RADIATION MEASUREMENT APPARATUS AND RADIATION MEASUREMENT METHOD

摘要

A radiation measurement apparatus includes an array-type radiation detector and an information calculation unit which obtains information on energies detected by pixels of the detector and information on a pixel on which a radiation ray is incident. The information calculation unit includes an energy conversion unit which converts a detected signal of a pixel which is equal to or larger than a predetermined threshold value into a detected energy value, a judgment value calculation unit which obtains a judgment value used to judge whether Compton scattering has been generated in the pixel in accordance with the detected energy, a judgment unit which judges whether the Compton scattering has been generated in the pixel in accordance with the judgment value, and a determination unit which obtains information on a pixel on which a radiation ray is first incident in accordance with a result of the judgment performed by the judgment unit.

主权项

1. A radiation measurement apparatus including an array-type radiation detector having a plurality of pixels and an information calculation unit which obtains information on detected energies of the individual pixels from the radiation detector and information on a pixel on which a radiation ray is incident, wherein
the information calculation unit includes
an energy conversion unit configured to convert a detected signal of a pixel which is equal to or larger than a predetermined threshold value into a detected energy,a judgment value calculation unit configured to obtain a Compton scattering judgment value used to judge whether Compton scattering has been generated in the pixel in accordance with the detected energy,a scattering judgment unit configured to judge whether the Compton scattering has been generated in the pixel in accordance with the Compton scattering judgment value, andan incident pixel determination unit configured to obtain information on a pixel on which a radiation ray is first incident in accordance with a result of the judgment performed by the scattering judgment unit.