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Rotating laminar emission camera with GE‐Detector: An analysis
Author(s) -
Mauderli Walter,
Fitzgerald Lawrence T.,
Urie Marcia M.,
Tosswill Christopher H.
Publication year - 1981
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.595037
Subject(s) - laminar flow , detector , medical imaging , optics , physics , medical physics , nuclear medicine , computer science , artificial intelligence , medicine , thermodynamics
Design criteria for a germanium detector emission camera with laminar collimator‐detector geometry are reported. In this design, parallel plates above a grooved germanium slab form detector channels which accumulate data in multiple projections through 180°. Activity distribution is determined through mathematical reconstruction from the projections. The laminar design has greater efficiency than a hole‐collimated device due to a favorable open area ratio and due to collimation in only one dimension. The relative sensitivity at the center of the detector strip increases with detector length and distance from collimator face. Spatial resolution depends upon the design geometry (septal penetration and scatter within the crystal are of such small magnitude that degradation of the point spread function is minimal). A 30 channel prototype device (ROLEC) shows good correlation with theoretically determined PSF and signal–to–noise ratio (SNR). Measuring times projected for a clinical sized device (300 mm diam) are about 4.6 times that of the Anger camera (with same SNR) and high resolution collimator. Key words: emission camera, laminar camera, germanium camera