= Arterial input function
{wiki=Arterial_input_function}
The arterial input function (AIF) is a critical concept in pharmacokinetics and biomedical imaging, particularly in the context of dynamic contrast-enhanced imaging techniques, such as MRI or PET scans. The AIF describes how a contrast agent or tracer concentration changes over time in the bloodstream after its administration. In the context of imaging, the AIF is used to quantify tissue perfusion and evaluate various physiological and pathological conditions.
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