Figure 6.

The CT HA/AP and MR images of a 71-year-old woman with a 1 cm arterioportal shunt. The gadoxetic acid-enhanced MR image shows (A) a hypervascular nodule (arrow) during the arterial phase and (B) an equivocal hyperintensity (arrow) on the T-2 weighted image, and (C) a perfusion defect (arrow) in the hepatobiliary phase. However, the hypervascular nodule is not visible in (D) the CTHA image or (E) the CTAP image. The false-positive result was correctly diagnosed as a shunt by one of the MRI observers in the second interpretation session. CTAP = CT during arterial portography, CTHA = CT during hepatic arteriography, CT HA/AP = computed tomography during hepatic arteriography and arterial portography, MR = magnetic resonance, MRI = magnetic resonance imaging.