Title :
Imaging properties of a half-inch sodium iodide gamma camera
Author :
Turkington, T.G. ; Laymon, C.M. ; Coleman, R.E.
Author_Institution :
Dept. of Radiol., Duke Univ., Durham, NC
fDate :
6/1/1997 12:00:00 AM
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(Tl) 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 :
biomedical equipment; image resolution; single photon emission computed tomography; sodium compounds; thallium; 0.375 in; 3.2 to 6.3 mm; 70 to 511 keV; NaI:Tl; detection efficiency; half-inch sodium iodide gamma camera; imaging properties; incidence angle; intrinsic spatial resolution; low-cost instrumentation; medical diagnostic imaging; medical instrumentation; nuclear medicine; positron emitters; Cameras; Collimators; Gamma ray detection; Gamma ray detectors; Instruments; Linearity; Optical imaging; Positrons; Single photon emission computed tomography; Spatial resolution;
Journal_Title :
Nuclear Science, IEEE Transactions on
