Detector array and system

Details Detector array and system Detector array and system

2007-06-16

2009-11-17

Glick, Edward J (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

C378S098800, C250S368000

Reexamination Certificate

active

07620143

ABSTRACT:
In some embodiments, an optical mask for a CT detector is disclosed. In some embodiments, the mask is intercalated between a photodiode array and a scintillator array forming the CT detector. In some embodiments, the optical mask may extend along one or more axes and differentially absorbs and/or reflects light emitted from the scintillators at edges of photodiodes forming the diode array, with less absorption or reflection at edges of tiled die forming the diode array than in central portions of each of the die. Through selective absorption and/or reflection, transference of light photons from a scintillator to the photodiode corresponding to a neighboring scintillator is spatially modified, at least partially compensating for spatial differences in crosstalk signals between adjacent pairs of photodiode/scintillator cell elements. This reduction in differential crosstalk reduces artifacts in a reconstructing data descriptive of internal portions of a subject, which improves diagnostic value of the data.

REFERENCES:
patent: 5625662 (1997-04-01), Toth et al.
patent: 2002/0038851 (2002-04-01), Kajiwara et al.
patent: 2005/0111612 (2005-05-01), Ihklef et al.

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