Training Site: Department of Radiology, University of California, San Diego
Mentor: William Bradley, Jr., M.D., Ph.D.
Fellowship Period: July – December 2009
My major clinical and research interests are in the field of therapeutic ultrasound applications in the human brain. My current main research focus is transcranial sonothrombolysis in stroke. Since July 2008, I have worked with an ExAblate 4000 headsystem on mechanical sonothrombolysis using high intensity focused ultrasound. Since then, 500 in vitro experiments have been accomplished, two different flow models have been developed, and an in vivo model (rabbit carotid artery) is currently being evaluated. First feasibility studies in two animals were successful. Besides HIFU, other research interests are in different sonothrombolysis approaches, such as transcranial sonothrombolysis using diagnostic ultrasound and prehospital sonothrombolysis in the emergency vehicles and helicopters. Further recent or current research activities are in the field of local drug delivery using acoustically active drug carrier systems, treatment of neurodegenerative diseases (mainly Parkinson) using transcranial HIFU, intraoperative neuronavigation using contrast-enhanced ultrasound, gene transfection through sonoporation, effects of primary/secondary radiation force on sonothrombolysis and drug delivery, transcranial sound field characterization, and flow mechanics in intracranial aneurysms and during sonothrombolysis using echo PIV and bubble tracking.
I am a true believer that the technology of MRI-Guided High Intensity Focused Ultrasound has the potential to change future medical treatment fundamentally. The technological potential combined with the biophysical effects of ultrasound are fascinating and have the potential to become a future landmark for various applications. To be a part of this development, to be able to actively contribute to improved stroke, neurodegenerative or tumor treatment in the brain using HIFU is my long-term goal in the field of MRI-guided focused ultrasound surgery.
Progress Reports: 3-month progress report; Final progress report