Measurement of Temperature Distribution in a Phantom Body by an Ultrasonic CT Method

摘要

An ultrasonic CT method is utilized for measuring indirectly the interior temperature distribution from a series of sound projections, which are taken at several different orientations relative to a phantom body. First, we compared three popular reconstruction algorithms to minimize the number of projections required. Then, a phantom was placed in a water bath, and a series of sound projections of the phantom was measured, both translating and rotating a pair of ultrasonic detectors. We obtained the temperature distribution in the phantom by subtracting the sound speed distribution before heating from that after heating.