Advantage of fan beam collimators for contrast recovery of hyperfixation in clinical SPECT

Author

Véra, Pierre ; De Dreuille, Olivier ; Bendriem, Bernard ; Gardin, Isabelle ; Stiévenart, Jean Louis ; Ménard, Jean François ; Parc, C. ; Bourguignon, Michel ; Bok, Bernard ; Syrota, André

Author_Institution

Dept. of Nucl. Med., Hopital Beaujon, Clichy, France

Volume

44

Issue

1

fYear

1997

fDate

2/1/1997 12:00:00 AM

Firstpage

83

Lastpage

89

Abstract

The influence of the collimator on the contrast recovery of hyperfixation was studied using a dual-headed single photon emission computed tomography (SPECT) system with standard clinical acquisition parameters. Three parallel collimator sets and two fan beam collimator sets were tested with a Jaszczak phantom. The six spheres of the phantom were filled with ^99mTc, and four background levels were progressively obtained by adding radioactivity to the cylinder of the phantom, providing four hyperfixation levels. The effects of angular sampling and reconstruction filters have been tested. The statistical analysis was performed with analysis of variance (ANOVA). This study demonstrates the advantage of ultra-high resolution fan beam collimators for contrast recovery of hyperfixation with SPECT when using 64 projections over 360°, in particular when the contrast is low. The authors also demonstrate that fan beam collimators permit smaller size hyperfixation detection

Keywords

biomedical equipment; single photon emission computed tomography; ^99mTc; Jaszczak phantom; Tc; angular sampling; background levels; clinical SPECT; contrast recovery; diagnostic nuclear medicine; hyperfixation; medical instrumentation; parallel collimator sets; radioactivity; reconstruction filters; spheres; statistical analysis; Analysis of variance; Biomedical imaging; Biophysics; Collimators; Filters; Imaging phantoms; Nuclear medicine; Sampling methods; Single photon emission computed tomography; Testing;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.554830

Filename

554830