single-photon emission computed tomography (SPECT)

single-photon emission computed tomography (SPECT)

« Back to Glossary Index

Single-photon emission computed tomography (SPECT) is similar to positron emission tomography (PET) in that it uses a radioactive substance (tracer) and a special camera to create 3-D pictures of an internal organ of the body. Like PET, SPECT is particularly useful for looking at blood flow to an organ, such as the heart or brain. The primary difference between the two tests is that the tracers used in SPECT last longer than those used in PET, allowing for a longer time to view the organ at work.

Get SomnusNooze, our e-newsletter

Sign up to receive HF updates, news from the world of sleep research, first-person stories, and more.

You will receive and email from (please check your junk/spam folder if needed) to confirm your subscription to our newsletter through MailChimp. You are not subscribed until you confirm. Thank you for your interest in Hypersomnia Foundation!