TY - GEN
T1 - Sampling of shifted fan beam projections for region of interest reconstruction
AU - Brokish, Jeffrey
AU - Bresler, Yoram
PY - 2005
Y1 - 2005
N2 - The sampling requirements in fan-beam tomography are well known and provide an estimate of the number of projections required for accurate reconstruction of the entire image. Here we consider the problem of reconstructing a small, off-center subregion of the object. We show that a subregion can be reconstructed from a smaller set of projections, reducing the computation required to form the image. The analysis requires the study of the essential support of the Fourier transform of shifted fan beam projections, which have not previously been analyzed.
AB - The sampling requirements in fan-beam tomography are well known and provide an estimate of the number of projections required for accurate reconstruction of the entire image. Here we consider the problem of reconstructing a small, off-center subregion of the object. We show that a subregion can be reconstructed from a smaller set of projections, reducing the computation required to form the image. The analysis requires the study of the essential support of the Fourier transform of shifted fan beam projections, which have not previously been analyzed.
UR - http://www.scopus.com/inward/record.url?scp=33846563613&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33846563613&partnerID=8YFLogxK
U2 - 10.1109/NSSMIC.2005.1596695
DO - 10.1109/NSSMIC.2005.1596695
M3 - Conference contribution
AN - SCOPUS:33846563613
SN - 0780392213
SN - 9780780392212
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 1867
EP - 1870
BT - 2005 IEEE Nuclear Science Symposium Conference Record -Nuclear Science Symposium and Medical Imaging Conference
T2 - Nuclear Science Symposium Conference Record, 2005 IEEE
Y2 - 23 October 2005 through 29 October 2005
ER -