An image diagnostic apparatus includes an examination information acquisition unit and an imaging unit. The examination information acquisition unit searches a medical image server based on patient information to acquire past examination information corresponding to the patient information automatically from the medical image server. The imaging unit performs imaging according to an imaging condition set by referring to the examination information. Alternatively, an image diagnostic apparatus includes an imaging condition setting unit and an imaging unit. The imaging condition setting unit automatically sets or indicates an imaging condition closest to information designating an imaging condition included in examination order information directed to an image diagnostic apparatus made by another maker or a different type of an image diagnostic apparatus made by a same maker. The imaging unit performs imaging according to the set or indicated imaging condition.
