TY - GEN
T1 - Multi-view scatter estimation for moving blocker scatter correction of CBCT
AU - Zhao, Cong
AU - Ouyang, Luo
AU - Wang, Jing
AU - Jin, Mingwu
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2017/10/16
Y1 - 2017/10/16
N2 - The moving blocker method is economic and effective for scatter correction (SC) of cone-beam computed tomography (CBCT). However, at the regions with large intensity transition in the projection images in the axial blocker moving direction, the estimation of scatter signal from blocked regions in a single projection view can produce large errors, which can cause significant artifacts in reconstructed images and null the usability of these regions. In this work, we propose to use the adjacent multi-view projection images to jointly estimate scatter signal more accurately. The experimental results using CatPhan600 CBCT data show that the new method can effectively suppress the estimation errors of scatter signal and lead to much improved image quality in these regions. This development will expand the utility of moving blocker-based SC for the target with sharp intensity changes in the projection images, such as bone/lung and body/air interfaces.
AB - The moving blocker method is economic and effective for scatter correction (SC) of cone-beam computed tomography (CBCT). However, at the regions with large intensity transition in the projection images in the axial blocker moving direction, the estimation of scatter signal from blocked regions in a single projection view can produce large errors, which can cause significant artifacts in reconstructed images and null the usability of these regions. In this work, we propose to use the adjacent multi-view projection images to jointly estimate scatter signal more accurately. The experimental results using CatPhan600 CBCT data show that the new method can effectively suppress the estimation errors of scatter signal and lead to much improved image quality in these regions. This development will expand the utility of moving blocker-based SC for the target with sharp intensity changes in the projection images, such as bone/lung and body/air interfaces.
UR - http://www.scopus.com/inward/record.url?scp=85041853587&partnerID=8YFLogxK
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U2 - 10.1109/NSSMIC.2016.8069477
DO - 10.1109/NSSMIC.2016.8069477
M3 - Conference contribution
AN - SCOPUS:85041853587
T3 - 2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop, NSS/MIC/RTSD 2016
BT - 2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop, NSS/MIC/RTSD 2016
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop, NSS/MIC/RTSD 2016
Y2 - 29 October 2016 through 6 November 2016
ER -