TY - GEN
T1 - Uniformity correction in photon-counting X-ray detector based on basis material decomposition
AU - Wang, Xiaolan
AU - He, Xin
AU - Taguchi, Katsuyuki
AU - Patt, Bradley E.
AU - Wagenaar, Douglas J.
AU - Frey, Eric C.
PY - 2008/12/1
Y1 - 2008/12/1
N2 - We have developed and evaluated a method to correct for detector cell response variations in photon-counting X-ray detectors with energy discrimination capability. With these detectors, variations in energy thresholds or energy response of the detector cells can result in spectral-dependent nonuniformities in sinograms that produce rings in reconstructed images. The proposed method is basis material decompositionbased and corrects variations in the spectral sensitivity of detector cells to reflect the characteristics of a standard detector cell. requires calibration similar to that used in basis material decomposition methods and does not require knowledge of the exact energy spectrum, energy thresholds, or energy response of the individual detector cells. Both simulation and physical experiments studies showed substantial reduction in nonuniformity in sinograms and of rings in reconstructed images.
AB - We have developed and evaluated a method to correct for detector cell response variations in photon-counting X-ray detectors with energy discrimination capability. With these detectors, variations in energy thresholds or energy response of the detector cells can result in spectral-dependent nonuniformities in sinograms that produce rings in reconstructed images. The proposed method is basis material decompositionbased and corrects variations in the spectral sensitivity of detector cells to reflect the characteristics of a standard detector cell. requires calibration similar to that used in basis material decomposition methods and does not require knowledge of the exact energy spectrum, energy thresholds, or energy response of the individual detector cells. Both simulation and physical experiments studies showed substantial reduction in nonuniformity in sinograms and of rings in reconstructed images.
UR - http://www.scopus.com/inward/record.url?scp=67649188231&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=67649188231&partnerID=8YFLogxK
U2 - 10.1109/NSSMIC.2008.4774338
DO - 10.1109/NSSMIC.2008.4774338
M3 - Conference contribution
AN - SCOPUS:67649188231
SN - 9781424427154
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 4902
EP - 4905
BT - 2008 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2008
T2 - 2008 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2008
Y2 - 19 October 2008 through 25 October 2008
ER -