Fan-beam reconstruction from a straight line of source points

Author

Smith, Bruce D. ; Singh, Tarkeshwar

Author_Institution

Dept. of Electr. & Comput. Eng., Cincinnati Univ., OH, USA

Volume

12

Issue

1

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

10

Lastpage

18

Abstract

A fan-beam tomographic reconstruction algorithm is developed for source points distributed along a straight line. It is shown that, in theory, a perfect reconstruction is possible from an infinitely long straight line. Using computer simulations it is verified that using a finite segment of a straight line, it is possible to reconstruct images with quality comparable to those obtained when the source points are distributed along a circle. It is shown that the two parameters that most affect the image quality are the length of source point line, and the distance from the object to the source point line. In addition, a postreconstruction technique is developed that substantially improves the quality of images reconstructed from the straight line

Keywords

computerised tomography; image reconstruction; computer simulations; fan-beam tomographic reconstruction algorithm; image quality improvement; infinitely long straight line; medical diagnostic imaging; postreconstruction technique; source points; Cameras; Computed tomography; Computer simulation; Convolution; Detectors; Image quality; Image reconstruction; Image segmentation; Interpolation; Positrons;

fLanguage

English

Journal_Title

Medical Imaging, IEEE Transactions on

Publisher

ieee

ISSN

0278-0062

Type

jour

DOI

10.1109/42.222661

Filename

222661