[Semiquantitative display of regional cerebral blood flow and neuronal function using N-isopropyl-(123I)-p-iodoamphetamine (IMP) and emission tomography].
Between June 1983 and March 1985 197 patients were examined with 123I-IMP brain scintigraphy and ECT. They had various neurological diseases, the majority suffered from cerebrovascular affections. The reference for pathological findings was a group of 14 healthy volunteers. A visual interpretation of the ECT-slices alone is not reliable enough. A semiquantitative assessment of perfusion abnormalities seems to be very important, especially in diffuse or bilateral alterations. The proposed semiquantitative evaluation makes use of the total cerebral accumulation in the control group (35.6 +/- 4.3 cts/pixel/mCi/min) and right-left ratios of 14 paired and fixed regions of interest (ROI) in three ECT slices. The ROIs are related to the anatomical flow supply areas in the brain. The right-left ratios are around 1.0 with a physiological asymmetry of +/- less than 2% (standard deviation). The asymmetry is an important parameter in assessing presence and severity of disease. If pathological findings are diffuse or symmetric, the visual interpretation of scintigrams or the calculation of right-left ratios are often unsuccessful. Thus, the same ROI-data were separated for the right and left hemisphere and drawn as cts/ROI/pixel/mCi in diagrams as profile. The diagram demonstrates perfusion abnormalities semiquantitatively without using calculation of asymmetry, since asymmetry alone cannot differentiate between hypoperfusion of one and hyperperfusion of the contralateral side.
D000328:Adult; D000368:Aged; D000662:Amphetamines; D001927:Brain Diseases / Q000000981:diagnostic imaging* / Q000503:physiopathology; D002560:Cerebrovascular Circulation; D002561:Cerebrovascular Disorders / Q000000981:diagnostic imaging / Q000503:physiopathology; D005260:Female; D006801:Humans; D007457:Iodine Radioisotopes; D020367:Iofetamine; D008297:Male; D008875:Middle Aged; D014055:Tomography, Emission-Computed
D000662:Amphetamines; D007457:Iodine Radioisotopes; D020367:Iofetamine
Ein Beitrag zur semiquantitativen Darstellung der regionalen Hirndurchblutung und neuronalen Funktion mittels N-isopropyl-(123J)-p-Jodoamphetamin (IMP) und Emissionstomographie.