The Three Dose Components of a Negative Pion Beam and Their Role in Pion Radiotherapy

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Abstract
A new method was developed for analyzing therapeutic negative pion beams into 3 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. 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 were studied.

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