Patent ID: 7955263

Claim:
A positioning method for the focus location of a high-intensity focused ultrasound (HIFU) device in vivo, comprising steps of: (i) scanning and estimating the location and size of a tumor in vivo using a diagnostic ultrasound device; (ii) operating the HIFU device at a relatively low power to align the ultrasound provided thereby with the location of the tumor tissue detected in step (i); (iii) adjusting the scanning angle of the diagnostic ultrasound device until maximal interference convergence is observed on the ultrasounds intersection provided respectively from the diagnostic ultrasound device and the HIFU device, wherein the inclining angle defined between geometric axes of the respective probes of the diagnostic ultrasound device and the HIFU device has a range from 85 to 160 degrees; and (iv) determining the focus of the HIFU device by locating where the maximal interference convergence is observed using the diagnostic ultrasound device.