In medical literature there is still a controversary discussion about the ideal imaging modality in liver surgery. Here, different angles of view encounter the same problem (surgical/radiological view) both availability of methods (CT/MRI) and their costs. For the advancement of the always more complex and interdisciplinary stamped treatment strategies of colorectal liver metastases it is vital to use a reliable imaging method and respectively for a high significance a combination of methods. The intraoperative contrast media sonography promises a significant benefit in the detection of leasions which have not been detected so far. In the future patients may benefit a lot from it and thus get a better prognosis. The up to now existing data are not sufficient. Therefore, from our point of view, it is very important to consider the comparative consideration of all modalities.