CN109107053B - Intensity modulated radiotherapy device - Google Patents
Intensity modulated radiotherapy device Download PDFInfo
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- CN109107053B CN109107053B CN201810764384.2A CN201810764384A CN109107053B CN 109107053 B CN109107053 B CN 109107053B CN 201810764384 A CN201810764384 A CN 201810764384A CN 109107053 B CN109107053 B CN 109107053B
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- intensity modulated
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- 238000001959 radiotherapy Methods 0.000 title abstract description 14
- 238000002721 intensity-modulated radiation therapy Methods 0.000 claims abstract description 28
- 230000002285 radioactive effect Effects 0.000 claims abstract description 28
- GUTLYIVDDKVIGB-OUBTZVSYSA-N Cobalt-60 Chemical group [60Co] GUTLYIVDDKVIGB-OUBTZVSYSA-N 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims 1
- 229910017052 cobalt Inorganic materials 0.000 abstract 1
- 239000010941 cobalt Substances 0.000 abstract 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical group [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract 1
- 230000005855 radiation Effects 0.000 description 7
- 238000002729 3-dimensional conformal radiation therapy Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001225 therapeutic effect Effects 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 1
- 229910001080 W alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Radiation-Therapy Devices (AREA)
Abstract
The invention provides a conformal intensity modulated radiotherapy device, which comprises: the shell is provided with an accommodating space and a shielding cavity; a shield filled in the shield cavity; the source body is accommodated in the accommodating space and is used for bearing a cobalt radioactive source; the pre-collimation body is arranged at the emergent end of the radioactive source and comprises a collimation hole, and when the radioactive source is in the source opening position, the collimation hole is opposite to the radioactive source; the shielding door is arranged on one side of the pre-collimation body, which is far away from the radioactive source, and is aligned with the radioactive source; and the multi-leaf collimator is arranged outside the shell and is opposite to the shielding door, and the shielding door and the multi-leaf collimator simultaneously rotate relative to the shell. The invention also provides a conformal intensity modulated radiation therapy system.
Description
Technical Field
The invention relates to the field of radiotherapy instruments, in particular to a conformal intensity modulated radiotherapy device.
Background
The three-dimensional conformal radiotherapy is high-precision radiotherapy, a three-dimensional tumor structure is reconstructed by utilizing a CT image, a series of different irradiation fields are arranged in different directions, conformal lead blocking consistent with the shape of a focus is adopted, the distribution shape of a high-dose area is consistent with the shape of a target area in the three-dimensional direction (front-back direction, left-right direction and up-down direction), and the receiving capacity of normal tissues around the focus is reduced.
For three-dimensional conformal radiotherapy systems, the treatment head is part of the core. Most of the existing conformal treatment heads use medical linear accelerators as radioactive sources. However, the pre-equipment cost of performing linac radiation therapy is high, and the capital investment for cobalt-60 radiation therapy is low, so some manufacturers and consumers would prefer to select a cobalt-60 radiation therapy machine. However, the existing cobalt-60 therapeutic machine has a complex structure and is very heavy, which is not beneficial to installation and transportation.
Disclosure of Invention
In order to solve the technical problem, the invention provides a conformal intensity modulated radiotherapy device.
An embodiment of the present invention provides an intensity modulated radiation therapy apparatus, including: the shell is provided with an accommodating space and a shielding cavity; a shield filled in the shield cavity; the rotary carrier source body is accommodated in the accommodating space; a shielding rod accommodated in the rotary carrier; the source body is accommodated at the bottom end of the shielding rod and is used for bearing a radioactive source; the first driving part is arranged on the shell and drives the rotary source carrier to rotate around a rotating shaft of the rotary source carrier so as to switch the radioactive source between an on-source position and an off-source position; the pre-collimation body is arranged at the emergent end of the radioactive source and comprises a collimation hole, and when the radioactive source is in the source opening position, the collimation hole is opposite to the radioactive source; the shielding door is arranged on one side of the pre-collimation body, which is far away from the radioactive source, and is aligned with the radioactive source; and the multi-blade collimator is arranged outside the shell and is opposite to the shielding door.
Another embodiment of the present invention provides a conformal intensity modulated radiation therapy system, which includes a drum rack and at least one of the above mentioned conformal intensity modulated radiation therapy devices, where the conformal intensity modulated radiation therapy device is disposed on the drum rack and can rotate along with the drum rack, two connecting parts are oppositely disposed outside a housing of the conformal intensity modulated radiation therapy device, and the connecting parts are slidably connected with the drum rack, so that the conformal intensity modulated radiation therapy device can move in the direction of the central axis of the drum rack.
The conformal intensity modulated radiotherapy device has simple and compact structure and is easy to install and transport.
Drawings
Fig. 1 is a schematic structural diagram of a conformal intensity modulated radiation therapy apparatus provided in an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the conformal intensity modulated radiation therapy apparatus of FIG. 1;
FIG. 3 is a schematic structural view of a shield door of the conformal intensity modulated radiation therapy apparatus of FIG. 1;
fig. 4 is a schematic structural diagram of a conformal intensity modulated radiation therapy system according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be further described in more detail with reference to the following embodiments. It is to be understood that the described embodiments are merely some embodiments of the invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of the present invention.
Referring to fig. 1 and 2, an embodiment of the conformal intensity modulated radiation therapy apparatus 100 according to the present invention includes a housing 10, a shield 20, a rotary source carrier 30, a shielding rod 40, a source 50, a first driving portion 60, a pre-collimator 80, a shielding gate 90, a multi-leaf collimator 110, a second driving portion (not shown), and a third driving portion 120. The housing 10 accommodates the shield 20, the rotary source carrier 30, the shield rod 40, the source 50, the second driving part, the pre-alignment body 80, and the shield door 90. The shield 20 and part of the housing 10 surround the rotating carrier 30. The shielding rod 40 and the source body 50 are accommodated in the rotary source carrier 30, and the source body 50 is located at the bottom end of the shielding rod 40. Under the driving of the first driving part 60, the rotary source carrier 30 can drive the shielding rod 40 and the source 50 to rotate in the housing 10. The pre-collimating body 80 is disposed between the source body 50 and the shield door 90. The multi-leaf collimator 110 is disposed outside the housing 10 and aligned with the shield door 90. The second driving part drives the shield door 90 and the multi-leaf collimator 110 to rotate, and the third driving part 120 is used for driving the multi-leaf collimator 110 to perform conformal adjustment.
It is understood that in other embodiments, the shielding door 90 may be disposed outside the housing 10.
The housing 10 is a support for the entire conformal intensity modulated radiotherapy apparatus 100, and the external shape thereof can be designed specifically according to the requirements of the apparatus, the functional requirements, and the like, so as to achieve better therapeutic effect. In this embodiment, the housing 10 has an irregular shape, and is formed with a receiving space 11 and a shielding cavity 12, the shielding cavity 12 is used for receiving the shielding 20, and the receiving space 11 is used for receiving other components, such as the rotary source carrier 30, the shielding rod 40, the source 50, the pre-alignment body 80 and the shielding door 90. More specifically, the housing 10 includes a lower half 13 and an upper half 14 that are integrally formed. In this embodiment, the lower half portion 13 has a rectangular parallelepiped shape, and the upper half portion 14 has a substantially circular truncated cone shape. The receiving space 11 includes a first receiving space 111 and a second receiving space 112 communicating with each other, the first receiving space 111 is formed in the lower half 13 of the housing 10, the second receiving space 112 is formed in the upper half 14 of the housing 10, and the second receiving space 112 is formed with a circular opening 113 on the housing 10. The first receiving space 111 receives the pre-collimating body 80 and the shielding door 90, and the second receiving space 112 receives the rotary source carrier 30, the shielding rod 40 and the source body 50. The shielding cavity 12 is separated from the second receiving space 112 by a sidewall of the partial housing 10. In this embodiment, the shielding cavity 12 and the sidewall of the partial housing 10 surround the second receiving space 112. In addition, a through hole 15 is formed on the bottom surface of the lower half 13 of the housing 10 for the radiation passing through the shield door 90 to exit to the outside of the housing.
The shield 20 is filled in the shielding cavity 12, so that the shield 20 and the housing 10 enclose the rotary source body 50 in the middle for shielding. In this embodiment, the shield 20 is lead. It is understood that in other embodiments, other substances with better shielding properties may be filled inside the housing 10.
The rotary carrier 30 is mounted in the second receiving space 112 through a bearing (not shown), and is driven to rotate by the first driving unit 60. In this embodiment, the rotating source carrier 30 is cylindrical, and an eccentric hole 31 is formed in the rotating source carrier 30.
The shielding rod 40 is received in the eccentric hole 31 and rotates along with the rotary carrier 30. In this embodiment, the material of the shielding bar 40 is tungsten or tungsten alloy.
The source body 50 is disposed at the bottom end of the shielding rod 40 and accommodated in the eccentric hole 31 for carrying a radioactive source. In this embodiment, the source 50 is a cuboid, formed by a collection of multiple Co-60 sources, with the largest face of the source 50 facing the treatment center, and the conformal intensity modulated radiotherapy apparatus 100 rotates with a drum (further described in FIG. 3) to make the penumbra smaller in all directions. The shielding rod 40 and the source body 50 may be rotated with the rotating carrier body 30.
The first driving part 60 is disposed on the housing 10 to drive the rotating carrier 30 to rotate around its own rotation axis, so as to switch the radioactive source between an on-source position and an off-source position. More specifically, the first driving part 60 is fixed to an opening side of the second receiving space 112. In this embodiment, the first driving part 60 is a motor, and the motor drives the rotary carrier 30 to rotate through a motor bevel gear.
The pre-collimating body 80 is fixedly arranged at the exit end of the radioactive source and is formed with a collimating hole 81 for preliminarily guiding the rays of the radioactive source. When the rotating source carrier 30 is rotated to a specific position, i.e. the open position, the radiation source on the source body 50 is aligned with the collimating aperture 81 of the pre-collimating body 80. When the rotating source carrier 30 is rotated to another specific position, i.e. the off-position, the radiation source is offset from the collimating aperture 81.
Referring to fig. 3, the shielding door 90 is disposed on a side of the pre-collimating body 80 away from the radiation source and aligned with the radiation source. The shielding door 90 is used for shielding the radioactive source when the radioactive source is in the source-off position. Especially, when the treatment head is in a non-treatment state, multiple shielding can be achieved on rays through the rotary source carrier 30, the pre-collimation body 80 and the shielding door 90, and the safety of the surrounding environment is guaranteed. In this embodiment, the shielding door 90 is made of tungsten or an alloy thereof. Specifically, the screen door 90 includes two fixed door panels 91, two movable door panels 92, and a door frame (not shown), and the two fixed door panels 91 are respectively and vertically embedded in the movable door panels 92 on the same plane. The fixed door panel 91 is fixedly connected to the door frame, the movable door panel 92 is connected to the door frame via a sliding guide 93, and the movable door panel 92 is movable relative to the door frame. The door frame is connected to the housing 10 by a bearing so that the shield door 90 can rotate with respect to the housing 10. When the movable door panel 92 moves relative to the door frame, a square opening can be enclosed by the intersection position between the movable door panel 92 and the fixed door panel 91, and the size of the opening can be adjusted by adjusting the position of the movable door panel 92. The opening is sized to open to a predetermined width during treatment and to ensure that no unintended radiation escapes. In the non-treatment state, the rotary source body 50, the pre-collimation body 80 and the shielding door 90 are closed in sequence, and multiple shielding is achieved on the ray.
The multi-leaf collimator 110 is disposed outside the housing 10 and opposite to the shield door 90. The through hole 15 on the bottom surface of the housing 10 is aligned with the shield door 90 and the collimating hole 81 of the pre-collimating body 80, and the multi-leaf collimator 110 is disposed on both sides of the through hole 15. In this embodiment, the multi-leaf collimator 110 can also rotate around the central axis of the collimating hole 81, so that the multi-leaf collimator 110 can be changed more flexibly. More specifically, the second driving part is provided on the housing 10 and can simultaneously drive the shield door 90 and the multi-leaf collimator 110 to rotate relative to the housing, whereby more radiation exit shapes can be provided. The multi-leaf collimator 110 is connected to a third driving part 120, and the third driving part 120 is composed of a plurality of small motors for driving each leaf of the multi-leaf collimator 110 to move to complete the conformal operation. It will be appreciated that in some embodiments, the multi-leaf collimator 110 and the second drive section may also be disposed within the housing 10.
Referring to fig. 4, the present invention further provides a conformal intensity modulated radiation therapy system 200, which includes a roller frame 201 and at least one of the conformal intensity modulated radiation therapy apparatuses 100. The conformal intensity modulated radiotherapy device 100 is arranged on the roller frame 201 and can rotate along with the roller frame 201. In addition, two connecting portions 17 (see fig. 1) are oppositely disposed outside the housing 10 of the conformal intensity modulated radiation therapy apparatus 100, and the connecting portions 17 are slidably connected to the drum rack 201, so that the conformal intensity modulated radiation therapy apparatus 100 can move in the central axis direction of the drum rack 201, and thus the incident angle is changed by axial swinging.
The intensity modulated radiation therapy apparatus 100 of the present invention has a simple and compact structure, and is easy to install and transport.
The above disclosure is only a preferred embodiment of the present invention, and certainly should not be construed as limiting the scope of the invention, which is defined by the claims and their equivalents.
Claims (10)
1. An apparatus for conformal intensity modulated radiation therapy, comprising:
the shell is provided with an accommodating space and a shielding cavity;
a shield filled in the shield cavity;
the source body is accommodated in the accommodating space and is used for bearing a cobalt 60 radioactive source;
the pre-collimation body is arranged at the emergent end of the radioactive source and comprises a collimation hole, and when the radioactive source is in the source opening position, the collimation hole is opposite to the radioactive source;
the shielding door is arranged on one side of the pre-collimation body, which is far away from the radioactive source, and is aligned with the radioactive source; and
the multi-blade collimator is arranged outside the shell and is opposite to the shielding door;
the shield door and multi-leaf collimator rotate simultaneously relative to the housing.
2. The conformal intensity modulated radiation therapy device of claim 1, further comprising:
the rotary carrier source body is accommodated in the accommodating space;
a shielding rod accommodated in the rotary carrier;
the source body is accommodated at the bottom end of the shielding rod;
and the first driving part is arranged on the shell and drives the rotary source carrier to rotate around a rotating shaft of the rotary source carrier, so that the radioactive source is switched between an on-source position and an off-source position.
3. The conformal intensity modulated radiation therapy apparatus of claim 1, further comprising a second drive in driving connection with the shield door and multi-leaf collimator to simultaneously drive the shield door and multi-leaf collimator to rotate relative to the housing.
4. The apparatus according to claim 2, wherein the rotatable source carrier has an eccentric hole, the shielding rod and the source are received in the eccentric hole and rotate with the rotatable source carrier, and when the rotatable source carrier rotates to a specific position, the radioactive source on the source is aligned with the collimating hole of the pre-collimating body.
5. The conformal intensity modulated radiation therapy device according to claim 2, wherein the housing comprises a lower half and an upper half, the housing space comprises a first housing space and a second housing space which are communicated with each other, the first housing space is formed in the lower half of the housing, the second housing space is formed in the upper half of the housing, the shielding cavity surrounds the second housing space, the pre-collimating body and the shielding door are housed in the first housing space, and the rotary carrier, the shielding rod and the source body are housed in the second housing space.
6. The apparatus of claim 5, wherein the bottom of the lower half has a through hole aligned with the shielding door and the collimating holes of the pre-collimating body, and the multi-leaf collimator is disposed on both sides of the through hole.
7. The conformal intensity modulated radiation therapy apparatus of claim 5, wherein said lower half portion is rectangular parallelepiped shaped and said upper half portion is substantially circular truncated cone shaped.
8. The conformal intensity modulated radiation therapy apparatus according to claim 5, wherein the first driving portion is fixed at one side of the opening of the second receiving space.
9. The apparatus of claim 1, wherein the multi-leaf collimator is in transmission connection with a third driving part, and is driven by the third driving part to perform conformal adjustment.
10. The conformal intensity modulated radiation therapy system comprises a roller frame and at least one conformal intensity modulated radiation therapy device according to any one of claims 1 to 9, wherein the conformal intensity modulated radiation therapy device is arranged on the roller frame and can rotate along with the roller frame, two connecting parts are oppositely arranged outside a shell of the conformal intensity modulated radiation therapy device, and the connecting parts are connected with the roller frame in a sliding mode, so that the conformal intensity modulated radiation therapy device can move in the direction of the central axis of the roller frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810764384.2A CN109107053B (en) | 2015-08-27 | 2015-08-27 | Intensity modulated radiotherapy device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510536246.5A CN105031832B (en) | 2015-08-27 | 2015-08-27 | Conformal modulating radiotherapy device |
| CN201810764384.2A CN109107053B (en) | 2015-08-27 | 2015-08-27 | Intensity modulated radiotherapy device |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510536246.5A Division CN105031832B (en) | 2015-08-27 | 2015-08-27 | Conformal modulating radiotherapy device |
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| CN109107053A CN109107053A (en) | 2019-01-01 |
| CN109107053B true CN109107053B (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810764384.2A Active CN109107053B (en) | 2015-08-27 | 2015-08-27 | Intensity modulated radiotherapy device |
| CN201510536246.5A Active CN105031832B (en) | 2015-08-27 | 2015-08-27 | Conformal modulating radiotherapy device |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510536246.5A Active CN105031832B (en) | 2015-08-27 | 2015-08-27 | Conformal modulating radiotherapy device |
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| CN (2) | CN109107053B (en) |
| WO (1) | WO2017032345A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109107053B (en) * | 2015-08-27 | 2020-09-08 | 西安大医集团股份有限公司 | Intensity modulated radiotherapy device |
| CN110326057B (en) * | 2017-04-17 | 2023-09-15 | 西安大医集团股份有限公司 | Get and put source frock, intelligent dolly and get and put source system |
| CN107837465B (en) * | 2017-11-21 | 2024-05-14 | 西安大医集团股份有限公司 | Source guiding device and system |
| CN107890612A (en) * | 2017-12-05 | 2018-04-10 | 西安大医数码科技有限公司 | One kind focuses on radiotheraphy device and equipment |
| CN108478942A (en) * | 2018-05-10 | 2018-09-04 | 江南大学附属医院 | A kind of oncology radiotherapeutic positioning device |
| CN111714791B (en) * | 2020-06-19 | 2022-06-03 | 新里程医用加速器(无锡)有限公司 | Radiotherapy device |
| CN113813514B (en) * | 2020-06-19 | 2024-09-17 | 西安大医集团股份有限公司 | Source guiding assembly |
| WO2022121926A1 (en) * | 2020-12-09 | 2022-06-16 | 西安大医集团股份有限公司 | Source turn-off device and treatment head |
| US11698351B1 (en) | 2022-07-29 | 2023-07-11 | King Abdulaziz University | Gamma radiography system and method of using a gamma radiography system |
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| DE69425762T2 (en) * | 1993-06-09 | 2001-04-26 | Wisconsin Alumni Research Foundation, Madison | Radiation therapy system |
| US6512813B1 (en) * | 1999-05-03 | 2003-01-28 | Franz Krispel | Rotating stereotactic treatment system |
| CN1586670A (en) * | 2004-09-15 | 2005-03-02 | 杭州华源伽玛医疗设备投资有限公司 | Rotary closing type gamma ray radiator |
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| CN2910260Y (en) * | 2006-06-02 | 2007-06-13 | 珠海市和佳医疗设备有限公司 | Radioactive source controller |
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2015
- 2015-08-27 CN CN201810764384.2A patent/CN109107053B/en active Active
- 2015-08-27 CN CN201510536246.5A patent/CN105031832B/en active Active
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2016
- 2016-09-29 WO PCT/CN2016/100811 patent/WO2017032345A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1520899A (en) * | 2003-01-30 | 2004-08-18 | 武汉康桥医学新技术有限公司 | Directional intensity ajustable radiation therapy apparatus |
| CN203659451U (en) * | 2013-12-05 | 2014-06-18 | 北京大基康明医疗设备有限公司 | Double-focusing multi-leaf collimator |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017032345A1 (en) | 2017-03-02 |
| CN109107053A (en) | 2019-01-01 |
| CN105031832A (en) | 2015-11-11 |
| CN105031832B (en) | 2018-08-21 |
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Denomination of invention: Conformal Intensity Modulated Radiation Therapy Effective date of registration: 20220818 Granted publication date: 20200908 Pledgee: Xi'an investment and financing Company limited by guarantee Pledgor: Xi'an Dayi Group Co.,Ltd. Registration number: Y2022610000505 |
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