Apparatus and method for acquiring wave frequency distribution, method for acquiring wave frequency distribution acquisition and radiation imaging device

摘要

To create a high-accuracy wave height frequency distribution in a short time and, furthermore, to reduce the cost of a radiation imaging device for which a detector using the wave height frequency distribution to calibrate is adapted.SOLUTION: Provided is a wave height frequency distribution acquisition device of a radiation detector equipped with a plurality of counting units which, when the value of a detection signal of an incident X-ray that is detected is greater than or equal to a threshold, counts the detection signals and outputs respective count values. The wave height frequency distribution acquisition device comprises: a threshold setting unit for setting a first threshold V1 to a first counting unit and setting a second threshold V2 higher than the first threshold V1 to a second counting unit, and resetting a first threshold V1' different from the first threshold V1 to the first counting unit; a measurement control unit for carrying out a plurality of measurements; and a wave height frequency distribution generation unit for generating a wave height frequency distribution for the first threshold in the first counting unit on the basis of a difference between the count values obtained by the first and second counting units through a plurality of measurements carried out in accordance with the measurement control unit.SELECTED DRAWING: Figure 8