A 77-year-old woman underwent MRI examination because of altered mental status. Her complete examination included 12 pulse sequences, but all significant abnormalities are apparent in images derived from the three pulse sequences that comprised the abbreviated examination described in phase 1 of this study. A sagittal T1-weighted image (A) reveals no apparent abnormality. Axial T2-weighted FLAIR images (B) demonstrate multiple small hyperintense lesions in deep gray matter and white matter structures. The lesions are markedly hyperintense in diffusion-weighted images (C) and apparent diffusion coefficient maps derived from the DWI sequence (D) show restricted diffusion within the lesions, confirming that they are ischemic infarcts.
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