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(a) 46% stenosis in a 2.6 mm left common carotid artery in a pig. (b). Pressure transducer measurement that found a 6 mm Hg pressure drop. (C) PC VIPR angiogram. (d) Pressure map indicating a 7 mm Hg pressure drop. Adapted from Lum et al. (e) Comparison of MR and guidewire pressure measurements.
