Radiography system, image processing apparatus, radiography apparatus, image processing method, and image processing program

A radiography system comprising:

• a radiography apparatus comprising a first radiation detector that includes a plurality of pixels accumulating charge corresponding to emitted radiation and a second radiation detector that is provided so as to be stacked on a side of the first radiation detector from which the radiation is transmitted and emitted and includes a plurality of pixels accumulating charge corresponding to the emitted radiation;
• a control unit that performs first control including control for reading charge from a plurality of pixels of the first radiation detector and control for reading charge from a plurality of pixels of the second radiation detector and performing a first correction process for generating a diagnosis image for image data obtained by the read charge that is read from the second radiation detector in a case in which the diagnosis image is generated and performs second control including control for reading charge from the plurality of pixels of the first radiation detector and control for reading charge from the plurality of pixels of the second radiation detector and performing a second correction process for deriving a quantitative value for image data obtained by the read charge that is read from the second radiation detector in a case in which the quantitative value is derived;
• a generation unit that generates the diagnosis image, using a first radiographic image and a second radiographic image obtained by the first control;
• and
• a derivation unit that derives at least one of bone mineral content or bone density, using a first radiographic image and a second radiographic image obtained by the second control.

An image processing method comprising:

• allowing an acquisition unit to acquire a first radiographic image and a second radiographic image from a radiography apparatus comprising a first radiation detector that includes a plurality of pixels accumulating charge corresponding to emitted radiation and a second radiation detector that is provided so as to be stacked on a side of the first radiation detector from which the radiation is transmitted and emitted and includes a plurality of pixels accumulating charge corresponding to the emitted radiation;
• allowing a generation unit to perform a first correction process for generating a diagnosis image for the second radiographic image captured by the second radiation detector and to generate the diagnosis image, using the second radiographic image subjected to the first correction process and the first radiographic image captured by the first radiation detector;
• and
• allowing a derivation unit to perform a second correction process for deriving a quantitative value for the second radiographic image captured by the second radiation detector and to derive at least one of bone mineral content or bone density, using the second radiographic image subjected to the second correction process and the first radiographic image captured by the first radiation detector.

A non-transitory computer readable medium storing a program that causes a computer to execute a process, the process comprising:

• acquiring a first radiographic image and a second radiographic image from a radiography apparatus comprising a first radiation detector that includes a plurality of pixels accumulating charge corresponding to emitted radiation and a second radiation detector that is provided so as to be stacked on a side of the first radiation detector from which the radiation is transmitted and emitted and includes a plurality of pixels accumulating charge corresponding to the emitted radiation;
• performing a first correction process for generating a diagnosis image for the second radiographic image captured by the second radiation detector and generating the diagnosis image, using the second radiographic image subjected to the first correction process and the first radiographic image captured by the first radiation detector;
• and
• performing a second correction process for deriving a quantitative value for the second radiographic image captured by the second radiation detector and deriving at least one of bone mineral content or bone density, using the second radiographic image subjected to the second correction process and the first radiographic image captured by the first radiation detector.