatment beam to a to-be-treated area of a patient, wherein the to-be-treated area of the patient is positioned outside the radiotherapy part; the imaging part is arranged adjacent to the radiotherapy part and used for emitting imaging beams to the region to be treated of the patient. Thus, the radiotherapy part can send the treatment beam to the region to be treated of the patient according to the established treatment plan for radiotherapy without moving the position of the region to be treated of the patient, and the precision of the radiotherapy is improved.

Description

Radiotherapy equipment

Technical Field

The utility model relates to the technical field of medical equipment, in particular to radiotherapy equipment.

Background

at present, in order to improve the speed and accuracy of tumor positioning to radiotherapy, a radiotherapy apparatus generally combines a radiotherapy part and an imaging part simply, and a patient can perform radiotherapy without being moved from an imaging room with the imaging part to a treatment room with the radiotherapy part, and the radiotherapy process is as follows:

Firstly, the patient is sent into the imaging part for imaging by moving the position of the treatment bed, then a treatment plan is made according to the size, the shape, the surrounding tissues and the like of the tumor in imaging, then the patient is sent into the radiotherapy part by moving the treatment bed, the treatment bed is positioned so that the tumor position is consistent with the tumor position in the treatment plan, and finally the tumor of the patient is treated by radiation.

However, the radiotherapy device needs to reposition the treatment couch before radiotherapy of the tumor of the patient, so that positioning errors of the treatment couch exist, and the precision of radiotherapy is affected; in addition, the imaging section and the radiotherapy apparatus in the radiotherapy apparatus cannot operate simultaneously, and image guidance of a patient, particularly a patient during radiotherapy, cannot be performed in real time.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problem, an embodiment of the present invention provides a radiotherapy apparatus, which can improve the precision of radiotherapy and can guide the image of a patient in real time.

In order to achieve the purpose of the present invention, the embodiment of the present invention provides a radiotherapy apparatus, including: the radiotherapy part is used for emitting a treatment beam to a to-be-treated area of a patient, wherein the to-be-treated area of the patient is positioned outside the radiotherapy part; and the imaging part is arranged adjacent to the radiotherapy part and is used for emitting imaging beams to the to-be-treated area of the patient.

In one embodiment, the radiotherapy part comprises a first radiotherapy part and a second radiotherapy part, wherein the imaging part is located between the first radiotherapy part and the second radiotherapy part.

in one embodiment, the radiotherapy section comprises: a radiation source that emits a treatment beam focused at an intersection outside the radiotherapy section, and the intersection coincides with an imaging center of the imaging section.

in an embodiment, the radiotherapy apparatus further comprises: and the radioactive source recovery part is used for recovering and storing the radioactive source when the radiotherapy equipment does not work.

In one embodiment, the radiotherapy section comprises: the radioactive source device comprises a shielding body, a source carrier and a collimating body which are sequentially covered, wherein the radioactive source is positioned on the source carrier; the treatment beam emitted by the radioactive source is focused at the intersection point through the collimating body.

In an embodiment, the source carrier and/or the collimator: can rotate around a rotation axis and/or can move along a preset track.

In one embodiment, the imaging portion is disposed on an end face of an edge of the source carrier or the collimator rotatable along the rotation axis.

In one embodiment, the radiotherapy part is: bowl-shaped or barrel-shaped.

in one embodiment, the radiation sources are distributed on a sector of the carrier, uniformly distributed on the carrier in a spiral shape, or uniformly distributed on the carrier in a circumferential direction.

In an embodiment, the radiotherapy apparatus further comprises: the first sinking-prevention part is arranged between the shielding body and the carrier source body.

In an embodiment, the radiotherapy apparatus further comprises: and the second sinking-prevention part is arranged between the carrier source body and the collimating body.

In an embodiment, the first sinking prevention part and the second sinking prevention part are bearings.

In one embodiment, the radioactive source is disposed on a source box, and accordingly, the source carrier includes: a source cartridge mounting hole, the source cartridge being mounted in the source cartridge mounting hole.

in one embodiment, the shield includes: the radioactive source mounting structure comprises a source box shielding hole and a source box shielding block, wherein the size of the source box shielding hole is larger than or equal to that of the radioactive source mounting hole, and the source box shielding block is matched with the source box shielding hole.

in one embodiment, the imaging section includes an imaging source and an imager, a beam center axis of an imaging beam emitted from the imaging source is offset from a reference axis, and the reference axis is an axis passing through the imaging center and perpendicular to the imager.

in one embodiment, the imaging portion includes a shield disposed adjacent the radiation therapy portion for shielding the treatment beam passing through the intersection.

In one embodiment, the shield is hollow or sheet-like.

In one embodiment, the imaging section is at least one of:

An X-ray device, a CT device, an MRI device, a PET device, an ultrasound device, and a DSA device.

In an embodiment, the radiotherapy apparatus further comprises: the shielding door is used for opening or closing the radiotherapy equipment and/or shielding the treatment beam emitted by the radiotherapy part.

in an embodiment, the radiotherapy apparatus further comprises: and the treatment bed is arranged on one side of the imaging part.

Compared with the prior art, the radiotherapy equipment provided by the embodiment of the utility model comprises a radiotherapy part and an imaging part, wherein the radiotherapy part is used for sending a treatment beam to the area to be treated of the patient, and the area to be treated of the patient is positioned outside the radiotherapy part; the imaging part is arranged adjacent to the radiotherapy part and is used for emitting an imaging beam to the region to be treated of the patient. The radiotherapy part can also send the treatment beams to the same region to be treated, namely the radiotherapy part and the imaging part have the same projection target and are the regions to be treated, so that the radiotherapy part can send the treatment beams to the region to be treated of the patient according to the formulated treatment plan for radiotherapy without moving the position of the region to be treated of the patient, and the precision of the radiotherapy is improved. And during the radiotherapy, the radiotherapy equipment can perform treatment and imaging simultaneously and perform real-time image guidance on the to-be-treated area of the patient so as to keep the to-be-treated area consistent with the position in the treatment plan all the time.

Drawings

the accompanying drawings are included to provide a further understanding of the embodiments of the present invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention and not to limit the embodiments of the invention.

Fig. 1 is a schematic side view of a radiotherapy apparatus according to an embodiment of the present invention;

Fig. 2 is a schematic side view of a radiotherapy apparatus according to an embodiment of the present invention;

fig. 3 is a schematic side view of a radiotherapy apparatus according to an embodiment of the present invention;

Fig. 4 is a schematic side view of a radiotherapy apparatus according to an embodiment of the present invention;

Fig. 5 is a schematic side view of a radiotherapy apparatus according to an embodiment of the present invention;

Fig. 6 is a schematic diagram of a relationship between a central axis and a reference axis of an imaging beam provided by an embodiment of the present invention;

Fig. 7 is a schematic view of a mounting position of a shield door according to an embodiment of the present invention;

Fig. 8 is a schematic side view of a radiation therapy apparatus according to an embodiment of the present invention;

Fig. 9 is a schematic side view diagram seven of a radiotherapy apparatus according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

Fig. 1 is a schematic side view of a radiotherapy apparatus provided by an embodiment of the present invention, as shown in fig. 1, the radiotherapy apparatus includes: a radiotherapy section 10 and an imaging section 20, wherein: the radiotherapy part 10 is used for emitting a treatment beam to a region T to be treated of a patient, wherein the region T to be treated of the patient is positioned outside the radiotherapy part 10; the imaging part 20 is disposed adjacent to the radiotherapy part 10 for emitting an imaging beam to a region T to be treated of the patient.

The embodiment of the utility model provides a radiotherapy equipment, utilize imaging portion 20 to treat treatment zone T emission imaging beam to the patient, acquire the formation of image that the patient treats treatment zone T, utilize this patient to treat treatment zone T's formation of image and formulate treatment plan, because radiotherapy portion 10 also can send treatment beam to same treatment zone T of treating, radiotherapy portion 10 is the same with the projection target of imaging portion 20 promptly, be and treat treatment zone T, consequently, need not to remove patient's the position of treating treatment zone T, radiotherapy portion 10 just can send treatment beam to this patient's treatment zone T according to the treatment plan of formulating and carry out radiotherapy, and thus, radiotherapy's precision has been improved. Moreover, during the radiotherapy, the radiotherapy device can perform treatment and imaging simultaneously, and perform real-time image guidance on the region T to be treated of the patient so as to keep the region T to be treated consistent with the position in the treatment plan all the time.

In the embodiment of the present invention, the radiotherapy part 10 may be a conformal intensity modulated radiotherapy device, a Beam knife (X-ray knife), a multi-source focused radiotherapy device, etc., and the Imaging part 20 may be an X-ray device, such as a Cone Beam CT (Cone Beam CT, CBCT) device, a Computed Tomography (CT) device, a Magnetic Resonance Imaging (MRI) device, a Positron emission Computed Tomography (PET) device, an ultrasound device, a Digital subtraction angiography (DAS) device, etc.

Further, the radiotherapy part 10 may be plural, as shown in fig. 2, and includes a first radiotherapy part 10A and a second radiotherapy part 10B, wherein the imaging part 20 is located between the first radiotherapy part 10A and the second radiotherapy part 10B. The first radiotherapy part 10A and the second radiotherapy part 10B can emit the treatment beams to the region to be treated at the same time to improve the efficiency of radiotherapy.

In the case where the radiotherapy section 10 is a multi-source focused radiation therapy apparatus, as shown in fig. 3, the radiotherapy section 10 includes: the plurality of radiation sources S focus the treatment beam emitted from the plurality of radiation sources S at a point of intersection I outside the radiotherapy section 10, and the point of intersection I coincides with the imaging center R of the imaging section 20. It is understood that, if there are two radiotherapy parts 10, the first radiotherapy part 10A and the second radiotherapy part 10B respectively include a plurality of radiation sources S, the treatment beams emitted by the plurality of radiation sources S are focused at an intersection point I outside the radiotherapy part 10, and the intersection point I coincides with the imaging center R of the imaging part 20.

It is understood that the region to be treated T may contain one or more target points to be treated, and that for each radiation treatment the intersection point I of the multiple focused treatment beams coincides with one of the target points.

Further, as shown in fig. 4 and 5, the radiotherapy part 10 includes, in order from the outside to the inside: a shield 101, a source carrier 102 and a collimator 103. The shielding body 101 is used for shielding rays, the source carrier 102 is used for carrying a plurality of radioactive sources S, and the collimating body 103 has collimating passages 1031. When the collimating passages 1031 of the collimating body 103 are aligned with the plurality of radiation sources S, i.e. the radiation sources S are opened, the treatment beams emitted by the plurality of radiation sources S can be focused at the intersection point I through the collimating passages 1031 for treating the target spot of the patient. When the collimating passages 1031 of the collimating body 103 are staggered with the plurality of radiation sources S, i.e. the plurality of radiation sources S are closed, the treatment beams emitted by the plurality of radiation sources S are shielded by the collimating body 103, and the radiotherapy apparatus stops treatment. Here, the intersection I coincides with the imaging center R of the imaging section 20.

The shielding body 101 of the radiotherapy part 10 is usually made of a shielding material such as lead, tungsten, etc., the total weight of the radiotherapy part 10 is large, and due to the action of gravity, as shown in fig. 4, the radiotherapy part 10 sinks in a direction perpendicular to the rotation axis RA (arrow direction in the figure), and therefore, a first anti-sinking assembly 1041 is disposed between the shielding body 101 and the source carrier 102, and a second anti-sinking assembly 1042 is disposed between the source carrier 102 and the collimating body 103 to prevent the radiotherapy part 10 from sinking as a whole. Further, the anti-sinking assembly may be an annular bearing, such as a rolling bearing.

In order to align or misalign the collimating passages 1031 of the collimating body 103 with the plurality of radiation sources S, i.e. to open or close the radiation sources, at least two possible examples are possible:

In one possible example, as shown in fig. 4, the source carrier 102 in the radiotherapy section 10 does not rotate around the rotation axis RA, but the collimating body 103 rotates around the rotation axis RA, and the collimating passages 1031 of the collimating body 103 are aligned or misaligned with the plurality of radioactive sources S by the rotation of the collimating body 103; similarly, the source carrier 102 may be arranged to rotate around the rotation axis RA, while the collimating body 103 is not arranged to rotate around the rotation axis RA. Of course, the source carrier 102 and the collimating body 103 may also each be arranged to rotate around the rotation axis RA in different directions of rotation or at different rotational speeds.

When the collimating passages 1031 of the collimating body 103 are aligned with a plurality of radiation sources S, if the source carrier 102 and the collimating body 103 rotate together around the rotation axis RA, the radiation (treatment beam) emitted by the radiation sources S irradiates the target points at different angles, so that the long-term irradiation of the normal tissues around the target points can be avoided.

In another possible example, as shown in fig. 5, the source carrier 102 in the radiotherapy section 10 does not move along the preset trajectory a, but the collimating body 103 moves along the preset trajectory a, and the collimating passages 1031 of the collimating body 103 are aligned or staggered with the plurality of radioactive sources S by the movement of the collimating body 103; similarly, the source carrier 102 may be configured to move along the predetermined track a, and the collimator 103 may not move along the predetermined track a. Of course, the source carrier 102 and the collimating body 103 may be configured to move along the predetermined trajectory a in different moving directions or at different moving speeds.

Here, the first example is exemplified by the radiotherapy section 10 having a bowl-shaped structure, and the second example is exemplified by the radiotherapy section 10 having a cylindrical shape. Of course, the radiotherapy section 10 may have other structures, and the embodiment of the present invention is not limited to the specific shape thereof.

To facilitate the installation or replacement of the radioactive source, taking the radiotherapy section 10 as a bowl-shaped structure as an example, as shown in fig. 4, the radioactive source S can be disposed on a source cassette S1, and accordingly, the source carrier 102 includes a source cassette mounting hole 1021, and the source cassette S1 is installed in the source cassette mounting hole 1021. Further, the shield 101 includes: a source box shielding hole 1011 and a source box shielding block 1012, wherein the size of the source box shielding hole 1011 is larger than or equal to that of the source box mounting hole 1021, and the source box shielding block 1012 is matched with the source box shielding hole 1011.

In addition, the radioactive sources S mentioned above may be uniformly distributed on the source carrier 102 in a spiral shape, or may be divided into a plurality of groups, which are uniformly distributed on the sector surface of the source carrier 102, and each group of radioactive sources is arranged along the direction of the rotation axis RA, or each group of radioactive sources is uniformly distributed along the circumferential direction of the ring-shaped shield 201 of the source carrier 102.

Regardless of the manner in which the radiation source is turned on or off, the treatment beam passing through the intersection point I may leak out, and therefore, as shown in fig. 4 and 5, the imaging part 20 includes a shielding member 201 disposed adjacent to the radiotherapy part 20 for shielding the treatment beam passing through the intersection point. When the treatment beam emitted by the radiation source S passes through the intersection point I, the treatment beam can be blocked by the shielding member 201, and the leakage of rays in the treatment process is effectively prevented.

The above-mentioned shield 201 is hollow, such as ring-shaped; it may also be in the form of a sheet, for example a C-shape, which is rotatable with the radiation source S to shield the radiation (treatment beam) emitted by the radiation source S at any time, but the thickness of the shield 201, the size of the hollow central opening, and the size of the sheet can be set according to the direction and intensity of the treatment beam passing through the intersection point I.

Further, the imaging portion 20 further includes an imaging source 202 and an imager 203, and in a possible example, as shown in fig. 4, the imaging source 202 and the imager 203 are oppositely disposed on an end surface of an edge of the source carrier 102 or the collimator 103 that is rotatable along the rotation axis RA, and the imaging source 202 and the imager 203 are rotatable along with the rotation of the source carrier 102 or the collimator 103. In another possible example, as shown in fig. 5, the imaging source 202 and the imager 203 are disposed opposite a rotating ring 204 within the shield 201, rotatable about a rotational axis RA. In other possible examples, at least two groups of the imaging sources 202 and the imagers 203 in the imaging portion 20 are oppositely disposed in the shielding member 201, and a predetermined angle, such as 90 degrees, is formed between the two groups of the imaging sources 202 and the imagers 203.

Further, in order to increase the imaging volume, as shown in fig. 6, the beam center axis L1 of the imaging beam emitted from the imaging source 202 is offset from the reference axis L2, which is L2 is an axis passing through the imaging center R and perpendicular to the imager 203. As the imaging portion 20 (e.g., the imaging source 202 and the imager 203) rotates with the radiotherapy portion 10, the imaging beam forms a larger imaging volume.

Further, the radiotherapy apparatus further comprises: and the shielding door 50 is used for opening or closing the radiotherapy equipment and/or shielding the treatment beam emitted by the radiotherapy part 10. Taking the radiotherapy part 10 as a bowl shape shown in fig. 3 as an example, as shown in fig. 7, the shielding door 50 may be disposed at the therapeutic beam outlet of the radiotherapy part 10 and/or inside the imaging part 20 and/or outside the imaging part 20, and when the radiotherapy apparatus is not in operation, if the beam emitted by the radiation source S is not completely shielded by the collimator 103, the shielding door 50 may be used to shield the unshielded rays; the screen door 50 can be used to open or close the treatment volume of the radiotherapy apparatus if the radiation beam emitted by the radiation source S is completely shielded by the collimator body 103. Of course, the shielding door 50 can also be used to shield the unshielded radiation and to open or close the treatment space of the radiotherapy device.

When the radiotherapy section 10 in the above embodiment is designed to be semi-shielded, in order to avoid leakage of the radioactive source S when the radiotherapy section 10 is not used, as shown in fig. 8, the radiotherapy apparatus further comprises: a radiation source collecting unit 30 for collecting the radiation source S into the radiation source collecting unit 30 and storing the same when the radiotherapy unit 10 does not operate.

As shown in fig. 9, the radiotherapy apparatus may further comprise: the treatment couch 40 is provided on the imaging portion 20 side, and the treatment couch 40 may be a three-dimensional couch or a six-dimensional couch.

The above description is only for facilitating the understanding of the technical solutions of the present invention by those skilled in the art, and is not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A radiotherapy apparatus, characterized by comprising:

The radiotherapy part is used for emitting a treatment beam to a to-be-treated area of a patient, wherein the to-be-treated area of the patient is positioned outside the radiotherapy part;

And the imaging part is arranged adjacent to the radiotherapy part and is used for emitting imaging beams to the to-be-treated area of the patient.

2. The radiotherapy apparatus of claim 1, wherein the radiotherapy portion comprises a first radiotherapy portion and a second radiotherapy portion, wherein the imaging portion is located between the first radiotherapy portion and the second radiotherapy portion.

3. The radiotherapy apparatus of claim 1, wherein the radiotherapy section comprises: a radiation source that emits a treatment beam focused at an intersection outside the radiotherapy section, and the intersection coincides with an imaging center of the imaging section.

4. Radiotherapy apparatus according to claim 3, characterized in that it further comprises: and the radioactive source recovery part is used for recovering and storing the radioactive source when the radiotherapy equipment does not work.

5. The radiotherapy apparatus of claim 3, wherein the radiotherapy section comprises: the radioactive source device comprises a shielding body, a source carrier and a collimating body which are sequentially covered, wherein the radioactive source is positioned on the source carrier; the treatment beam emitted by the radioactive source is focused at the intersection point through the collimating body.

6. Radiotherapy installation according to claim 5, characterized in that: the carrier source body and/or the collimating body: can rotate around a rotation axis and/or can move along a preset track.

7. Radiotherapy installation according to claim 6, characterized in that: the imaging part is arranged on the end face of the edge of the carrier or the collimating body which can rotate along the rotating shaft.

8. The radiotherapy apparatus of claim 5, wherein the radiotherapy section is: bowl-shaped or barrel-shaped.

9. Radiotherapeutic apparatus according to claim 5, wherein the radiation sources are distributed over a sector of the carrier, uniformly distributed over the carrier in a spiral or uniformly distributed over the carrier in a circumferential direction.

10. Radiotherapy apparatus according to claim 5, characterized in that it further comprises: the first sinking-prevention part is arranged between the shielding body and the carrier source body.

11. The radiotherapy apparatus of claim 10, further comprising: and the second sinking-prevention part is arranged between the carrier source body and the collimating body.

12. Radiotherapeutic apparatus according to claim 11 in which the first and second subsidence prevention features are bearings.

13. Radiotherapeutic apparatus according to claim 5, wherein the radioactive source is arranged on a source magazine, and wherein the source carrier comprises: a source cartridge mounting hole, the source cartridge being mounted in the source cartridge mounting hole.

14. Radiotherapeutic apparatus according to claim 13, wherein the shield comprises: the radioactive source mounting structure comprises a source box shielding hole and a source box shielding block, wherein the size of the source box shielding hole is larger than or equal to that of the radioactive source mounting hole, and the source box shielding block is matched with the source box shielding hole.

15. The radiotherapy apparatus of claim 3, wherein the imaging portion comprises an imaging source and an imager, a beam center axis of an imaging beam emitted by the imaging source being offset from a reference axis, the reference axis being an axis passing through the imaging center and perpendicular to the imager.

16. A radiotherapy apparatus according to claim 3, in which the imaging part comprises a shield disposed adjacent the radiotherapy part for shielding the treatment beam passing through the intersection.

17. Radiotherapeutic apparatus according to claim 16 in which the shield is hollow or sheet-like.

18. the radiotherapy apparatus of claim 1, wherein the imaging portion is at least one of:

19. Radiotherapy apparatus according to claim 1, characterized in that it further comprises: the shielding door is used for opening or closing the radiotherapy equipment and/or shielding the treatment beam emitted by the radiotherapy part.

20. Radiotherapy apparatus according to claim 1, characterized in that it further comprises: and the treatment bed is arranged on one side of the imaging part.