| 摘要 |
FIELD: physics.SUBSTANCE: apparatus includes a local minimum identifier (408) which identifies a local minimum between overlapping pulses in a signal, wherein the pulses have amplitudes which are indicative of the energy of successively detected photons from a multi-energy radiation beam by a radiation sensitive detector, and a pulse pile-up error corrector (232) which corrects, based on the local minimum, a pulse pile-up energy-discrimination error when energy-discrimination of the pulses is carried out using at least two thresholds corresponding to different energy levels.EFFECT: reduced spectral error when calculating photons at high count rate.29 cl, 8 dwg |
