Validation of a new virtual wedge model

被引：24

作者：

Desobry, GE ^{[1
]}

Waldron, TJ ^{[1
]}

Das, IJ ^{[1
]}

机构：

[1] Fox Chase Canc Ctr, Philadelphia, PA 19111 USA

来源：

MEDICAL PHYSICS | 1998年 / 25卷 / 01期

关键词：

dynamic wedge; virtual wedge;

D O I：

10.1118/1.598172

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：

Results of a validation study of a commercial virtual wedge device recently installed at our institution are presented. The wedge simulation produces an energy fluence from the treatment head that is equivalent to the primary energy fluence attenuated through a wedge-shaped slab of water with the central axis fluence set to unity. A simple exponential formula used to compute off-axis wedge factors is compared to beam profiles measured in a water phantom. A fast Fourier transform (FFT) convolution dose calculation is compared to measured dose profiles. Measured and calculated central axis wedged/open field ratios as a function of depth are also compared. (C) 1998 American Association of Physicists in Medicine.

引用

页码：71 / 72

页数：2