Patent ID: 7233640

Claim:
A CT detector comprising: a scintillator array having a plurality of scintillators arranged along a first plane; a photodiode array having a plurality of photodiodes arranged along a second plane different from the first plane and parallel to the first plane, and configured to detect illumination of the scintillator array; the first plane and the second plane orthogonal to a direction of x-ray incidence on the scintillator array; and an optical mask formed of optical absorbing material and arranged and extended in major part along a third plane parallel to the first and the second planes, and disposed between the scintillator array and the photodiode array without encroachment upon any of the first plane or the second plane, the optical mask configured to reduce optical transference between a scintillator and a neighboring photodiode, the optical mask located closer to the scintillator array than the plurality of photodiodes.