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[Detection of A-P shunt by MR angiography]
T Takahashi1, O Sato, S Naruse
1Department of Radiology, Kyoto Prefectural University of Medicine.
Nihon Igaku Hoshasen Gakkai Zasshi. Nippon Acta Radiologica
|February 25, 1991
Abstract:
Magnetic Resonance Angiography using a time-of-flight method was performed on two cases with arterial-portal shunting (A-P shunt). Each case was examined both with and without presaturation applied above the diaphragms. Signal intensity in the portal vein on these cases decreased with presaturation. This presaturation normally eliminates signal from inflowing spins in the artery but never effect on that in portal vein. Therefore the decrease of signal intensity in the portal vein with presaturation indicates the arterial inflow to the portal vein.