TOTAL PERTURBATION CORRECTION FACTOR FOR PTW AND NACP PLANE PARALLEL CHAMBERS IN ELECTRON-BEAMS

被引：11

作者：

CINOS, C

LIZUAIN, MC

FEBRIAN, MI

机构：

[1] Servicio de Fisica y Protección Radiológica, Hospital de Bellvitge Principes de España, L'Hospitalet de Ll., Barcelona

来源：

RADIOTHERAPY AND ONCOLOGY | 1991年 / 21卷 / 02期

关键词：

PERTURBATION CORRECTION FACTOR; PU; PP; PLANE PARALLEL CHAMBERS; ELECTRON BEAM; RECOMBINATION FACTOR;

D O I：

10.1016/0167-8140(91)90086-V

中图分类号：

R73 [肿瘤学];

学科分类号：

100214 ;

摘要：

The international protocols of electron dosimetry published by the Nordic Association of Clinical Physics and the Sociedad Espanola de Fisica Medica recommend the use of a total perturbation correction factor p(u, pp) which is constant for all plane parallel chambers. In this work we have compared the dose measured with the PTW-Markus and NACP plane parallel chambers in respect to a cylindrical one. The obtained results indicate that for the ionization chamber NACP the value of p(u, pp) = 1.000 +/- 0.005 is adequate while for the ionization chamber PTW the observed difference is explained by considering an individual total perturbation correction factor variable with the mean energy at depth z, E(z)BAR, as the fluence perturbation correction factor p(f) is usually given for cylindrical chambers.

引用

页码：135 / 140

页数：6

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