Figure 5e. (a-c) Transverse 3D T1-weighted spoiled gradient-echo MR images (4/1.6, 12° flip angle) obtained in a patient with hepatocellular carcinoma. (a) Nonenhanced fat-saturated image shows excellent contrast between tumor (arrowheads) and normal liver. Note the high signal intensity (arrow) in the left-sided collecting system, which appeared after a timing bolus was administered. (b) Gadolinium-enhanced arterial phase image shows a heterogeneously enhancing tumor (arrow). (c) Portal-phase gadolinium-enhanced image shows diffuse tumor enhancement (arrow). (d) Transverse 90-second-delayed gradient-echo image (130/4.6, no fat saturation) shows delayed enhancement of the tumor capsule (arrows). (e) Maximum intensity projection reconstructed in an oblique transverse plane (1.5-cm slab) shows the arterial supply to the tumor (arrow) from the right hepatic artery (arrowheads).