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Fig. 4A —T2 shine-through. Diffusion-weighted images of liver in 62-year-old man with liver metastasis obtained at different b values show ill-defined high-signal-intensity metastasis in right lobe of liver (arrow, C). However, note gallbladder (arrowhead, C) also shows high signal intensity, even on image obtained with b value of 500 s/mm². In this case, high signal intensity of gallbladder is not due to restricted water diffusion but to T2 shine-through. Note intrinsic high signal intensity of gallbladder on T2-weighted (b = 0 s/mm²) image (A) due to its long T2 relaxation time.