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Fig. 3A —Tissue characterization by diffusion-weighted images.
Diffusion-weighted MR images in 55-year-old man with liver metastasis obtained
at different b values show large heterogeneous metastasis within right lobe of
liver. Necrotic center of metastasis (squares) shows attenuation of
signal intensity with increasing b values, indicating less restricted
diffusion. By comparison, rim of tumor (rectangles) is more cellular
and shows little signal attenuation with increasing b value.
