title: [MR of ischemic brain diseases. A comparison with CT, PET (18-fluorodeoxyglucose) and angiographic results].
abstract: The results of MRI and CT in 55 patients with brain infarcts were compared; in 26 of these cases an additional PET examination was obtained in order to study the regional glucose utilisation. MRI was superior to CT, demonstrating 11% more of the infarcts, particularly during the first 24 hours, in small lesions confined to the grey or subcortical white matter and in infratentorial ischemic lesion. On the other hand, only CT was able to show fresh hemorrhage, although MRI was the method of choice to demonstrate old blood collections. To characterise the follow up of an infarct, CT and MRI were similar, except the marginal contrast enhancement sometimes demonstrated by CT studies between the 2nd and 4th week after stroke event. PET was inferior to show details because of its poorer spatial resolution, but anyhow had a high sensitivity and provided additional informations concerning secondary inactivations of brain areas not directly damaged. Additionally PET was able to demonstrate areas of anaerobic glycolysis and lesions of diminished glucose utilisation in TIAs. Small areas of gliosis in the white matter of the cerebral hemispheres were frequently found in patients with cerebro-vascular diseases; they were best shown by MRI, but do not correlate with the extent of vascular stenoses or occlusions, shown by angiography.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002533:Cerebral Angiography; D002544:Cerebral Infarction / Q000175:diagnosis* / Q000000981:diagnostic imaging; D002648:Child; D003847:Deoxyglucose / Q000031:analogs & derivatives; D005260:Female; D005461:Fluorine; D019788:Fluorodeoxyglucose F18; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D008875:Middle Aged; D011868:Radioisotopes; D014055:Tomography, Emission-Computed
chemical_list: D011868:Radioisotopes; D019788:Fluorodeoxyglucose F18; D005461:Fluorine; D003847:Deoxyglucose
vernacular_title: MR bei ischämischen Hirnerkrankungen. Ein Vergleich mit CT, PET (18Fluordeoxyglukose) und angiographischen Ergebnissen.