A plurality of CT imaging conditions are created beforehand as presets, each preset is created beforehand as an icon, and each preset is associated with an icon and registered. Each icon is disposed in a CT imaging condition setting screen according to a spatial resolution and density resolution that serve as two-dimensional indexes relating to image quality. The selection of a given icon by a user results in the selection of the CT imaging conditions corresponding to the selected icon. The indexes relate to image quality and are two-dimensional, and this facilitates operation and makes it possible to intuitively select optimal CT imaging conditions with a small number of steps.
