Patent ID: 7629587

Claim:
A radiation imaging apparatus comprising: a flat panel detector for deriving a radiation image based on incident radiation; a holding unit which holds the flat panel detector; and a connecting mechanism capable of performing a connecting and a disconnecting between the holding unit and the flat panel detector, wherein the connecting mechanism includes a mechanical connection unit which mechanically connects the flat panel detector to the holding unit and a heat transmitting unit which transmits heat between the flat panel detector and the holding unit, and wherein the flat panel detector includes a heat radiator for radiating heat generated in the flat panel detector and the holding unit includes a cooling mechanism, when the flat panel detector is held by the holding unit, the heat is cooled by the cooling mechanism through the heat radiator and the heat transmitting unit, and when the flat panel detector is disengaged from the holding unit, the heat in the flat panel detector is radiated by the heat radiator.