Hypothesis: Use of contrast ultrasound showed interesting results, which can increase ultrasonography sensitivity performed during surgery in the evaluation of operable liver metastases.~This study is a two-stage phase II multicenter study (Simon's two-stage).
Hypothesis: Use of contrast ultrasound showed interesting results, which can increase ultrasonography sensitivity performed during surgery in the evaluation of operable liver metastases.~This study is a two-stage phase II multicenter study (Simon's two-stage).