title: Evaluation of a thyroid fluorescent scanning system of concentric source-detector design.
abstract: A concentric source-detector system for thyroid fluorescent scanning is described, including fundamental parameters of system response and adaptation of a conventional rectilinear scanner for use with it. The basic system consists of twenty 1-Ci sources of 241Am, a 500-mm2 Si(Li) detector, and associated pulse-height electronics. The image-forming equipment of the rectilinear scanner is retained. We have developed a clinical imaging technique that provides a photon density of 600-800 counts/cm2 over the thyroid gland in subjects with normal iodine pools. Comparisons are made between the outrigger design for fluorescent scanning and conventional emission scanning.
mesh_terms: D000576:Americium; D005453:Fluorescence; D006801:Humans; D007455:Iodine / Q000032:analysis*; D011877:Radionuclide Imaging / Q000295:instrumentation*; D013960:Thyroid Function Tests / Q000295:instrumentation*
chemical_list: D007455:Iodine; D000576:Americium