Apparatus and method for focusing a radiotherapy field, where slidable plates on the collimator ring controls the collimator

A radiation therapy and collimator technology, applied in radiation therapy, using aperture/collimator, X-ray/γ-ray/particle irradiation therapy, etc., to achieve good working reliability, reliable rigid limit position, and easy construction Effect

Inactive Publication Date: 2005-09-07
ELEKTA AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is also very limited in the possibility to choose different spatial dose distributions around the focal point
Also, accessibility issues are yet to be addressed
Another example is a holistic radiotherapy device as disclosed in EP1057499, which also has significant limitations regarding variations in spatial dose distribution

Method used

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  • Apparatus and method for focusing a radiotherapy field, where slidable plates on the collimator ring controls the collimator
  • Apparatus and method for focusing a radiotherapy field, where slidable plates on the collimator ring controls the collimator
  • Apparatus and method for focusing a radiotherapy field, where slidable plates on the collimator ring controls the collimator

Examples

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Embodiment Construction

[0047] figure 1 is a perspective view of an assembly comprising a source carrier arrangement 2 surrounding a collimator body 4 according to one embodiment of the invention. Both the source-carrier arrangement 2 and the collimator body 4 have the shape of a frusto-cone. The source carrier arrangement 2 comprises six sections 6 distributed along the annular circumference of the collimator body 4 . Each part 6 has a plurality of holes 8 in which are placed containers containing a radioactive source such as cobalt. The collimator body 4 is provided with a collimator channel or duct, the inner opening of which is shown in this figure.

[0048] Each portion 6 has two straight sides 12 and two curved sides 14a, 14b. One of the curved sides 14a forms a longer arc and is located near the base of the cone, while the other curved side 14b forms a shorter arc. The parts 6 are linearly displaceable, ie they do not rotate around the collimator body 4, but move back and forth along an im...

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PUM

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Abstract

A radiation therapy device and a method of changing the spatial dose distribution surrounding a focus are disclosed. At least a subset of the radioactive sources in a source carrier is linearly displaceable relatively to at least a subset of collimator passage inlets, or vice versa.

Description

technical field [0001] The present invention relates to radiotherapy apparatus comprising a source carrier arrangement carrying radiation sources and a collimator body for directing radiation emitted from the sources towards a substantially common focal point. The invention also relates to a method of altering the spatial dose distribution around the focal point. Background technique [0002] The development of surgical technology has made great strides over the years. For example, patients requiring brain surgery can now enjoy non-invasive procedures with little trauma to the patient. [0003] The Leksell Gamma Knife(R) provides such surgery by means of gamma radiation. Radiation is emitted from a stationary source and focused by means of a collimator, which is a channel or conduit to a defined target for obtaining a beam of limited cross-section. Each radiation source delivers only a very small dose to the tissue, and the useful maximum radiation dose is obtained only a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N5/10G21K1/04
CPCG21K1/04A61N5/1084
Inventor 佩尔·卡尔松耶特·汉纳伊瓦尔斯·阿尔克斯尼斯安德斯·尼尔松彼得·弗勒贝里
Owner ELEKTA AB
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