Lead shielding thickness for dose reduction of 5 MeV electrons.
作者信息
Prasad S G, Parthasaradhi K, Lee Y, Garces R
机构信息
Division of Medical Physics, Evanston Hospital, Northwestern University Medical School, Illinois 60201.
出版信息
Med Phys. 1989 Sep-Oct;16(5):807-8. doi: 10.1118/1.596432.
DOI:10.1118/1.596432
PMID:2509872
Abstract
The relative percent intensity reduction by lead (Pb) of 5 MeV electrons produced by Siemens Mevatron 77/74 for 5 cm diameter, 10 X 10, 15 X 15, and 20 X 20 cm2 cones both with and without buildup is measured. The thickness of lead (Pb) required to attenuate the intensity of the primary electron beam to 95% and 98% depends upon the cone size and upon the depth in phantom at which transmission measurements are made.
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