Fig. 3.

Surgically-proven cholangiocarcinoma in segment 5 of the liver.

A. Precontrast T2-weighted turbo spin-echo image shows a heterogeneously hyperintense lesion (arrows) with mild capsular retraction in the right lobe of the liver (arrowhead).

B. Precontrast T1-weighted in-phase gradient-echo image depicts a hypointense mass (arrow).

C. On this T1-weighted out-of-phase gradient-echo image obtained after the administration of ferumoxides, the lesion shows peripheral rim enhancement (arrows).

D. T1-weighted in-phase gradient-echo image obtained after the administration of ferumoxides shows that the lesion (arrows) has become slightly hyperintense to the liver.

E. On this T2*-weighted gradient-echo image obtained after the administration of ferumoxides, the lesion (arrow) has become very hyperintense to the liver. Note that this accumulation phase image provides excellent contrast and lesion conspicuity.