Data processing device, data processing method, and data processing program

A data processing method executed by a computer, comprising:

• acquiring projection data that is obtained by detecting radiation emitted from a radiation source and transmitted through a subject via a photon-counting detector consisting of a plurality of detection elements and that corresponds to the number of photons of the radiation in each of a plurality of energy bins of the radiation;
• deriving first correction data for correcting projection data of at least one target energy bin that is a correction target among the plurality of energy bins based on the projection data in each of the plurality of energy bins;
• and
• deriving first corrected projection data by correcting, in the projection data of the target energy bin, a projection value that is equal to or less than a first threshold value in the first correction data using the first correction data.

A non-transitory computer-readable storage medium that stores a data processing program causing a computer to execute a procedure comprising:

• acquiring projection data that is obtained by detecting radiation emitted from a radiation source and transmitted through a subject via a photon-counting detector consisting of a plurality of detection elements and that corresponds to the number of photons of the radiation in each of a plurality of energy bins of the radiation;
• deriving first correction data for correcting projection data of at least one target energy bin that is a correction target among the plurality of energy bins based on the projection data in each of the plurality of energy bins;
• and
• deriving first corrected projection data by correcting, in the projection data of the target energy bin, a projection value that is equal to or less than a first threshold value in the first correction data using the first correction data.