Clinical Significance of Scintillation Camera Electronics
نویسنده
چکیده
Recent advances in collimator design and detector size, combined with radiopharmaceuticals having high photon yield, have resulted in diagnostic tests that may deliver photon fluxes in excess of the levels at which scintillation cameras can process the data. Moreover, these high rates of photon input may im pair certain parameters of image quality (1 ,2). For certain diagnostic tests, such as cardiac flows, input rates can exceed 300,000 cps. The observed count rate is not indicative of the input rate during such clinical tests because of variable scatter fractions and nonconstant deadtimes for scintillation cameras (3,4) . Some of the more recent models of the Anger scintillation camera use new electronic designs that allow count rate processing capabilities up to 200,000 cps (5), a level that approaches the needs of standard diagnostic tests in nuclear medicine. The
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