SIGNAL PROCESSOR AND RADIATION DETECTION DEVICE

摘要

According to an embodiment, a signal processor includes an integrator, a differentiator, a zero cross detector, a pile-up detector, an event interval detector, a counter, and a creator. The integrator is configured to calculate charge of current from a photoelectric converter for an incident radiation. The differentiator is configured to calculate a differential value of the current. The zero cross detector is configured to detect a zero cross of the differential value. The pile-up detector is configured to detect pile-up of the current based on the zero cross. The event interval detector is configured to detect, based on the zero cross and pile-up, an event interval of the radiation entering. The counter is configured to count, based on the charge and pile-up, the respective numbers of events according to the charge and the event interval. The creator is configured to create histograms for the numbers of events.

主权项

1. A signal processor comprising:
an integrator configured to calculate charge by integrating current from a photoelectric converter that converts to the current based on an incident radiation; a differentiator configured to calculate a differential value by differentiating the current; a zero cross detector configured to detect a zero cross of the differential value; a pile-up detector configured to detect pile-up relative to the current based on the zero cross; an event interval detector configured to detect, based on the zero cross and the pile-up, an event interval that is a time period between events in which the radiation enters the photoelectric converter; a counter configured to count, based on the charge and the pile-up, number of events according to the charge, and number of events according to the event interval; and a creator configured to create a histogram for the number of events relative to the charge, and a histogram of the number of events relative to the event interval.