A quantitative analysis of a two-dimensional non-invasive real-time temperature-change estimation algorithm based on diagnostic backscattered ultrasound RF-data it presented in this paper. An experimental system consisting of a therapeutic ultrasound unit and an ultrasound imaging unit was used to quantitatively characterize the accuracy, spatial resolution and tipple artifacts of the temperature estimates in a rubber phantom heating experiment. The ripple it shown to be a consequence of the thermo-acoustic lens effect resulting from local changes of the speed of sound in heated regions. Non-invasive temperature estimates were used as inputs to a multipoint ultrasound phased array temperature controller, for a long duration hyperthermia experiment. The applicability of this method to tissue media, as well as its major limitations are discussed.
|Original language||English (US)|
|Number of pages||4|
|Journal||Proceedings of the IEEE Ultrasonics Symposium|
|State||Published - Dec 1 1997|
|Event||Proceedings of the 1997 IEEE Ultrasonics Symposium. Part 1 (of 2) - Toronto, Can|
Duration: Oct 5 1997 → Oct 8 1997