Simulation Study and Experiment for Noninvasive Measurement of Temperature Distribution in Excised Tissues by Ultrasonic CT

Abstract

The purpose of this study is to develop a noninvasive method to measure temperature distribution in tissues by using ultrasonic CT system. Comparison of CT algorisms, simulation of CT reconstruction and the experiment for tissue made of two agars were performed, following results were obtained. (1) Shepp-Logan filtered convolution method and AART are recommended as the effective CT algorisms for Ultrasonic CT. (2) Tissue has an optimum size for the distance between ultrasonic transmitter and receiver. (3) Temperature distribution reconstructed from measured arrival time of ultrasonic wave was distributed within the range of those measured directly, though the discontinuity of temperature was shown at a border of mediums.