Emission computed tomography

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Emission computed tomography
ICD-9-CM 92.0-92.1
MeSH D014055
OPS-301 code 3-72-3-75

Emission computed tomography (ECT) is a type of tomography involving radioactive emissions.

Types include positron emission tomography (PET) and Single-photon emission computed tomography (SPECT).

The imaging agent used in SPECT emits gamma rays, as opposed to the positron emitters (such as 18F) used in PET. There are a range of radiotracers (such as 99mTc, 111In, 123I, 201Tl) that can be used, depending on the specific application.