Evolution of MRI Findings in Stroke MR images at five subsequent time points in a 67-year-old woman with left hand weakness, left facial droop, and slurred speech. This example shows the typical evolution of the T2 (top row), FLAIR (second row), DWI (third row), ADCCONV (fourth row), and ADCFLAIR (bottom row) of an acute ischemic lesion (right hemisphere). On the ADC maps, the lesion is hypointense up to day 7 and hyperintense at 27 days, making it possible to differentiate the acute from the chronic lesion. On the DWI images, the lesion is hyperintense at all time points so that, by visual inspection, the signal intensity of the lesion on the acute scan cannot be differentiated from that on the chronic scan. On the T2-weighted and FLAIR images, lesion signal intensity increases up to day 4 and remains high thereafter. Note that at 27 days the lesion is more identifiable on the ADCFLAIR map than on the ADC. #Evolution #MRI #Progression #Stroke #CVA #Clinical #Radiology #Interpretation #Findings #Neurology #Evolution #Timeline
