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Phase‐shift time curves following a bolus injection of gadolinium contrast agent were registered for grey‐matter regions and large vessels in 14 subjects. Deconvolving a tissue phase‐shift curve with a phase‐based arterial input function resulted in a tissue residue function R(t). The peak value of R(t) provided a relative cerebral blood flow (CBF) index, while the area‐to‐height ratio of R(t) provided...
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