Emissions computed tomography
Emission computed tomography (ECT, also emission computed tomography) is the computation of cross-sectional images from the radiation emitted (emitted) by an object , which is possible due to the Radon transformation . The first application was the calculation of the places of origin of the sun's microwave radiation after one year of observation from the earth rotating around the sun.
As a diagnostic imaging method in nuclear medicine for generating sectional images of living organisms, ECT is based on the administration of a radiopharmaceutical , the radiation of which can then be detected outside the body and allows conclusions to be drawn about the distribution of the radiopharmaceutical in the body.
The ECT is to be distinguished from the transmission computed tomography, in which the organism is examined with the help of radiation sources outside the body.
The medical application exists in two variants:
literature
- RJ English, SE Brown: SPECT: Single-photon emission computed tomography: a primer. Society of Nuclear Medicine, New York 1986. (3rd edition. 1995, ISBN 0-932004-43-1 )
- ME Phelps , SR Cherry, M. Dahlborn: PET: physics, instrumentation, and scanners. Springer Science + Business, New York 2010, ISBN 978-1-4419-2183-3 .