Comparison study for iterative reconstruction using a pinhole collimator and a rotating-slit collimator

Author

Zhang, Bin ; Zeng, Larry

Author_Institution

Dept. of Radiol., Utah Univ., Salt Lake City, UT

Volume

5

fYear

2005

fDate

23-29 Oct. 2005

Firstpage

2640

Lastpage

2643

Abstract

A rotating-slit system is proposed for small animal imaging. The spatial resolution and noise propagation properties of the rotating-slit system are evaluated and compared with a pinhole system using iterative methods. Our results show that the two systems achieve comparable resolutions, and the rotating-slit system has better noise performance than the pinhole system when the same detector sizes are applied. In addition, the rotating-slit system can be used for ROI reconstruction from truncated projections. This local tomography property of iterative reconstructions is only found for the rotating-slit system, but not found for the pinhole system

Keywords

collimators; image reconstruction; image resolution; iterative methods; medical image processing; noise; single photon emission computed tomography; ROI reconstruction; SPECT; iterative reconstruction; noise propagation; pinhole collimator; rotating-slit collimator; small animal imaging; spatial resolution; Animals; Detectors; Geometry; Image reconstruction; Imaging phantoms; Iterative algorithms; Iterative methods; Optical collimators; Spatial resolution; Tomography;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2005 IEEE

Conference_Location

Fajardo

ISSN

1095-7863

Print_ISBN

0-7803-9221-3

Type

conf

DOI

10.1109/NSSMIC.2005.1596880

Filename

1596880