TY - GEN
T1 - Complete scheme for beam hardening correction in small animal computed tomography
AU - De Molina, C.
AU - Sisniega, A.
AU - Vaquero, J. J.
AU - Desco, M.
AU - Abella, M.
PY - 2012
Y1 - 2012
N2 - CT images are often affected by beam hardening artifacts due to the polyenergetic nature of the X-ray beam. Several correction methods have been proposed to be included in an FDK reconstruction scheme, which is still the prefered reconstruction algorithm in commercial X-ray CT scanners. In this work, we present a complete correction scheme for beam hardening artifact correction in an FDK-based reconstruction scenario that accounts for both cupping artifact and dark streaks. The proposed method substitutes the need of the knowledge of the spectrum by empirical measurements and two parameters. It includes two steps: a linearization step of projection data and a post-reconstruction step. Evaluation done in real studies acquired with a cone-beam micro-CT scanner showed an average cupping reduction of 80 % in homogeneous phantoms and 72% in rodent studies. The correction scheme can be incorporated easily in any cone beam micro-CT scanner.
AB - CT images are often affected by beam hardening artifacts due to the polyenergetic nature of the X-ray beam. Several correction methods have been proposed to be included in an FDK reconstruction scheme, which is still the prefered reconstruction algorithm in commercial X-ray CT scanners. In this work, we present a complete correction scheme for beam hardening artifact correction in an FDK-based reconstruction scenario that accounts for both cupping artifact and dark streaks. The proposed method substitutes the need of the knowledge of the spectrum by empirical measurements and two parameters. It includes two steps: a linearization step of projection data and a post-reconstruction step. Evaluation done in real studies acquired with a cone-beam micro-CT scanner showed an average cupping reduction of 80 % in homogeneous phantoms and 72% in rodent studies. The correction scheme can be incorporated easily in any cone beam micro-CT scanner.
UR - http://www.scopus.com/inward/record.url?scp=84881607028&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84881607028&partnerID=8YFLogxK
U2 - 10.1109/NSSMIC.2012.6551880
DO - 10.1109/NSSMIC.2012.6551880
M3 - Conference contribution
AN - SCOPUS:84881607028
SN - 9781467320306
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 3835
EP - 3838
BT - 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2012
T2 - 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2012
Y2 - 29 October 2012 through 3 November 2012
ER -