Patent ID: 7696484

Claim:
An electronic cassette type of radiation detection apparatus comprising: a sensor array including a plurality of sensors for detecting incident radiation; and a connecting portion for connecting said radiation detection apparatus to one or more detachable additional function modules arranged at a side of the sensor array, wherein, without connection with the detachable one or more additional function module(s), said radiation detection apparatus is capable only of operating in a still image radiographing mode, wherein a selection unit is provided for changing the radiographing mode from the still image radiographing mode or a moving image radiographing mode into a selectable state in response to connection of the electronic cassette type of radiation detection apparatus to the one or more additional function modules, wherein the one or more additional function modules include a light source for irradiating the plurality of sensors with light for an optical reset, and the light source is included in the additional function modules arranged at the side of the sensor array, and wherein the radiation detection apparatus further comprises a light guide plate arranged on a side opposite to a radiation-incident side of the sensor array.