Imaging apparatus and imaging system

A method for controlling an image radiographing apparatus comprising:

• an area sensor;
• radiographing mode setting means for setting one radiographing mode from among a plurality of radiographing modes that are preset;
• and
• correction means for performing an arithmetic operation processing using a radiographed output and an offset output from said area sensor, said method comprising:
• a step of controlling said area sensor and the arithmetic operation processing by said correction means in accordance with a signal from said radiographing mode setting means,
• wherein at least one of said plurality of radiographing modes is an energy subtraction radiographing mode in which the radiographed output of at least two frames acquired by different X- ray energies and the offset output of at least one frame are acquired.

A computer readable medium encoded with a computer program for controlling an image radiographing apparatus, the image radiographing apparatus comprising:

• an area sensor;
• radiographing mode setting means for setting one radiographing mode from among a plurality of radiographing modes that are preset;
• and
• correction means for performing an arithmetic operation processing using a radiographed output and an offset output from said area sensor;
• wherein said program directs the computer to control said area sensor and the arithmetic operation processing by said correction means in accordance with a signal from said radiographing mode setting means, and
• wherein at least one of said plurality of radiographing modes is an energy subtraction radiographing mode in which the radiographed output of at least two frames acquired by different X- ray energies and the offset output of at least one frame are acquired.