Phantom, calibration apparatus, calibration method, and calibration program

Abstract

A phantom is provided for acquiring calibration data of a detector that outputs an electric signal corresponding to a photon energy of incident radiation. The phantom includes a first base substance and at least one second base substance having an attenuation coefficient higher than an attenuation coefficient of the first base substance. The first base substance has a thickness that changes in a direction orthogonal to an irradiation field of radiation during imaging. The second base substance is embedded in the first base substance, and the size and the position of the second base substance change in a direction orthogonal to an irradiation field of the radiation during the imaging.

Dependencies are inferred from the claim text.