Доступ предоставлен для: Guest
Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Telecommunications and Radio Engineering
SJR: 0.202 SNIP: 0.2 CiteScore™: 0.23

ISSN Печать: 0040-2508
ISSN Онлайн: 1943-6009

Выпуски:
Том 78, 2019 Том 77, 2018 Том 76, 2017 Том 75, 2016 Том 74, 2015 Том 73, 2014 Том 72, 2013 Том 71, 2012 Том 70, 2011 Том 69, 2010 Том 68, 2009 Том 67, 2008 Том 66, 2007 Том 65, 2006 Том 64, 2005 Том 63, 2005 Том 62, 2004 Том 61, 2004 Том 60, 2003 Том 59, 2003 Том 58, 2002 Том 57, 2002 Том 56, 2001 Том 55, 2001 Том 54, 2000 Том 53, 1999 Том 52, 1998 Том 51, 1997

Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v72.i15.80
pages 1439-1452

PHYSICAL BASIC OF BUILDING ACTIVE ACOUSTO-THERMOMETERS

O. V. Sytnik
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine
S. A. Masalov
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkov 61085, Ukraine
A. I. Logvinenko
A. Usikov Institute of Radio Physics and Electronics; A.I. Kalmykov's Center of Earth radiophysic sounding, National Academy of Sciences and National Space Agency of Ukraine, 12, Ak. Proskury Str., Kharkiv, 61085, Ukraine
G. I. Klochko
A. Usikov Institute of Radio Physics and Electronics; A.I. Kalmykov's Center of Earth radiophysic sounding, National Academy of Sciences and National Space Agency of Ukraine, 12, Ak. Proskury Str., Kharkiv, 61085, Ukraine

Краткое описание

The present paper discusses the problem of detecting and identifying the heat transfer processes in living tissues using a noninvasive ultrasound technique. An optimal method, which is optimal in terms of maximum of likelihood, is proposed to detect the temperature variations within an internal layers of the living tissue when the latter is locally heated. An algorithm for estimating the spatial distribution of temperature gradients is based upon the measurement of the phase difference of ultra-sound low-power signals reflected from the inhomogeneities of tissues as well as upon the calculations of temperature increment in terms of estimated variations in delays of a received signal. The properties of signals returned from different tissues are examined. The ultrasound velocity for different temperatures and the salt composition of a specimen under study is estimated. The key factors affecting the magnitude of a meter error are studied. The arrangement of a device designed to investigate the heat transfer processes in living tissues is developed. A digital part of the device consists of phase and amplitude channels. The phase channel is used to make estimates of temperature gradients, whereas the amplitude channel serves as an auxiliary means of searching localized inhomogeneities and determining their spatial characteristics. Results of the algorithm simulation are given. The specific features of its performance in real interference situation are discussed.


Articles with similar content:

An Ultrasonic Method for Heat Process Investigation in Living Tissues
Telecommunications and Radio Engineering, Vol.64, 2005, issue 7-12
A. I. Logvinenko, G. I. Klochko, O. V. Sytnik
A MATHEMATICAL MODEL FOR CONTROLLING A TELECOMMUNICATION NETWORK AND MODELS FOR CONTROLLING THE TECHNICAL STATE AND DIAGNOSING ITS ELEMENTS
Telecommunications and Radio Engineering, Vol.70, 2011, issue 20
D. A. Lopatin, R. N. Shulgin, A. N. Zbinyakov, I. P. Maksaev, V. A. Lyubimov
Evaluation of Capacity Losses of Broadband Wireless Access Systems in Conditions of Interference Impact
Telecommunications and Radio Engineering, Vol.68, 2009, issue 13
M. A. Sivov, A. Yu. Sivov, A. V. Korolev, M. G. Aleshin
The Peculiarities of Using a Quasi-Continuous Sounding Radio Signals in Radioacoustical Systems
Telecommunications and Radio Engineering, Vol.53, 1999, issue 7-8
I. B. Nagibin, V. M. Kartashov, V. I. Aloykhin
Guaranteed Estimate of the Features Utility while Statistical Recognition of Two Classes
Journal of Automation and Information Sciences, Vol.42, 2010, issue 10
Leonid S. Fainzilberg