Affiliation: | 1. Biomedical Engineer, Herlev, Denmark;2. Sidney Farber Cancer Institute and Peter Bent Brigham Hospital, Herlev, Denmark;3. Supported in part by Fogarty International Research Fellowship. Ultrasonic laboratory and Electromedical department, Herlev Hospital, DK-2730 Herlev, Denmark;4. Medical Engineer, Herlev, Denmark |