At the time and the like of offset calibration the plural times the reading result of the dark reading which is done the transmission possible radiation picture detector and the radiation picture formation system which uses that are offered at frequency of little transmission. Radiation picture detector 1, the plural radiation detection elements (x, y) the sensor panel section the plural radiation detection elements (x, y) from the dark reading value D k which is output (x, y) the memory expedient 7 which is remembered and, the plural times to do dark reading beforehand when 4 which is arranged in 2 dimensional condition and radiation is not irradiated, the radiation detection element (x, y) from dark reading value D of the plural batches which are output k (x, y) of on the basis in every dark reading of each time the radiation detection element (x, every y) the respective offset revisionValue O (x, y) the calculation expedient 6 which is calculated and the radiation detection element (x, every y) offset correction value O (x, y) the means of communication 3 which are transmitted to the external device and 13 and, it has with the battery which is built in.オフセットキャリブレーション時等に複数回行われるダーク読取の読み取り結果を少ない送信回数で送信可能な放射線画像検出器およびそれを用いた放射線画像生成システムを提供する。放射線画像検出器1は、複数の放射線検出素子(x,y)が2次元状に配置されたセンサパネル部4と、放射線を照射しない状態で複数の放射線検出素子(x,y)から出力されるダーク読取値Dk(x,y)を記憶する記憶手段7と、予めダーク読取を複数回行い、各回のダーク読取ごとに放射線検出素子(x,y)から出力された複数回分のダーク読取値Dk(x,y)に基づいて放射線検出素子(x,y)ごとにそれぞれオフセット補正値O(x,y)を算出する算出手段6と、放射線検出素子(x,y)ごとのオフセット補正値O(x,y)を外部装置に送信する通信手段3、13と、内蔵されたバッテリとを備える。
