Patent ID: 8379796

Claim:
A radiation imaging apparatus comprising: an imaging unit adapted to capture a radiation image of an object; a discrimination unit adapted to discriminate whether an imaging mode of the radiation image captured by said imaging unit is a mode of storing the radiation image in a storage unit or a mode of not storing the radiation image in the storage unit; a first calculation unit adapted to calculate image size information indicating a size of the radiation image; a second calculation unit adapted to calculate image display region information indicating a size of an image display region in which the radiation image is configured to be displayed by a display unit; a first decision unit adapted to decide a rotation condition for rotation of the radiation image when the radiation image captured by said imaging unit is displayed on the display unit; and a second decision unit adapted to decide an enlargement/reduction condition for display of the radiation image upon enlargement or reduction thereof when the radiation image captured by said imaging unit is displayed on the display unit, wherein if said discrimination unit discriminates at the start of radiation irradiation by said imaging unit that the imaging mode of the radiation image captured by said imaging unit is the mode of not storing the radiation image, said second decision unit decides the enlargement/reduction condition from the image size information and the image display region information such that the overall radiation image rotated under a rotation condition decided by said first decision unit is displayed at a maximum ratio with respect to the image display region.