single photon emission computed tomography

noun

Medical Definition of single photon emission computed tomography 

: a medical imaging technique that is used especially for mapping brain function and that is similar to positron-emission tomography in using the photons emitted by the agency of a radioactive tracer to create an image but that differs in being able to detect only a single photon for each nuclear disintegration and in generating a lower-quality image abbreviation SPECT

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