Energy-resolved photon counting for CT

Details Energy-resolved photon counting for CT Energy-resolved photon counting for CT

2006-04-25

2010-02-23

Kao, Chih-Cheng G (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

C378S005000

Reexamination Certificate

active

07668289

ABSTRACT:
Spectral CT systems require cheap detectors with high energy resolution. According to an aspect of the present invention, a computer tomography apparatus comprises a detector element which is segmented into a plurality of sub-pixels. Each sub-pixel has at least two thresholds and counting channels, wherein the second threshold for each sub-pixel varies over the nominal detector element. This may provide for an improved energy-resolved photon counting.

REFERENCES:
patent: 5943388 (1999-08-01), Tumer
patent: 2004/0129887 (2004-07-01), Vydrin et al.
patent: 2006/0056581 (2006-03-01), Hoffman et al.
patent: 0222018 (2002-03-01), None
patent: WO 2004002316 (2004-01-01), None
patent: 2004047140 (2004-06-01), None

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