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Realistic simulations of aorta radius estimation

Published: 26 October 2011 Publication History

Abstract

This paper studies estimation of the dynamic aorta radius in a realistic geometry where radius variation is used as an indirect measure of central blood pressure.
Four different radius estimation approaches were studied where their performance in terms of precision and sensitivity was compared. As a basis for estimation simulations, finite-difference, time-domain electromagnetic simulations of a realistic human model have been performed.
Radius estimation should be based on identifying the front and rear reflections from the aorta, however the temporal sensitivity of the front reflection from the aorta is weak and non-linear; therefore robustness of radius estimates is compromised. Nonetheless, this does not preclude using the sensitivity of the rear reflections as a proxy of aorta diameter variation combined with Moens-Korteweg's relationship to perform estimations of mean pressure.
Proxies of radial changes are observable and for a precision of around 0.1 mm, the results show that an emitted energy to receiver noise spectral density ratio between 110 dB and 130 dB should be sufficient, depending on the estimator.

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Cited By

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  • (2016)Reflection and transmission of ultra-wideband pulses for detection of vascular pressure variation and spatial resolution within soft tissuesBiomedical Physics & Engineering Express10.1088/2057-1976/2/6/0650032:6(065003)Online publication date: 23-Nov-2016
  • (2015)Experimental investigation into radar‐based central blood pressure estimationIET Radar, Sonar & Navigation10.1049/iet-rsn.2014.02069:2(145-153)Online publication date: Feb-2015
  • (2012)Ultrawideband technology in medicineJournal of Electrical and Computer Engineering10.1155/2012/7169732012(1-9)Online publication date: 1-Jan-2012

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    ISABEL '11: Proceedings of the 4th International Symposium on Applied Sciences in Biomedical and Communication Technologies
    October 2011
    949 pages
    ISBN:9781450309134
    DOI:10.1145/2093698
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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    • Technical University of Catalonia Spain: Technical University of Catalonia (UPC), Spain
    • River Publishers: River Publishers
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    Published: 26 October 2011

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    View all
    • (2016)Reflection and transmission of ultra-wideband pulses for detection of vascular pressure variation and spatial resolution within soft tissuesBiomedical Physics & Engineering Express10.1088/2057-1976/2/6/0650032:6(065003)Online publication date: 23-Nov-2016
    • (2015)Experimental investigation into radar‐based central blood pressure estimationIET Radar, Sonar & Navigation10.1049/iet-rsn.2014.02069:2(145-153)Online publication date: Feb-2015
    • (2012)Ultrawideband technology in medicineJournal of Electrical and Computer Engineering10.1155/2012/7169732012(1-9)Online publication date: 1-Jan-2012

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