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Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN Печать: 2152-5102
ISSN Онлайн: 2152-5110

Выпуски:
Том 46, 2019 Том 45, 2018 Том 44, 2017 Том 43, 2016 Том 42, 2015 Том 41, 2014 Том 40, 2013 Том 39, 2012 Том 38, 2011 Том 37, 2010 Том 36, 2009 Том 35, 2008 Том 34, 2007 Том 33, 2006 Том 32, 2005 Том 31, 2004 Том 30, 2003 Том 29, 2002 Том 28, 2001 Том 27, 2000 Том 26, 1999 Том 25, 1998 Том 24, 1997 Том 23, 1996 Том 22, 1995

International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.2019025020
Forthcoming Article

Tissue blood perfusion inverse analysis: temperature vs. heat flux approach

Jurij Iljaz
University of Maribor, Faculty of mechanical engineering
Leopold Škerget
University of Maribor, Fculty of mechanical engineeirng
Jure Marn
University of Maribor, Fculty of mechanical engineeirng

Краткое описание

The goal of this study is prediction of blood perfusion through non-homogeneous tissue based on available data of either skin temperature (Dirichlet) or heat flux (Neumann) boundary conditions, and predicting the other. A method proposed for comparing both approaches by solving inverse bio-heat problems is Boundary Element Method employing Levenberg-Marquardt optimization combined with first-order Tikhonov regularization process and L-curve method to determine the optimal value of regularization parameter. Both of proposed approaches, Dirichlet and Neumann, have advantages and disadvantages. Our hypothesis was tested by comparing solutions to existing available results as well as to own results considering different measurement noise levels. Greatest difference between both approaches proposed is the case of low measurement noise where latter gives better agreement with data, especially for deep tissue region. The limitation of proposed method was found to be in the case of high measurement noise where solution was comparable to available measured data in the region close to the boundary. This work should contribute to better understanding of diagnostics of blood perfusion taking advantage of fast measurements of skin temperature and heat flux to determine blood perfusion.