Noise equivalent count measurements in a neuro-PET scanner with retractable septa

The noise-equivalent count-rate (NEC) performance of a neuro-positron emission tomography (PET) scanner has been determined with and without interplane septa on uniform cylindrical phantoms of differing radii and in human studies to assess the optimum count rate conditions that realize the maximum g...

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Bibliographic Details
Published inIEEE transactions on medical imaging Vol. 10; no. 3; pp. 256 - 260
Main Authors Bailey, D.L., Jones, T., Spinks, T.J., Gilardi, M.-C., Townsend, D.W.
Format Journal Article
LanguageEnglish
Published United States IEEE 01.09.1991
Subjects
Cyclotrons
Detectors
Event detection
Hospitals
Imaging phantoms
National electric code
Noise measurement
Performance gain
Positron emission tomography
Scattering
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Summary:The noise-equivalent count-rate (NEC) performance of a neuro-positron emission tomography (PET) scanner has been determined with and without interplane septa on uniform cylindrical phantoms of differing radii and in human studies to assess the optimum count rate conditions that realize the maximum gain. In the brain, the effective gain in NEC performance for three-dimensions (3-D) ranges from >5 at low count rates to approximately=3.3 at 200 kcps (equivalent to 37 kcps in 2-D). The gains of the 3-D method assessed by this analysis are significant, and are shown to be highly dependent on count rate and object dimensions.< >
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ISSN:0278-0062
1558-254X
DOI:10.1109/42.97573