Multileaf collimator assembly with reduced extra-focal leakage

A technology of multi-leaf collimator and components, which can be used in treatment, radiation therapy, X-ray/γ-ray/particle irradiation therapy, etc., and can solve the problem of high risk of secondary cancer

Active Publication Date: 2017-03-29
VARIAN MEDICAL SYSTEMS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Out-of-focus leaks may result in considerable dose to surrounding criti

Method used

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  • Multileaf collimator assembly with reduced extra-focal leakage
  • Multileaf collimator assembly with reduced extra-focal leakage
  • Multileaf collimator assembly with reduced extra-focal leakage

Examples

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Embodiment Construction

[0028] Various embodiments of a multi-leaf collimator assembly and radiation machine are described. It should be understood that the present disclosure is not limited to the specific embodiments described, as these specific embodiments can of course be changed. Aspects described in conjunction with a particular embodiment are not necessarily limited to this embodiment, and may be practiced in any other embodiments.

[0029] All technical and scientific terms used herein have meanings generally understood by those of ordinary skill in the art, unless specifically defined otherwise. As used in the specification and appended claims, the singular forms "a", "an" and "the" include plural references unless the context clearly dictates otherwise. The term "or" refers to a non-exclusive "or" unless the context clearly dictates otherwise. In the following description, well-known components or steps may not be described in detail in order to avoid unnecessarily obscuring the embodiments ...

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Abstract

A multileaf collimator assembly employs one or more static blocks to significantly reduce extra focal leakage or out of field dose. The multileaf collimator assembly includes a plurality of pairs of beam shaping leaves. The leaves of each pair are movable relative to each other in a longitudinal direction. The one or more static blocks are disposed adjacent to the outermost pair of beam shaping leaves and unmovable in the longitudinal direction. The material composition and geometric characteristics of the static blocks may be chosen based on the pre-determined leakage specification for a particular radiation apparatus in the patient plane.

Description

Technical field [0001] Embodiments of the present disclosure generally relate to radiation devices and methods. In particular, various embodiments of the multi-leaf collimator assembly capable of significantly reducing the leakage of out-of-focus radiation near the expected radiation treatment area are described. Background technique [0002] Multi-leaf collimator (MLC) is widely used in radiology machines to support various radiotherapy treatments. The multi-leaf collimator includes multiple beam shaping blades that can independently move in or out of the radiation beam to block or modify the beam. The beam shaping blades are usually arranged in pairs and arranged on opposite banks. The combined positioning of all blades can define one or more apertures through which the uninterrupted radiation beam passes. One or more holes may define a treatment field in an isocentric plane, the size and / or shape of which is generally consistent with the size and / or shape of a target locate...

Claims

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Application Information

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IPC IPC(8): A61N5/10
CPCA61N5/1001A61N5/1028A61N5/1045A61N2005/1019A61N2005/1094G21K1/046
Inventor M·康斯坦丁许欣璐J·埃文斯R·科佩尔斯
Owner VARIAN MEDICAL SYSTEMS
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