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AJNR - American Journal of Neuroradiology

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MR Imaging Enhancement Patterns as Predictors of Hemorrhagic Transformation in Acute Ischemic Stroke

Katie D. Vo^a, Fernando Santiago^b, Weili Lin^c, Chung Y. Hsu^b, Yueh Lee^c and Jin-Moo Lee^b

^a Mallinckrodt Institute of Radiology, Washington University School of Medicine, St Louis, MO
^b Department of Neurology, Washington University School of Medicine, St Louis, MO
^c Department of Radiology and Biomedical Engineering, University of North Carolina at Chapel Hill

View larger version (161K): [in a new window]   FIG 1. In three patients, initial MR images demonstrate parenchymal enhancement within the area of ischemia. All three patients subsequently developed HT: Patients 6 and 2 developed large SHs (detected with CT), while patient 5 developed a small AH (detected with T2*-weighted MR imaging). F/u indicates follow-up; T1WI, T1-weighted image.

View larger version (50K): [in a new window]   FIG 2. Initial MR images show vascular enhancement in the territory of the right MCA (left). This patient developed a petechial AH, which was detected on T2*- and T2-weighted images (right) obtained 1 week later. T1WI indicates T1-weighted image; T2WI, T2-weighted image