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Multi level multileaf collimators

A technology of multi-leaf collimator and blocking leaves, which is applied in the field of radiation devices and can solve problems such as MLC construction and operation problems

Active Publication Date: 2013-05-01
VARIAN MEDICAL SYSTEMS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, reducing the width of the leaves to increase the resolution of the MLC has limitations and poses difficulties for MLC construction and operation

Method used

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  • Multi level multileaf collimators
  • Multi level multileaf collimators
  • Multi level multileaf collimators

Examples

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Embodiment Construction

[0023] Various embodiments of multistage MLCs are described. It is to be understood that this invention is not limited to particular embodiments described herein, as such may, of course, vary. Aspects described in connection with a particular embodiment are not necessarily limited to that embodiment and can be implemented in any other embodiment. For example, although various embodiments have been described in connection with an X-ray radiation therapy machine, it should be understood that the invention can also be implemented in other electromagnetic devices and modalities. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting, since the scope of the invention will be defined by the appended claims, along with the full scope of equivalents to which such claims are entitled. In addition, various embodiments are described with reference to the drawings. It should be noted t...

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Abstract

A multilevel MLC includes a first set and a second set of a plurality of pairs of beam blocking leaves arranged adjacent one another. Leaves of each pair in the first set are disposed in an opposed relationship and longitudinally movable relative to each other in a first direction. Leaves of each pair in the second set are disposed in an opposed relationship and longitudinally movable relative to each other in a second direction generally parallel to the first direction. The first and second sets of pairs of leaves are disposed in different planes.

Description

technical field [0001] The present invention relates generally to radiation apparatus and methods, and more particularly to multi-leaf collimators and methods for conditioning radiation beams useful in radiation therapy and other industries. Background technique [0002] Multi-leaf collimators (MLCs) are widely used in radiation therapy machines to support various treatments including intensity modulated radiation therapy (IMRT) and arc therapy. A conventional multi-leaf collimator comprises a single stage of multiple beam blocking leaves arranged in two opposing rows or arrays. Each leaf in one row is movable longitudinally relative to the leaves in the opposite row. In operation, each of the individual lobes is positioned to block the portion of the radiation beam that passes through the volume occupied by the lobes. The combined positioning of all lobes defines one or more apertures through which the unblocked radiation beam passes and the aperture defines the shape of ...

Claims

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Application Information

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IPC IPC(8): A61N5/10G21K1/02G21K1/04A61B6/10
CPCG21K1/046A61N5/1045
Inventor S·普林斯S·曼斯菲尔德
Owner VARIAN MEDICAL SYSTEMS
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