Figure 4From: Cholangiocarcinoma: spectrum of appearances on Gd-EOB-DTPA-enhanced MR imaging and the effect of biliary function on signal intensity Patients with normal TB levels (NTB group, solid line) had higher relative signal intensities (RSIs) of the abdominal aorta (a), portal veins (b) and spleen (c) than those with elevated TB levels (ETB group, dotted line) on AP, PVP, and EP, and lower RSIs on HP and BP. Back to article page