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MR imaging perfusion measurements in four DVAs
Case 1Case 2Case 3Case 4Mean
Age/Sex44/F31/F35/M60/M
draining vein diameter (mm)3.801.005.502.60
CBF ratio*3.514.8915.801.316.38
CBV ratio4.274.228.473.395.09
MTT ratio1.841.371.221.641.52
TTP ratio1.111.051.071.081.08
  • * A ratio was computed for each parameter by drawing a region of interest around the area of signal abnormality associated with the DVA (ROIDVA) and a region of interest around a similar area of uninvolved contralateral brain (ROIcontra). The ratio was computed by dividing the mean signal intensity of ROIDVA by the mean signal intensity of ROIcontra.