Contrast recovery of hyperfixation in SPECT: interest of fan beam collimators

Author

Véra, Pierre ; De Dreuille, Olivier ; Bendriem, Bernard ; Gardin, Isabelle ; Stiévenart, Jean Louis ; Paré, Christian ; Bourguignon, Michel ; Bok, Bernard ; Syrota, André

Author_Institution

Service de Med. Nucl., Hopital Beaujon, Clichy, France

Volume

2

fYear

1995

fDate

21-28 Oct 1995

Firstpage

1102

Abstract

The influence of the collimator on the contrast recovery of hyperfixation was studied in SPECT. With a dual headed SPECT system, three parallel collimators sets and 2 fan beam collimators sets were tested with a Jaszczak´s phantom. The 6 spheres of the phantom were filled with ^99mTc and 4 background levels were successively obtained progressively by filling the cylinder of the phantom providing 4 hyperfixation level. The effect of the angular and projection matrix sampling were tested. Using ANOVA, the authors demonstrated higher contrast recovery of hyperfixation when using fan beam collimators. Moreover, this experimental study shows that when using fan beam collimators it is preferable to acquire 64 projections rather than 128 for a chosen fixed acquisition time

Keywords

biomedical equipment; single photon emission computed tomography; ^99mTc; ANOVA; Jaszczak´s phantom; SPECT hyperfixation contrast recovery; Tc; acquisition time; angular sampling; background levels; dual headed SPECT system; fan beam collimators; medical diagnostic imaging; nuclear medicine; phantom spheres; projection matrix sampling; Analysis of variance; Collimators; Conducting materials; Filling; Imaging phantoms; Sampling methods; Signal to noise ratio; Single photon emission computed tomography; System testing; Transmission line matrix methods;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference Record, 1995., 1995 IEEE

Conference_Location

San Francisco, CA

Print_ISBN

0-7803-3180-X

Type

conf

DOI

10.1109/NSSMIC.1995.510456

Filename

510456