Build‐up region of megavoltage photon radiation sources
作者:
D. E. Velkley,
D. J. Manson,
J. A. Purdy,
G. D. Oliver,
期刊:
Medical Physics
(WILEY Available online 1998)
卷期:
Volume 2,
issue 1
页码: 14-19
ISSN:0094-2405
年代: 1998
DOI:10.1118/1.594158
出版商: American Association of Physicists in Medicine
数据来源: WILEY
摘要:
Measurements of surface dose and build‐up have been measured for photon radiation sources with maximum energy from 1.2 to 25 MeV. A variable volume ionization chamber was used and the results extrapolated to what would be obtained with a zero volume chamber. The results are found to depend systematically on the plate separation of a parallel plate ionization chamber and an empirical method was derived for correcting measurements made with a fixed volume chamber. The relationship of dose build‐up curves with skin reactions in radiation therapy patients is discussed.
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