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Hypovascular liver metastases visualized with US and CEUS. The same hypovascular liver metastasis is visualized by US and CEUS in both the arterial and portal phases. In the arterial phase a slight rim enhancement is seen (arrows). The non-enhancing area in the center represents a necrosis, and is demonstrated in both the arterial and late phases. A: B-mode US; B: Arterial phase; C: Late phase.
