Abstract: An apparatus, method and system for measurement of radiation during or directly following hadron therapy treatment for dose and range verification purposes accomplished through measurement of prompt gamma and other beam-induced radiation. One example includes the measurement of secondary prompt gamma radiation during proton and carbon ion beam irradiation. The measurement can also be made of other beam-induced radiation results. The measurement of gamma radiation or other beam-induced radiation allows for optimization of radiation dose disposition to the target tissue, with improved sparing of surrounding critical structures and normal tissue. Adjustments to a radiation treatment may be made as needed based on actual and measured applied dosages.