TY - GEN
T1 - Iterative image reconstruction for low-dose x-ray CT using a sinogram restoration induced edge-preserving prior
AU - Bian, Zhaoying
AU - Huang, Jing
AU - Ma, Jianhua
AU - Zhang, Hua
AU - Liang, Zhengrong
AU - Chen, Wufan
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/7/29
Y1 - 2014/7/29
N2 - Low-dose x-ray computed tomography (CT) scan is clinically desired. However, the quality of low-dose CT image is severely degraded due to excessive photon quantum noise and electronic noise. To improve the quality of CT image with lower milliampere-seconds (mAs), in this study, we developed an iterative image reconstruction algorithm based on the maximum a posterior (MAP) principle. To preserve the edges of the reconstructed image, an edge-preserving prior was designed using a reference image reconstructed from the restored sinogram via a sinogram restoration induced non-local means image filter. For simplicity, the present approach is named as "MAP-SRNLM". Experimental results demonstrate that the present algorithm can achieve more significant gains than the existing algorithms in terms of noise reduction, contrast-to-noise ratio and resolution preservation.
AB - Low-dose x-ray computed tomography (CT) scan is clinically desired. However, the quality of low-dose CT image is severely degraded due to excessive photon quantum noise and electronic noise. To improve the quality of CT image with lower milliampere-seconds (mAs), in this study, we developed an iterative image reconstruction algorithm based on the maximum a posterior (MAP) principle. To preserve the edges of the reconstructed image, an edge-preserving prior was designed using a reference image reconstructed from the restored sinogram via a sinogram restoration induced non-local means image filter. For simplicity, the present approach is named as "MAP-SRNLM". Experimental results demonstrate that the present algorithm can achieve more significant gains than the existing algorithms in terms of noise reduction, contrast-to-noise ratio and resolution preservation.
KW - Low-dose
KW - Non-local means
KW - Sinogram restoration
KW - X-ray computed tomography
UR - https://www.scopus.com/pages/publications/84927929903
U2 - 10.1109/isbi.2014.6868081
DO - 10.1109/isbi.2014.6868081
M3 - Conference contribution
AN - SCOPUS:84927929903
T3 - 2014 IEEE 11th International Symposium on Biomedical Imaging, ISBI 2014
SP - 1160
EP - 1163
BT - 2014 IEEE 11th International Symposium on Biomedical Imaging, ISBI 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 IEEE 11th International Symposium on Biomedical Imaging, ISBI 2014
Y2 - 29 April 2014 through 2 May 2014
ER -