Non-invasive detection of thermal effects due to highly focused ultrasonic fields

Ralf Seip, Emad S. Ebbini, Matthew O'Donnell, Charles A. Cain

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

10 Scopus citations

Abstract

A non-invasive technique for the localization and evaluation of thermal effects in tissue due to focused high intensity ultrasound beams is described in this paper. A combined therapy/imaging transducer assembly is used to deliver a specific dose (ultrasound time-intensity product) to a tissue sample and to gather A-mode data as a function of time. In-vitro experiments performed on calf liver and in-vivo experiments performed on rat brains and liver have shown the following: 1. Reflection coefficients calculated based on a low-order autoregressive (AR) tissue model assumption and signal entropy follow the temperature rise at the heating point; 2. Heated region size and position can be monitored with high accuracy. Such information could be used effectively for feedback purposes during a rapid heating hyperthermia or ultrasound surgery procedure.

Original languageEnglish (US)
Title of host publicationProceedings of the IEEE Ultrasonics Symposium
PublisherPubl by IEEE
Pages1229-1232
Number of pages4
ISBN (Print)0780312783
StatePublished - Dec 1 1993
EventProceedings of the IEEE 1993 Ultrasonics Symposium - Baltimore, MD, USA
Duration: Oct 31 1993Nov 3 1993

Publication series

NameProceedings of the IEEE Ultrasonics Symposium
Volume2
ISSN (Print)1051-0117

Other

OtherProceedings of the IEEE 1993 Ultrasonics Symposium
CityBaltimore, MD, USA
Period10/31/9311/3/93

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  • Cite this

    Seip, R., Ebbini, E. S., O'Donnell, M., & Cain, C. A. (1993). Non-invasive detection of thermal effects due to highly focused ultrasonic fields. In Proceedings of the IEEE Ultrasonics Symposium (pp. 1229-1232). (Proceedings of the IEEE Ultrasonics Symposium; Vol. 2). Publ by IEEE.