[Isodense and isoechoic liver metastases]

An important prerequisite in CT and also ultrasonic scanning in order to recognize pathological space-occupying processes in the liver is that these processes can stand out in the pictures with "another colour" than the surrounding liver tissue. CT and ultrasonic scanning are based on very different physical principles and, therefore, different tissue parameters are registered. It is to be anticipated that the contrast conditions between the liver tissue and tumour tissue in the individual patient are not identical in the two imaging processes. The case histories presented illustrate the fact that liver metastases which merge with the liver parenchyma with one of the methods and are, therefore, not recognized, can sometimes be recognized with the other method.