Image recovery in computer tomography from partial fan-beam data by convex projections

Author

Peng, Hui ; Stark, Henry

Author_Institution

IBM, Thomas, J. Watson Res. Center, Yorktown Heights, NY, USA

Volume

11

Issue

4

fYear

1992

fDate

12/1/1992 12:00:00 AM

Firstpage

470

Lastpage

478

Abstract

For the image recovery process the authors use the convex projections method, also known as the method of projections onto convex sets (POCS). Several incomplete-data geometries, including those associated with limited source travel and beam-blocking internal opacities, are considered. To enable the recovery several prior-knowledge constraints including one associated with the directivity of the image vector are used. The overall recovery algorithm can be practically implemented by exploiting the Toeplitz structure of key operators

Keywords

computerised tomography; Toeplitz structure; beam-blocking internal opacities; computer tomography; convex projections; convex sets; image recovery process; image vector directivity; incomplete-data geometries; key operators; limited source travel; medical diagnostic imaging; partial fan-beam data; prior-knowledge constraints; Bones; Computed tomography; Geometry; Hydrodynamics; Inspection; Interpolation; Joints; Reconstruction algorithms; Surgery; Transmission electron microscopy;

fLanguage

English

Journal_Title

Medical Imaging, IEEE Transactions on

Publisher

ieee

ISSN

0278-0062

Type

jour

DOI

10.1109/42.192682

Filename

192682