a: no obvious tumor vasculature is visible in the axial T1-weighted imaging or b: the axial T2-weighted imaging; c: the contrast-enhanced axial T1-weighted image shows the mass with irregular enhancement and no obvious tumor veins were detected; d: non-contrast-enhanced SWI shows considerably more detail of the internal architecture than T1-weighted DCE. Scattered linear hypointense signals (arrows) suggest radiating veins in the center of the mass. Characterizing venous vasculatures of hepatocellular carcinoma using a multi-breath-hold two-dimensional susceptibility-weighted imaging: Chang SX, Li GW, Chen Y, Bao H, Zhou L, Yuan J, Wu DM, Dai YM - PloS one (2013). Not altered. CC.