Patent ID: 9268036
Filing Date: 2016-02-23
CPC Classification: G01T

Claim Text:
1. A radiation detector comprising: a radiation detection portion for detecting radiations and producing an output signal; a first differential filter portion having a time constant and operative to differentiate the output signal from the radiation detection portion for converting the signal into a first pulsed signal; a second differential filter portion having a time constant shorter than the time constant of the first differential filter portion and operative to differentiate the output signal from the radiation detection portion for converting the signal into a second pulsed signal; a third differential filter portion having a time constant longer than the time constant of the second differential filter portion and shorter than the time constant of the first differential filter portion and operative to differentiate the output signal from the radiation detection portion for converting the signal into a third pulsed signal; an event detection portion for outputting an event signal in response to the second and third pulsed signals; a pileup detection portion for outputting a pileup signal in response to a ratio between a pulse height of the second pulsed signal and a pulse height of the third pulsed signal; and a pulse height detection portion operative to start detection of the pulse height of the first pulsed signal in response to the event signal and to output a detection signal containing information about the pulse height of the first pulsed signal, wherein said pulse height detection portion stops from outputting the detection signal in response to the pileup signal.