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Coded-Mask Gamma Camera for Range Verification in Proton Therapy

A coded-mask (coded-aperture) gamma camera, using a structured tungsten collimator and scintillator detector, images the prompt gamma rays emitted along a proton beam path to locate the distal dose falloff in real time. Students learn how the first clinical-condition test achieved 1.7 mm precision on the falloff position for 10^8 protons, matching Monte Carlo predictions, and why this offers a competitive alternative to single- and multi-slit range-verification systems.

Dr. Theopolis Text

First experimental test of a coded-mask gamma camera for proton therapy monitoring

Objective. The objective of the presented study was to evaluate the feasibility of a coded-mask (CM) gamma camera for real-time range verification in proton therapy, addressing the need for a precise…