TY - GEN
T1 - C-arm based cone-beam CT using a two-concentric-arc source trajectory
T2 - Medical Imaging 2008 - Physics of Medical Imaging
AU - Zambelli, Joseph
AU - Zhuang, Tingliang
AU - Nett, Brian E.
AU - Riddell, Cyril
AU - Belanger, Barry
AU - Chen, Guang Hong
PY - 2008
Y1 - 2008
N2 - The current x-ray source trajectory for C-arm based cone-beam CT is a single arc. Reconstruction from data acquired with this trajectory yields cone-beam artifacts for regions other than the central slice. In this work we present the preliminary evaluation of reconstruction from a source trajectory of two concentric arcs using a flat-panel detector equipped C-arm gantry (GE Healthcare Innova 4100 system, Waukesha, Wisconsin). The reconstruction method employed is a summation of FDK-type reconstructions from the two individual arcs. For the angle between arcs studied here, 30°, this method offers a significant reduction in the visibility of cone-beam artifacts, with the additional advantages of simplicity and ease of implementation due to the fact that it is a direct extension of the reconstruction method currently implemented on commercial systems. Reconstructed images from data acquired from the two arc trajectory are compared to those reconstructed from a single arc trajectory and evaluated in terms of spatial resolution, low contrast resolution, noise, and artifact level.
AB - The current x-ray source trajectory for C-arm based cone-beam CT is a single arc. Reconstruction from data acquired with this trajectory yields cone-beam artifacts for regions other than the central slice. In this work we present the preliminary evaluation of reconstruction from a source trajectory of two concentric arcs using a flat-panel detector equipped C-arm gantry (GE Healthcare Innova 4100 system, Waukesha, Wisconsin). The reconstruction method employed is a summation of FDK-type reconstructions from the two individual arcs. For the angle between arcs studied here, 30°, this method offers a significant reduction in the visibility of cone-beam artifacts, with the additional advantages of simplicity and ease of implementation due to the fact that it is a direct extension of the reconstruction method currently implemented on commercial systems. Reconstructed images from data acquired from the two arc trajectory are compared to those reconstructed from a single arc trajectory and evaluated in terms of spatial resolution, low contrast resolution, noise, and artifact level.
KW - CT
KW - SYS
UR - http://www.scopus.com/inward/record.url?scp=43149124650&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=43149124650&partnerID=8YFLogxK
U2 - 10.1117/12.772781
DO - 10.1117/12.772781
M3 - Conference contribution
C2 - 19381355
AN - SCOPUS:43149124650
SN - 9780819470973
T3 - Progress in Biomedical Optics and Imaging - Proceedings of SPIE
BT - Medical Imaging 2008 - Physics of Medical Imaging
Y2 - 18 February 2008 through 21 February 2008
ER -