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A, NCCT demonstrates scattered sulcal SAH (arrows). B, DSA, right ICA oblique lateral projection, demonstrates subtle areas of vessel narrowing and dilation in several small-caliber arteries. C and D, MIP reformats from CTA performed the same day demonstrate normal large and medium right MCA branches (C) but do not convincingly demonstrate the abnormal small-caliber arteries (arrowhead, D), illustrating the limitations of CTA.
