Imaging properties of a half-inch sodium iodide gamma camera

Author

Turkington, Timothy G. ; Laymon, Charles M. ; Coleman, R. Edward ; Patton, James A.

Author_Institution

Dept. of Radiol., Duke Univ., Durham, NC, USA

Volume

2

fYear

1996

Firstpage

1162

Abstract

Because of the interest in low-cost instrumentation for imaging positron emitters, and because of the low detection efficiency of conventional 3/8" NaI(TI) gamma cameras for 511 keV photons, basic imaging characteristics have been evaluated on a SPECT system with 1/2" NaI(Tl) detectors. Intrinsic spatial resolution was measured at 70, 140, and 511 keV to be 6.3 mm, 4.3 mm, and 3.2 mm FWHM, respectively. Counting efficiency at 511 keV increased 55% over a similar 3/8" system. Other parameters relevant to collimated and coincidence imaging were evaluated, including spatial linearity, spatial resolution vs. incidence angle, and energy resolution. Performance was considered to be acceptable for conventional applications, and significantly improved for 511 keV applications

Keywords

gamma-ray apparatus; gamma-ray detection; single photon emission computed tomography; sodium compounds; solid scintillation detectors; thallium; NaI(Tl) detectors; NaI:Tl; SPECT system; coincidence imaging; collimated imaging; energy resolution; half-inch sodium iodide gamma camera; imaging properties; incidence angle; low-cost instrumentation; positron emitters; spatial linearity; spatial resolution; Cameras; Collimators; Gamma ray detection; Gamma ray detectors; Instruments; Linearity; Optical imaging; Positrons; Single photon emission computed tomography; Spatial resolution;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium, 1996. Conference Record., 1996 IEEE

ISSN

1082-3654

Print_ISBN

0-7803-3534-1

Type

conf

DOI

10.1109/NSSMIC.1996.591613

Filename

591613