Patent ID: 8216161
Filing Date: 2012-07-10
Classification: A61B,A61N

Abstract:
1. A method of adjusting an energy of a high intensity focused ultrasound (HIFU) signal delivered by a HIFU transducer, comprising: transmitting a HIFU signal having a fundamental frequency to a target volume; receiving ultrasound echo signals from one or more positions; determining an energy of the echo signals in a first frequency range and an energy of the echo signals in a second frequency range; comparing the energy of the echo signals in the first frequency range and the energy of the echo signals in the second frequency range by determining a ratio of a power of the echo signals in the first frequency range to a power of the echo signals in the second frequency range; and based on the comparison, adjusting one or more characteristics of the HIFU signal to adjust the energy of the HIFU signal delivered by the HIFU transducer.