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Radiology, Vol 126, 489-491, Copyright © 1978 by Radiological Society of North America

ARTICLES

Dose distribution around an 125I seed source in tissue

V Krishnaswamy

Dose distribution about an 125I source in tissue has been calculated using absorbed dose constant and point isotropic source buildup factors. The effect of encapsulation material has been included. Depth- dose values have been verified by measurements with thermoluminescent dosimeters. Present data gives a value for absorbed dose constant of 1.32 rads cm2/mCi-hr. compared to the presently used value of 1.7. Depth-dose values are compared with other published data.


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