Accession Number : ADA300003

Title :   Development of an Inverse Technique to Estimate the Ultrasound Field During Chest Wall and Breast Hyperthermia.

Descriptive Note : Annual rept. 1 Aug 94-31 Jul 95,

Corporate Author : UTAH UNIV SALT LAKE CITY

Personal Author(s) : Dutton, Andrew W.

PDF Url : ADA300003

Report Date : 28 AUG 1995

Pagination or Media Count : 29

Abstract : A clinical system is being constructed to use inverse techniques to estimate the absorbed power field in the breast and chest wall during ultrasound hyperthermia. The system uses a B-mode ultrasound imager to construct a geometric model based upon each patient's anatomy and to initially measure the ultrasound attenuation coefficient at selected areas within the tissue region. The goal is to provide a tool to accurately estimate the ultrasound field so as to ensure therapeutic heating of the tumor while minimizing patient pain. In the first year of this project, all the clinical ultrasound data acquisition equipment has been built and integrated. Advanced two-dimensional numerical models of the ultrasound field using finite elements and integral equation methods have been developed. Future work will include numerical model verification studies, modification of the clinical thermocouple probes to measure the absorbed power and integration of all the components into the inverse technique.

Descriptors :   *NEOPLASMS, *ESTIMATES, *ULTRASONICS, *HYPERTHERMIA, *CANCER, MATHEMATICAL MODELS, TWO DIMENSIONAL, FINITE ELEMENT ANALYSIS, CLINICAL MEDICINE, GEOMETRIC FORMS, HEATING, INVERSION, ANATOMY, PAIN, PATIENTS, THORAX, INTEGRAL EQUATIONS, THERMOCOUPLES, MAMMARY GLANDS.

Subject Categories : Medicine and Medical Research
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE