Chang-Sheng Mei1,2, Jing Yuan1, Nathan J. McDannold1, Lawrence P. Panych1
1Department of Radiology, Brigham and Womens Hospital, Harvard Medical School, Boston, MA, USA; 2Department of Physics, Boston College, Chestnut Hill, MA, USA
During thermal ablation, the region of heating can be much smaller than the image FOV, resulting in waste of scan time to cover regions away from the heated zone. In addition, temperature estimation is problematic when the PRF method is used in tissues that contain both water and fat. We propose a technique that uses a 2DRF pulse to excite a reduced volume and to suppress fat. Focused ultrasound heating experiments were conducted where the reduced-FOV was selected to contain the focal spot. The observed temporal resolution increased by 2.3 fold without temperature error due to the presence of fat.