Patent ID: 7173998

Claim:
A CT system, comprising: a rotatable gantry having a bore centrally disposed therein; a table movable fore and aft through the bore and configured to position a subject for CT data acquisition; a high frequency electromagnetic energy projection source positioned within the rotatable gantry and configured to project high frequency electromagnetic energy toward the subject; and a detector array disposed within the rotatable gantry and configured to detect high frequency electromagnetic energy projected by the projection source and impinged by the subject, wherein the detector array comprises: a plurality of scintillators arranged in a scintillator array; a plurality of photodiodes arranged in a photodiode array that comprises a light reception substantially planar surface; and a 2D gridded light collimator plate array having a plurality of collimator plates that collectively define a plurality of light transmission cavities disposed between the plurality of scintillators and the plurality of photodiodes, the plurality of collimator plates formed of light reflective material and arranged such that each light transmission cavity is disposed entirely between the light reception substantially planar surface of the photodiode array and a light emission surface of a scintillator; wherein the 2D gridded light collimator plate array extends to the light reception substantially planar surface of the photodiode array substantially without encroachment past the light reception substantially planar surface of the photodiode array.