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A comparison of the arterial input function (AIF) selection locations (red dot) for computed tomography perfusion plus (CTP+) (upper left) and Vitrea (upper right) along with the corresponding AIF intensity curves for each software. Note that the selected location within CTP+ is on a main artery while the Vitrea location is in a significantly anterior location. This leads to the noisy generated AIF (bottom right) which contains one spike in contrast intensity.
