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Radiology, Vol 128, 757-766, Copyright © 1978 by Radiological Society of North America

ARTICLES

The three dose components of negative pion beam and their role in pion radiotherapy

C Richman, JF Rodriguez Jr, JE Malcom and ML Stein

A new method has been developed for analyzing therapeutic negative pion beams into three LET (linear energy transfer) dose components inherent in such a beam. The technique utilizes thin silicon detectors to obtain pulse height spectra produced by the various particles in the beam traversing the detectors. It is shown that a low LET group is correlated with the incoming pions, muons and electrons; a medium LET group corresponds to protons, deuterons, tritons, and high energy alpha particles; and a high LET group is due to low energy alpha particles, 3He and recoil particles. Several beams used clinically have been studied.




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