Ultrasonic heating with waveguide interstitial applicator array

Ultrasound interstitial applicators can be used for heating tumors near air and bone interfaces where use of non-invasive ultrasound methods becomes difficult. We describe in this paper an ultrasonic waveguide three-applicator array for interstitial waveguide three-applicator array for interstitial...

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Bibliographic Details
Published inIEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings Vol. 2; pp. 1344 - 1347 vol.2
Main Author Jarosz, B.J.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1997
Subjects
Applicators
Bones
Brain modeling
Equations
Heating
Medical treatment
Neoplasms
Temperature measurement
Thermal conductivity
Ultrasonic imaging
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Summary:Ultrasound interstitial applicators can be used for heating tumors near air and bone interfaces where use of non-invasive ultrasound methods becomes difficult. We describe in this paper an ultrasonic waveguide three-applicator array for interstitial waveguide three-applicator array for interstitial thermotherapy. We first discuss the temperature distribution and the pattern of heat deposition using the effective thermal conductivity equation. This equation is used then for finite element analysis of temperature modelling. We discuss heating in porcine brain tissue and present results with the array in a large volume tissue phantom. We compare the simulation results with the experiment. The average difference between measured and simulation temperatures was <0.4/spl deg/C. Finally, we show that the arrays can be useful for thermotherapy if thermal conductivity of the medium is lowered or if modified, more powerful applicators are used.
ISBN:9780780337473
0780337476
ISSN:1091-5281
DOI:10.1109/IMTC.1997.612417