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Red curve represents arterial input function (AIF) ROI; blue represents venous output function (VOF). AIF placed orthogonal to the slice in distal ICA to reduce volume averaging. VOF placed over torcula heterophili.
Long delay after injection of contrast before the intensity curves start rising. The venous peak and decline are not reached within the 50 second perfusion scan window. The arterial peak is also not sharp. Appearances consistent with poor cardiac output.
Apparent raised MTT in both hemispheres (left > right) but likely inaccurate due to poor cardiac function.