Abstract
Using gadolinium-DTPA-enhanced magnetic resonance imaging (MRI), 91 examinations of a brain infarction were conducted in 33 patients said patients ranging in age from 26 to 90 years old. Thirty of these examinations involved a cortical infarction and 61 a perforator area infarction, the onset of these infarctions ranging from O to 114 days. It was found that contrast enhancement of these lesions was most prominent at about two weeks after onset, and that the enhancement of cortical lesions lasted longer than that of perforator lesions. Further, differentiation between the infarction and its perifocal edema was difficult to determine in T2-weighted images, whereas Gadolinium-enhanced T1-weighted MRI clearly revealed the area of the infarction. Also, in cases of multiple infarctions, gadolinium-enhanced MRI was found useful in distinguishing recent lesions from older lesions.
