Assessment of response function in two PET scanners with and without interplane septa

Author

Michel, C. ; Bol, A. ; Spinks, T. ; Townsend, D. ; Bailey, D. ; Grootoonk, S. ; Jones, T.

Author_Institution

PET Lab., Louvain-la-Neuve, Belgium

Volume

10

Issue

3

fYear

1991

fDate

9/1/1991 12:00:00 AM

Firstpage

240

Lastpage

248

Abstract

The authors have assessed the response function both experimentally and theoretically for two commercial tomographs: CTI 931/08-12 and CTI 953B with and without interplane septa. Monte Carlo simulations were undertaken using the GEANT package from CERN. Spatial resolution (tomographic and axial) was calculated for line sources at various positions in the field of view. Sensitivity and scatter fraction (SF) were calculated for various source geometries as a function of energy discrimination. A very realistic response function in positron emission tomography (PET) is obtained by Monte Carlo methods, using global parameters to account for unsimulated phenomena such as scintillation light transport inside a detector block and its sharing among the various phototubes. Minor discrepancies remain for sensitivity and SF at high energy thresholds and may probably be explained by introducing the observed dispersion in the energy response for the various crystals within a detector block

Keywords

biomedical equipment; computerised tomography; radioisotope scanning and imaging; GEANT package; Monte Carlo simulations; PET scanners; crystals; energy discrimination; energy response; global parameters; interplane septa; line sources; medical diagnostic imaging; nuclear medicine; response function; scintillation light transport; spatial resolution; Costs; Crystals; Detectors; Electromagnetic scattering; Geometry; Light scattering; Packaging; Particle scattering; Positron emission tomography; Whole-body PET;

fLanguage

English

Journal_Title

Medical Imaging, IEEE Transactions on

Publisher

ieee

ISSN

0278-0062

Type

jour

DOI

10.1109/42.97571

Filename

97571