WO2014131175A1 - 一种可实现源体运动的拉杆装置及其放射装置 - Google Patents

一种可实现源体运动的拉杆装置及其放射装置 Download PDF

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Publication number
WO2014131175A1
WO2014131175A1 PCT/CN2013/071987 CN2013071987W WO2014131175A1 WO 2014131175 A1 WO2014131175 A1 WO 2014131175A1 CN 2013071987 W CN2013071987 W CN 2013071987W WO 2014131175 A1 WO2014131175 A1 WO 2014131175A1
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Prior art keywords
collimator
source body
source
moving
pull rod
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PCT/CN2013/071987
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English (en)
French (fr)
Inventor
吴中华
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深圳市奥沃医学新技术发展有限公司
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Application filed by 深圳市奥沃医学新技术发展有限公司 filed Critical 深圳市奥沃医学新技术发展有限公司
Priority to PCT/CN2013/071987 priority Critical patent/WO2014131175A1/zh
Priority to CN201380004397.5A priority patent/CN104203343B/zh
Publication of WO2014131175A1 publication Critical patent/WO2014131175A1/zh

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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
    • A61N5/1048—Monitoring, verifying, controlling systems and methods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/40—Arrangements for generating radiation specially adapted for radiation diagnosis
    • A61B6/405—Source units specially adapted to modify characteristics of the beam during the data acquisition process
    • 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
    • A61N2005/1092—Details
    • A61N2005/1095—Elements inserted into the radiation path within the system, e.g. filters or wedges

Definitions

  • Pull rod device capable of realizing movement of source body and radiation device thereof
  • the present invention relates to the field of medical devices, and more particularly to a drawbar device and a radiation device thereof for realizing a radiation dose within a certain range by turning on or off a source body in a gamma knife device. Background technique
  • a gamma knife device includes a cobalt source for generating radiation, a carrier source for placing a cobalt source, and a collimator concentric with the carrier.
  • the cobalt source is distributed at a fixed position of the source body
  • the collimator includes a plurality of collimator openings at positions corresponding to each cobalt source, and openings of the collimating openings of each collimator Different sizes.
  • the collimator rotates around the focus simultaneously with the carrier.
  • the collimator opening When the collimator opening is switched, the collimator having different opening sizes is switched by the collimator rotating the focus relative to the carrier body by a certain angle to realize the size and focus of the field fixed at a fixed opening size on the focal plane.
  • the focal dose rate fixed at this opening.
  • the invention provides a rod device capable of opening and closing a source body and a radiation device thereof for realizing an intensity adjustment function of a focus dose.
  • An embodiment of the present invention provides a lever device capable of realizing movement of a source body, comprising: a moving carrier body for carrying a source body, wherein the moving carrier body is provided with a through hole along a direction of an axis line, and a source body group mounting plate,
  • the utility model is characterized in that the source body assembly plate is provided with a slot along the axis line direction, and the moving rod is connected with the moving carrier body, and the electromagnet is pushed and pulled to be connected with the moving rod.
  • the moving rod drives the moving carrier body to move on the source group mounting plate, so that the through hole on the moving carrier body is aligned with the slot on the source group mounting plate or Staggered.
  • the utility model further comprises an electromagnet fixing plate, wherein the electromagnet fixing plate is fixedly connected to the source body group mounting plate.
  • the electromagnet fixing plate is provided with an opening for fixing the electromagnet.
  • the linear bearing is further included, and the moving carrier body is fixed on the source body group fixing plate by a linear bearing.
  • the embodiment of the invention further provides a radiation device equipped with a rod device capable of realizing the movement of the source body, comprising at least one pre-collimator, the rod device being disposed outside the pre-collimator, the pre-collimator along a collimator is disposed in the direction of the axis line, the collimator is disposed on the inner side of the pre-collimator, and the collimator is provided with at least two sets of collimating openings of different opening sizes, the movement The center of the carrier, the pre-collimator, and the collimator coincide at one point.
  • a radiation device equipped with a rod device capable of realizing the movement of the source body comprising at least one pre-collimator, the rod device being disposed outside the pre-collimator, the pre-collimator along a collimator is disposed in the direction of the axis line, the collimator is disposed on the inner side of the pre-collimator, and the collimator is provided with at least two sets of collimating openings
  • the invention further comprises a treatment head cavity, wherein the pre-collimator is mounted on the treatment head cavity, the center of the treatment head cavity coincides with the center of the pre-collimator, the collimator and the moving carrier body .
  • the moving carrier body is driven by the push-pull electromagnet, and the through hole on the moving carrier body is aligned with the slot on the source body fixing plate, the pre-collimator and the collimating opening on the collimator. Or staggered.
  • the dynamic adjustment of the focus dose is realized by the combination of the opening or closing of the source body, so that the irradiation of the tumor presents different dose fields.
  • FIG. 1 is a schematic structural view of a radiation device in a conventional gamma knife
  • FIG. 2 is a schematic cross-sectional view showing a structure of a radiation device according to an embodiment of the present invention
  • FIG. 3 is a schematic longitudinal sectional view of a radiation device according to an embodiment of the present invention. detailed description
  • the radiation device includes a treatment head cavity, a pre-collimator, a collimator, and a mobile carrier.
  • the cross section of the treatment head cavity is substantially inverted trapezoidal structure
  • the cross section of the pre-collimator is substantially trapezoidal
  • the pre-collimator is fixed on the treatment head cavity by screws.
  • the collimator has a circular cross section and is disposed on the inner side of the pre-collimator and the treatment head cavity, and is connected to the treatment head cavity through a bearing.
  • the radiation device further includes a moving carrier body, and the moving carrier body is fixed to the outside of the pre-collimator by screws and pins.
  • the source body mounted on the moving carrier body is a cobalt source, and the center of the moving carrier body in the axial direction is coincident with the center of the circle, that is, the focus is radiated.
  • the pull rod device for turning on and off the cobalt source in the radiation device includes a source body assembly plate, a push-pull electromagnet, a moving rod, an electromagnet mounting plate, and a linear bearing in addition to the moving carrier body.
  • the longitudinal section of the source body assembly plate has an inverted F-shaped structure and is fixed on the outer side of the pre-collimator, and the movable carrier body is fixed on the source body assembly plate by a linear bearing.
  • the moving carrier body is connected to the moving rod by screws and pins.
  • the moving rod is connected to the push-pull electromagnet, and the push electromagnet is mounted on the electromagnet mounting plate.
  • the longitudinal section of the electromagnet mounting plate has a rectangular structure, and an opening is provided thereon, and the electromagnet is pushed through the opening to be fixed on the electromagnet mounting plate.
  • the electromagnet mounting plate is attached to the source body mounting plate. In actual use, push the electromagnet under the action of turning on and off (not shown), push and pull the moving rod and drive the moving carrier to move on the source group mounting plate.
  • the radiation device includes four moving carrier bodies, each moving carrier body is provided with a through hole along the axis line direction, and the source body group mounting plate is along the axis.
  • the slot line is also provided with a slot matching the through hole on the moving carrier body.
  • 4 pre-collimators upper edge of each pre-collimator A collimating opening is provided in the axial direction, and a plurality of sets of collimating openings having different opening sizes are disposed on the collimator disposed inside the pre-collimator.
  • the treatment head cavity rotates around the focus, and the collimator simultaneously switches to the same set of opening sizes.
  • the push-pull electromagnet is energized, the moving rod is pushed and pulled and the moving carrier body is driven in the source group.
  • the movement on the mounting plate aligns the through hole on the moving carrier with the slot on the source group mounting plate and the alignment opening on the pre-collimator.
  • the radioactive gamma from the cobalt source.
  • the ray is focused on the axis by a pre-collimator and a collimating opening on the collimator for radiation therapy purposes.
  • the push-pull electromagnet is powered off, pushing and pulling the moving rod and driving the moving carrier body to move on the source body group fixing plate to the moving carrier body and the slot on the source body group mounting plate are completely staggered, We call this a closed source, at which point the radioactive gamma rays from the cobalt source cannot reach the radiation focus through the slots in the source body mounting plate.
  • the user can achieve the focus dose adjustment function by changing the dose at the focus by turning on or off the cobalt source on each moving carrier.
  • all of the four carrier bodies can be turned on, or three of them can be turned on or even turned on to achieve dynamic adjustment of the dose at the focus.
  • the dynamic adjustment of the focus dose rate is achieved by a combination of the opening or closing of the cobalt source, such that the illumination of the tumor exhibits a different dose field.

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  • Health & Medical Sciences (AREA)
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  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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Abstract

一种可实现源体开启及关闭的拉杆装置及其放射装置，所述放射装置包括治疗头腔体、预准直器、准直器以及移动载源体。所述拉杆装置包括推拉电磁铁、移动杆、电磁铁固定板、钴源组固定板以及直线轴承。所述移动载源体通过直线轴承与钴源组固定板连接，且设置在预准直器的外侧。移动载源体与移动杆、推拉电磁铁依次连接，推拉电磁铁设置在电磁铁固定板上，且电磁铁固定板与钴源组固定板相连接。在实际使用过程中，推动电磁铁在通电或断电的情况下，推动移动杆带动移动载源体开启或关闭。采用该拉杆装置，能够解决焦点剂量率无法动态调节的问题。

Description

一种可实现源体运动的拉杆装置及其放射装置
技术领域
本发明涉及医疗器械领域， 尤其涉及一种伽玛刀设备中通过使源体开启或 关闭来实现放射剂量在一定范围内调强的拉杆装置及其放射装置。 背景技术
目前伽玛刀设备中， 包括用于产生放射线的钴源、 用于放置钴源的载源 体以及与载源体同心的准直器。 如图 1所示， 所述钴源在载源体的固定位置 分布， 所述准直器相对每颗钴源位置上包括多个准直器开口， 每个准直器的准 直开口的开口尺寸不同。在治疗过程中， 准直器与载源体同时绕焦点旋转。 在 切换准直器开口时， 通过准直器绕焦点相对载源体旋转一定角度来切换具有不 同开口尺寸的准直器， 来实现在焦平面上在固定开口尺寸下固定的射野尺寸及 焦点处在此开口下固定的焦点剂量率。
上述方式存在以下不足： 由于钴源位置是固定的， 准直器是一体绕焦点旋 转， 每个准直器开口相对载源体上钴源位置固定， 且只有通过准直器绕焦点旋 转来实现固定射野形状的改变， 无法实现焦平面上焦点剂量的调节功能。 发明内容
本发明提供一种可开启和关闭源体的拉杆装置及其放射装置， 用以实现焦 点剂量的调强功能。 本发明实施例提供了一种可实现源体运动的拉杆装置包括用于承载源体的 移动载源体， 所述移动载源体沿轴心线方向设置有通孔， 源体组安装板， 用于 放置移动载源体， 所述源体组安装板沿轴心线方向设置有开槽， 移动杆， 与移 动载源体相连接， 推拉电磁铁， 与移动杆相连接。 较优的， 当推拉电磁铁推动移动杆时， 移动杆带动移动载源体在源体组安 装板上运动， 使移动载源体上的通孔与源体组安装板上的开槽对齐或错开。 较优的， 还包括电磁铁固定板， 所述电磁铁固定板与源体组安装板固定连 接。 较优的， 所述电磁铁固定板设有开口， 用于固定推动电磁铁。 较优的， 还包括直线轴承， 所述移动载源体通过直线轴承固定在源体组固 定板上。 本发明实施例还提供了一种安装了可实现源体运动的拉杆装置的放射装 置， 包括至少一个预准直器， 所述拉杆装置设置在预准直器外侧， 所述预准直 器沿轴心线方向设有准直开口， 准直器， 所述准直器设置在预准直器内侧， 所 述准直器上设有至少两组开口尺寸不等的准直开口， 所述移动载源体、 预准直 器以及准直器的圆心重合于一点。 较优的， 还包括治疗头腔体， 所述预准直器安装在治疗头腔体上， 所述治 疗头腔体的圆心与预准直器、 准直器以及移动载源体的圆心重合。 较优的， 所述移动载源体在推拉电磁铁的推动下， 移动载源体上的通孔与 源体固定板上的开槽、 预准直器以及准直器上的准直开口对齐或错开。
采用本发明实施例的可实现源体开启或关闭的拉杆装置及其放射装置， 通 过源体的开启或者关闭的移动组合来实现焦点剂量的动态调节， 使肿瘤的照射 呈现不同的剂量场。
附图说明
图 1是现有伽玛刀中放射装置结构示意图；
图 2是本发明实施例提供的一种放射装置结构横切面示意图；
图 3是本发明实施例提供的一种放射装置的纵切面示意图。 具体实施方式
为了使本发明的目的、 技术方案及优点更加清楚明白， 以下结合附图及实 施例， 对本发明进行进一歩详细说明。 应当理解， 此处所描述的具体实施例仅 仅用以解释本发明， 并不用于限定本发明。
为了更好得理解本发明的技术方案， 申请人通过图 2的具体实施方式来说 明该发明实施例的放射装置。 如图 2所示， 该放射装置包括治疗头腔体、 预准 直器、 准直器以及移动载源体。 其中， 治疗头腔体横切面大致呈倒梯形结构， 预准直器横切面大致呈梯形结构，预准直器通过螺钉固定在治疗头腔体上。 而 准直器横切面呈一圆环， 且设置在预准直器及治疗头腔体内侧， 并通过轴承与 治疗头腔体相连接。 其中， 上述治疗头腔体、 预准直器以及准直器的圆心汇聚 于一点， 简称轴心或是放射焦点。 此外， 该放射装置还包括移动载源体， 所述 移动载源体通过螺钉、 销钉固定在预准直器的外侧。 在本发明实施例中， 所述 移动载源体上安装的源体为钴源， 且移动载源体沿轴心线方向的圆心与上述圆 心重合， 即放射焦点。
如图 3所示， 该放射装置中使钴源开启和关闭的拉杆装置， 除移动载源体 之外， 还包括源体组安装板、 推拉电磁铁、 移动杆、 电磁铁安装板以及直线轴 承。 所述源体组安装板纵切面呈倒置的 F型结构， 且固定在预准直器外侧， 所 述移动载源体通过直线轴承固定在源体组安装板上。所述移动载源体通过螺钉、 销钉与移动杆相连接。 此外， 移动杆与推拉电磁铁相连接， 且推动电磁铁安装 在电磁铁安装板上。 电磁铁安装板的纵切面呈矩形结构， 其上设有开口， 推动 电磁铁通过该开口固定在电磁铁安装板上。 此外， 该电磁铁安装板固定在源体 组安装板上。 在实际使用过程中， 推动电磁铁在通、 断电 （图中未显示） 带动 下， 推拉移动杆并带动移动载源体在源体组安装板上运动。
在本发明实施例中， 如图 2所示， 所述放射装置包括 4个移动载源体， 每 个移动载源体沿轴心线方向设置有一通孔， 且源体组安装板上沿轴心线方向也 设置了与移动载源体上通孔相配套的开槽。 4 个预准直器， 每个预准直器上沿 轴心方向设有一条准直开口， 而设置在预准直器内侧的准直器上则设有多组开 口尺寸不等的准直开口， 在发明实施例中， 如图 2所示， 设置了 4组开口尺寸 不同的准直开口。 在实际使用过程中， 治疗头腔体绕焦点旋转， 准直器同时切 换到同一组开口尺寸， 此时若推拉电磁铁在通电的情况下， 推拉移动杆并带动 移动载源体在源体组安装板上运动使移动载源体上的通孔与源体组安装板上的 开槽、 预准直器上的准直开口对齐， 我们称之为开源， 此时钴源发出的放射性 伽玛射线通过预准直器以及准直器上的准直开口而聚焦于轴心， 达到放射治疗 目的。 若推拉电磁铁在断电的情况下， 推拉移动杆并带动移动载源体在源体组 固定板上运动至移动载源体上的通孔与源体组安装板上的开槽完全错开， 我们 称之为闭源， 此时钴源发出的放射性伽玛射线无法通过源体组安装板上的开槽 到达放射焦点。事实上，使用者可以通过每个移动载源体上钴源的开启或关闭， 达到焦点处剂量的改变， 从而达到焦点剂量的调节功能。 例如， 在本发明实施 例中， 可以实现 4个载源体全部开启， 或者 3个开启甚至只开启一个， 来达到 焦点处剂量的动态调节。
在本发明实施例中， 通过钴源的开启或者关闭的移动组合来实现焦点剂量 率的动态调节， 使肿瘤的照射呈现不同的剂量场。
以上所述仅为本发明的较佳实施例而已， 并不用以限制本发明， 凡在本发 明的精神和原则之内所作的任何修改、 等同替换和改进等， 均应包含在本发明 的保护范围之内。

Claims

权 利 要 求 书
1、 一种可实现源体运动的拉杆装置， 其特征在于， 包括： 移动载源体， 用于承载源体， 所述移动载源体沿轴心线方向设置有通孔; 源体组安装板， 用于放置移动载源体， 所述源体组安装板沿轴心线方向 设置有开槽； 移动杆， 与移动载源体相连接； 推拉电磁铁， 与移动杆相连接。
2、如权利要求 1所述的可实现源体运动的拉杆装置， 其特征在于， 当推推拉电 磁铁推动移动杆时， 移动杆带动移动载源体在源体组安装板上运动， 使移动载 源体上的通孔与源体组安装板上的开槽对齐或错开。
3、 如权利要求 1所述的可实现源体运动的拉杆装置， 其特征在于， 还包括： 电 磁铁固定板， 所述电磁铁固定板与源体组安装板固定连接。
4、如权利要求 2所述的可实现源体运动的拉杆装置， 其特征在于， 所述电磁铁 固定板设有开口， 用于固定推拉电磁铁。
5、如权利要求 1所述的可实现源体运动的拉杆装置， 其特征在于， 还包括直线 轴承， 所述移动载源体通过直线轴承固定在源体组固定板上。
6、一种安装了如权利要求 1-5中任一权利要求中所述的可实现源体运动的拉杆 装置的放射装置， 其特征在于， 包括：
至少一个预准直器， 所述拉杆装置设置在预准直器外侧， 所述预准直器沿 轴心线方向设有准直开口；
准直器， 所述准直器设置在预准直器内侧， 所述准直器上设有至少两组开 口尺寸不等的准直开口； 所述移动载源体、 预准直器以及准直器的圆心重合于一点。
7、 如权利要求 6所述的放射装置， 其特征在于， 还包括： 治疗头腔体， 所述预 准直器安装在治疗头腔体上， 所述治疗头腔体的圆心与预准直器、 准直器以及 移动载源体的圆心重合。
8、如权利要求 6所述的放射装置， 其特征在于， 所述移动载源体在推拉电磁铁 的推动下， 移动载源体上的通孔与源体固定板上的开槽、 预准直器以及准直器 上的准直开口对齐或错开。
PCT/CN2013/071987 2013-02-28 2013-02-28 一种可实现源体运动的拉杆装置及其放射装置 WO2014131175A1 (zh)

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