1. Department of Electronic Engineering, Sogang University, Seoul 121-742, South Korea
2. Sogang Institute of Advanced Technology, Sogang University, Seoul 121-742, South Korea
3. Princess Margaret Cancer Centre/University Health Network, Toronto, Ontario M5G 1L7, Canada
4. Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5G 1L7, Canada
5. Center for Ultrasound Molecular Imaging and Therapeutics, Department of Medicine, University of Pittsburgh School of Medicine and Heart and Vascular Institute, University of Pittsburgh Medical Center (UPMC), Pittsburgh, Pennsylvania 15213, USA
6. GE Ultrasound Korea, Seongnam 462-807, South Korea
7. iBULe Photonics, Incheon 406-840, South Korea
8. Department of Radiology, Seoul National University of Bundang Hospital, Kyonggi-do, South Korea
9. Department of Electronic Engineering, Konkuk University, Seoul 143-701, South Korea