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Title

Evaluation of performance in some ultrasonic procedures for non-invasive thermal estimation into hyperthermia phantoms

AuthorsBazán, I.; Ramos, Antonio; Vázquez Valero, Manuela; Vera, Arturo; Leija, Lorenzo
KeywordsHyperthermia
Temperature measurement
Non-invasive procedures
Ultrasonic techniques
tissue characterization
Echoes
Issue DateJul-2008
PublisherSociété française d'acoustique
Acoustical Society of America
European Acoustics Association
CitationAcoustics '08 Paris Proceedings (p. 2609-2614). Biomedical Ultrasound / Bioresponse to Vibration (BB) ; Session: BB06 - Quantitative Ultrasound Methods for Diagnosis and Therapy [Poster session]
SeriesACOUSTICS2008/2843
AbstractTo dispose of a precise and non-invasive temperature measurement over the treated area becomes very important during hyperthermia treatments, in order to make possible an optimization of their healing effects. A performance analysis of some previously reported ultrasonic techniques, which were proposed for non-invasive temperature estimation, is made in this work over phantoms mimicking human tissues. A first technique is based on discrete scattering modeling for tissue characterization and spectral analysis of frequency distributions related to average scatters spacing [R. Seip & E.S. Ebbini]. Other technique uses certain relations between tissue temperature changes and time-shifts in echoes due to thermally induced sound velocity changes and expansions [R. Maass-Moreno & C.A. Damianou]. And finally, the third procedure analyzed here, is a recently proposed alternative, based on phase demodulation processing, to estimate the indirect effects of echoes time-shifts in the phase domain [M. Vázquez, A. Ramos, et al.]. The three options are analyzed for the same simulated & measured multi-pulse echo patterns, looking for detecting possible advantages and inconveniences in each case. Finally, some improvement paths over the basic estimation methods are also explored.
Description6 pages, 6 figures.-- Communication presented at: Acoustics '08 (Paris, France, June 29-July 4, 2008), comprising: 5th Forum Acusticum, 155th ASA Meeting, 9e Congrès Français d'Acoustique, 7th European Conference on Noise Control (Euronoise), 9th European Conference on Underwater Acoustics (ECUA).-- Book of abstracts published in Vol. 94 Suppl.1: S1-S1020 (May/June 2008) of Acta Acustica united with Acustica: The Journal of the European Acoustics Association (ISSN 1610-1928).
URIhttp://hdl.handle.net/10261/8170
ISBN978-2-9521105-4-9
Appears in Collections:(IAA) Comunicaciones congresos
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