PERFORMANCE CHARACTERISTICS OF 'HELIOS', A THIRTY-BEAM ULTRASOUND DEVICE FOR DEEP-TUMOR HYPERTHERMIA.

G. H. Nussbaum*, E. Seppi, E. Shapiro, V. Sathiaseelan, W. Straube, B. Emami

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Measurements of temperature-time profiles in an agar-graphite gell 'miniphantom' stepped horizontally through a larger phantom of degassed water have yielded distributions of initial rates of heating in the focal plane of Helios, a four-ring, 30-transducer ultrasound device designed for localized deep heating. Focal-plane heating patterns (initial degree C/min distributions) produced by the innermost of the four transducer rings operated under a variety of conditions are presented. The results suggest that at a depth of 10 cm in homogeneous muscle, heating patterns as narrow as 1. 8 cm (full width half maximum) with initial peak heating rates of more than 5 degree C/min can be anticipated. These studies also illustrate the potential for clinically relevant manipulation of lateral heating patterns through redistribution of power to transducers in a given ring.

Original languageEnglish (US)
Title of host publicationIEEE/Engineering in Medicine and Biology Society Annual Conference
PublisherIEEE
Pages1441-1443
Number of pages3
StatePublished - Dec 1 1986

ASJC Scopus subject areas

  • Engineering(all)

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