Title :
Modelling temperature distributions produced by ultrasound phased arrays for hyperthermia
Author :
Lalonde, R.J. ; Worthington, A. ; Hunt, J.W.
Author_Institution :
Dept. of Med. Biophys., Toronto Univ., Ont., Canada
Abstract :
A computer modeling study was undertaken to determine the temperature distributions that could be created in tissue by ultrasound phased arrays for hyperthermia. The field-conjugation method was used to synthesize a focus directly. Temperature inside a modeled tissue phantom was determined to two different treatment protocols. Rapid, high-temperature treatments showed better thermal-dose distributions produced in tissue compared to slower treatment protocols. The possible effect of phase error during propagation through tissue was modeled in a simple manner by adding random phases to the array elements. The addition of phase error produced only slight changes to the intensity and temperature profiles
Keywords :
biomedical ultrasonics; biothermics; digital simulation; physiological models; radiation therapy; temperature distribution; computer modeling; field-conjugation method; hyperthermia; intensity profile; phase error; propagation through tissue; random phases; temperature distribution modelling; thermal dose distribution; treatment protocols; ultrasound phased arrays; Heat treatment; Heating; Hyperthermia; Imaging phantoms; Phased arrays; Protocols; Temperature distribution; Ultrasonic imaging; Ultrasonic transducer arrays; Ultrasonic transducers;
Conference_Titel :
Ultrasonics Symposium, 1989. Proceedings., IEEE 1989
Conference_Location :
Montreal, Que.
DOI :
10.1109/ULTSYM.1989.67127
