TY - GEN
T1 - A simulation study on basis material composition for dual energy CT imaging at high-energy level
AU - Xinhui, Duan
AU - Li, Zhang
AU - Jianping, Cheng
AU - Zhiqiang, Chen
AU - Yuxiang, Xing
PY - 2008
Y1 - 2008
N2 - Quantitative dual energy computed tomography (DECT) allows to obtain both density and atomic number andthus can provide information about material composition.In this paper, a DECT reconstruction method for high energy X-rays (1∼1OMV) is proposed based on a basis material decomposition model. Our method is to be adapted for cargo inspection. The difTerence from conventional DECT methods is derived from considering pair-production effect in reconstruction. This is unnecessary for DECT In usual energy level (lower than IMV). Therefore, an approximation of the attenuation process is made: attenuation of photoelectric effect is ignored our reconstruction due to its tiny contribution to total attenuation of multi-MY Xray beams. Under this assumption, we set up our mathematical models based on the framework of the basis material method for DECT. Numerical experiments are performed to validate the effectiveness of our method. Results shows that our assumption and method are reasonable and feasible to be applied to real data. Discussion of the results and possible improvements for future work are presented in the end.
AB - Quantitative dual energy computed tomography (DECT) allows to obtain both density and atomic number andthus can provide information about material composition.In this paper, a DECT reconstruction method for high energy X-rays (1∼1OMV) is proposed based on a basis material decomposition model. Our method is to be adapted for cargo inspection. The difTerence from conventional DECT methods is derived from considering pair-production effect in reconstruction. This is unnecessary for DECT In usual energy level (lower than IMV). Therefore, an approximation of the attenuation process is made: attenuation of photoelectric effect is ignored our reconstruction due to its tiny contribution to total attenuation of multi-MY Xray beams. Under this assumption, we set up our mathematical models based on the framework of the basis material method for DECT. Numerical experiments are performed to validate the effectiveness of our method. Results shows that our assumption and method are reasonable and feasible to be applied to real data. Discussion of the results and possible improvements for future work are presented in the end.
KW - Computed tomography(CT)
KW - Dual energy
KW - High energy
KW - Reconstruction algorithm
UR - http://www.scopus.com/inward/record.url?scp=67649159886&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=67649159886&partnerID=8YFLogxK
U2 - 10.1109/NSSMIC.2008.4774637
DO - 10.1109/NSSMIC.2008.4774637
M3 - Conference contribution
AN - SCOPUS:67649159886
SN - 9781424427154
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 1271
EP - 1273
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 -