AN ELECTRON-DENSITY CALIBRATION PHANTOM FOR CT-BASED TREATMENT PLANNING COMPUTERS

被引：143

作者：

CONSTANTINOU, C ^{[1
]}

HARRINGTON, JC ^{[1
]}

DEWERD, LA ^{[1
]}

机构：

[1] RADIAT MEASUREMENTS INC,MIDDLETON,WI 53562

来源：

MEDICAL PHYSICS | 1992年 / 19卷 / 02期

关键词：

TREATMENT PLANNING; ELECTRON DENSITY; COMPUTERIZED TOMOGRAPHY; QUALITY ASSURANCE; PHANTOM;

D O I：

10.1118/1.596862

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：

In order to correct for tissue heterogeneities on a voxel-by-voxel basis during CT-based treatment planning, the relationship between the correction factor (CF) and the CT number in Hounsfield units (HU) for the scanner in use must be established. Since the relationship between CF and electron density (rho(e)) of various materials is well documented, the rho(e) vs HU is required for direct computation of the correction factors by treatment planning computers. A CT phantom with 18 different tissue substitutes has been used to establish the rho(e) vs HU relationship. A description of the phantom and its contents is given and the calibration of the CT function of the planning computer is discussed.

引用

页码：325 / 327

页数：3

共 16 条

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