Abstract
The use of high-intensity focused ultrasound for cancer therapy and tissue ablation has been receiving increased attention recently. Feedback for these treatments has been limited to invasive fine-wire thermocouple arrays. These are impractical in many clinical situations. For this purpose, a new non-invasive feedback method for ultrasound thermotherapy has been developed which is based on the estimation of a fundamental frequency f1. The value of f1 is a function of the average scatterer spacing and the local value of the speed of sound in the tissue, both of which are functions of temperature. It is computed from an A-line which is acquired using pulse-echo diagnostic ultrasound imaging the tissue zone being heated. Experimental results demonstrating quantitative, non-invasive temperature change measurements caused by a 192-element ultrasound phased array, as well as the underlying mathematical model, are shown.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 663-664 |
| Number of pages | 2 |
| Journal | Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings |
| Volume | 17 |
| Issue number | 1 |
| State | Published - Dec 1 1995 |
