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A resilient locking and sealing arrangement for a multi-channel reflective cavity scintillation detector useful in a CT scanner. The absorption coefficient of the detector window is minimized in order to enhance detector efficiency, by forming such window of layers of woven graphite fiber bonded tog

A resilient locking and sealing arrangement for a multi-channel reflective cavity scintillation detector useful in a CT scanner. The absorption coefficient of the detector window is minimized in order to enhance detector efficiency, by forming such window of layers of woven graphite fiber bonded together with epoxy. The detector window includes resilient sealing means positioned to engage the leading edge of unit cell elements assembled to form a detector array. Resilient lock means force the plate into a reference position and into contact with the resilient sealing means thereby to accurately locate the plate in the array, and also to provide an effective light seal.

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In a scintillation detector having a housing including a pair of arcuate opposed end members carrying slots for receiving collimator plates, a plurality of collimator plates for slidingly but snugly fitting into opposed slots to define a plurality of detector cells, and means associated with each pl

In a scintillation detector having a housing including a pair of arcuate opposed end members carrying slots for receiving collimator plates, a plurality of collimator plates for slidingly but snugly fitting into opposed slots to define a plurality of detector cells, and means associated with each plate for detecting radiation received by its cell and producing an electrical signal in response thereto, the improvement comprising, arcuate stop means intersecting the slots for defining a plate reference position for each cell, window means disposed proximate the arcuate stop for admitting X-radiation but excluding light from the detector cells, resilient sealing means associated with the window and disposed to protrude past the plate reference position into the cells when uncompressed, the resilient sealing means being disposed to engage the plurality of collimator plates at discrete locations to effect an optical seal between adjacent cells, and resilient lock means adapted to bear at discrete locations against each of a plurality of plates for individually urging each of the plurality of plates against the arcuate stop and into the resilient sealing means to lock and seal the associated detector cells.