Title :
Ultrasonic computed tomography used in non-invasive temperature measuring
Author :
Yang, Yi Hong ; Wang, Hong Zhang
Author_Institution :
Dept. of Precision Instrum., Shanghai Jiao Tong Univ., China
Abstract :
Ultrasonic computed tomography (UCT) is used for noninvasive temperature measurement in hyperthermia in human body. A model for temperature measurement has been established, and an UCT algorithm for the model has been developed. The authors also analyze the resolution and the time requirements of the measurement, and a method of sparse reconstruction to measure the distribution of sound speed and the temperature is proposed. The method of ultrasonic diffraction reconstruction and the fast convolution-backpropagation algorithm are used for image reconstruction. A new approach to diffraction reconstruction from limited data is proposed. The error of the temperature measurement is less than 0.25 degrees C and the reconstruction time less than 12 s for one image using a microcomputer.<>
Keywords :
biomedical ultrasonics; biothermics; computerised tomography; temperature measurement; convolution-backpropagation algorithm; hyperthermia; medical diagnostic imaging; noninvasive temperature measurement; reconstruction time; sound speed distribution; sparse reconstruction method; ultrasonic computed tomography; ultrasonic diffraction reconstruction;
Conference_Titel :
Engineering in Medicine and Biology Society, 1988. Proceedings of the Annual International Conference of the IEEE
Conference_Location :
New Orleans, LA, USA
Print_ISBN :
0-7803-0785-2
DOI :
10.1109/IEMBS.1988.94617
