GENERATION OF ARBITRARY INTENSITY PROFILES BY DYNAMIC JAWS OR MULTILEAF COLLIMATORS

被引：281

作者：

SPIROU, SV

CHUI, CS

机构：

[1] Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, New York, 10021

来源：

MEDICAL PHYSICS | 1994年 / 21卷 / 07期

关键词：

DYNAMIC COLLIMATION; INTENSITY MODULATION; INDEPENDENT JAWS; MULTILEAF COLLIMATORS;

D O I：

10.1118/1.597345

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

An algorithm, which calculates the motions of the collimator jaws required to generate a given arbitrary intensity profile, is presented. The intensity profile is assumed to be piecewise linear, i.e., to consist of segments of straight lines. The jaws move unidirectionally and continuously with variable speed during radiation delivery. During each segment, at least one of the jaws is set to move at the maximum permissible speed. The algorithm is equally applicable for multileaf collimators (MLC), where the transmission through the collimator leaves is taken into account. Examples are presented for different intensity profiles with varying degrees of complexity. Typically, the calculation takes less than 10 ms on a VAX 8550 computer.

引用

页码：1031 / 1041

页数：11

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