The gamma camera (8,180) one radiation detector head (10,12,210,212) it possesses at least. The plural capacitive elements where one this kind of radiation detector head (10,12,210,212), the radiation detector head the radiation inspection section (50) is arranged at least at least on (60,260,76,276) it possesses. The proximity sensor monitor (62), the plural capacitive elements it is connected, it detects the nearness of the radiation detector head and the object on the basis of the electric quality where the capacitive element was measured. The collision sensor monitor (64), the plural capacitive elements it is connected, phase the parallel electric conduction board which is distant (66,67) the conductivity electric current which flows, responding to the mechanical deformation of interval between the electric conduction boards, it detects between.ガンマカメラ(8,180)は少なくとも1つの放射線検出器ヘッド(10,12,210,212)を有する。少なくとも1つのこのような放射線検出器ヘッド(10,12,210,212)は、放射線検出器ヘッドの少なくとも放射線検知部(50)上に配置される複数の容量性要素(60,260,76,276)を有する。近接センサモニタ(62)は、複数の容量性要素と結合され、容量性要素の測定された電気特性に基づいて放射線検出器ヘッドと対象との近さを検出する。衝突センサモニタ(64)は、複数の容量性要素と結合され、相隔たった平行な導電板(66,67)の間を流れる伝導性電流を、導電板の間の間隔の機械的変形に応答して検出する。
