Carsten Oliver Schirra,Axel Thran,Heiner Daerr,Ewald Roessl
申请号：
US14889899
公开号：
US09750471B2
申请日:
2014.05.10
申请国别(地区):
US
年份:
2017
代理人:
摘要：
A method includes determining calibration factors for calibrating photon-counting detectors of a spectral imaging system by combining a heuristic calibration of the photon-counting detectors and an analytical calibration of the photon-counting detectors and generating a set of photon-counting calibration factors based on the combining of the a heuristic calibration and the analytical calibration. The photon-counting calibration factors, when applied to measured energy-resolved data from the photon-counting detectors of a spectral CT scan of a subject or object, mitigate spectral distortion caused by a radiation intensity profile shaper that filters a radiation beam of the spectral CT scan.
