Patent ID: 7141792

Claim:
A radiation detector comprising: a main body; a radiation probe detachably attached to the main body; and a collimator for collimating radiation, the collimator being provided in the distal end portion of the radiation detection probe, the radiation detection probe having: a detection unit including a radiation detection element; a first terminal electrically connected to the radiation detection element; and a cap-shaped shield member mounted to the detection unit so as to cover the radiation detection element, the shield member being made of a material which blocks the radiation, the shield member having a front wall facing the radiation detection element, and a cylindrical side wall extending from the edge of the front wall, the collimator being a through-hole provided in the front wall, the main body having a connector to which the proximal end of the radiation detection probe is detachably mounted, the connector including a second terminal which is detachably connected to the first terminal when the radiation detection probe is mounted to the connector, the radiation detection probe further having: a cap-shaped probe cover which covers the shield member and the detection unit, the probe cover being detachably mounted to the connector; and a seal ring sandwiched between the probe cover and the connector to seal the main body and the radiation detection probe when the probe cover is mounted to the connector.