MEASUREMENT OF THE SOURCE SIZE OF A 6-MV AND 18-MV RADIOTHERAPY LINAC

被引：32

作者：

LOEWENTHAL, E

LOEWINGER, E

BARAVRAHAM, E

BARNEA, G

机构：

来源：

MEDICAL PHYSICS | 1992年 / 19卷 / 03期

关键词：

D O I：

10.1118/1.596812

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：

The quality of portal imaging is strongly affected by the source size of the radiotherapy machine. The effective source size of the dual-energy clinac 1800 (6 and 18 MV) was measured with a 50-mu-m wide and 120 mm long slit formed by two tungsten-copper alloy blocks. A series of slit images were obtained by translating the slit horizontally. The images were analyzed using a microdensitometer. The measured data was simulated using an analytical model of the source and its size was derived by a best-fit analysis. For both energies the FWHM was found to be 1.5+/-0.1 mm.

引用

页码：687 / 690

页数：4

共 4 条

[1] EVALUATION OF A BEAM-SPOT CAMERA FOR MEGAVOLTAGE X-RAYS [J].