MULTI FOCI SONICATIONS FOR HYPERTHERMIA TREATMENTS USING MAGNETIC RESONANCE GUIDED FOCUSSED ULTRASOUND.

摘要

A mild hyperthermia treatment apparatus (10) includes an imager (12) which generates a planning image (34) and temperature maps (36) of a target region. An array of ultrasonic transducer drivers (52) individually drives ultrasonic transducers of a phase d array of ultrasonic transducers (50). One or more processors or units receive a target temperature profile and calculate power frequency and relative phase for the transducer drivers to drive the phased array of ultrasonic transducers to generate a multi foci sonica tion pattern configured to heat the target region with the target temperature profile while limiting peak acoustic pressures. During treatment the imager generates a series of temperature maps which the one or more processors or units compare with the target temperature p rofile and based on the comparison adjust the power frequency and relative phase with which the transducer drivers drive the ultrasonic transducers.