<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1815-5928</journal-id>
<journal-title><![CDATA[Ingeniería Electrónica, Automática y Comunicaciones]]></journal-title>
<abbrev-journal-title><![CDATA[EAC]]></abbrev-journal-title>
<issn>1815-5928</issn>
<publisher>
<publisher-name><![CDATA[Universidad Tecnológica de La Habana José Antonio Echeverría, Cujae]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1815-59282020000100044</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Dependencia térmica de las propiedades eléctricas del tejido pulmonar a frecuencias entre 10 Hz y 100 kHz.]]></article-title>
<article-title xml:lang="en"><![CDATA[Thermal dependence of the electrical properties of lung tissue at frequencies between 10 Hz and 100 kHz.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vázquez Somoza]]></surname>
<given-names><![CDATA[Roberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gilart González]]></surname>
<given-names><![CDATA[Fidel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gonzáles Couso]]></surname>
<given-names><![CDATA[Ramón]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Oriente Centro Nacional de Electromagnetismo Aplicado ]]></institution>
<addr-line><![CDATA[ Santiago de Cuba]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital General &#8220;Juan Bruno Zayas&#8221;  ]]></institution>
<addr-line><![CDATA[ Santiago de Cuba]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2020</year>
</pub-date>
<volume>41</volume>
<numero>1</numero>
<fpage>44</fpage>
<lpage>59</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S1815-59282020000100044&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S1815-59282020000100044&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S1815-59282020000100044&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Uno de los principales retos en el estudio de la interacción de los campos electromagnéticos con los tejidos biológicos es el conocimiento preciso de los parámetros eléctricos (permitividad y conductividad eléctrica) y térmicos (velocidad de transferencia de calor, conductividad térmica, velocidad de producción de calor y densidad de masa), los cuales determinan las formas en que los flujos de corriente y la deposición de calor tienen lugar y por lo tanto representan datos de entrada cruciales para el modelado y la simulación de los campos electromagnéticos y su efecto térmico en los tejidos. En este trabajo se presentan por primera vez los resultados de la caracterización de la dependencia térmica de las propiedades eléctricas del tejido pulmonar porcino durante el calentamiento de este in vitro desde 37 hasta 70 ºC a una velocidad de 5 ºC/min en el intervalo de frecuencias desde 10 Hz hasta 100 kHz. Para esto se construyó y validó una instalación experimental basada en un amplificador Lock-in, acoplada a una computadora, y se desarrollaron los programas de adquisición y procesamiento de los datos correspondientes. Se observó que hasta una temperatura de cerca de 50 ºC la conductividad del tejido aumenta linealmente con la temperatura para todas las frecuencias con una velocidad media de 1.810 %/ºC, mientras que la permitividad disminuye con una velocidad media de -0.563 %/ºC a las frecuencias por encima de 100 Hz y aumenta con una velocidad media de 6.100 %/ºC a las frecuencias por debajo de 1 kHz.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT One of the main challenges in the study of the interaction of electromagnetic fields with biological tissues is the precise knowledge of the electric (permittivity and electrical conductivity) and thermal (rate of heat transfer, thermal conductivity, heat production rate, and mass density) parameters of these. They determine the ways in which current flows and heat depositions takes place and thus represent crucial input data for the modeling and simulation of electromagnetic fields and its thermal effect on tissues. In this work they are presented for the first time the results of the characterization of the thermal dependence of the electric parameters of the porcine lung tissue during its heating in vitro from 37 to 70 ºC with a heating rate of 5 ºC/min in the frequency range from 10 Hz to 100 kHz. For this, it was built and validated an experimental setup based on a Lock-in amplifier, coupled to a computer, and they were developed the corresponding data acquisition and processing software. It was observed that up to a temperature of about 50 ºC the conductivity of the tissue increases linearly with the temperature for all the frequencies with an average rate of 1.810 %/ºC, while the permittivity decreases with an average rate of -0.563 %/ºC, at frequencies above 100 Hz, and increases with an average rate of 6.100 %/ºC, at frequencies below 1 kHz.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[parámetros eléctricos]]></kwd>
<kwd lng="es"><![CDATA[bioimpedancia eléctrica]]></kwd>
<kwd lng="es"><![CDATA[calentamiento de tejidos biológicos]]></kwd>
<kwd lng="es"><![CDATA[tejido pulmonar porcino]]></kwd>
<kwd lng="en"><![CDATA[electric parameters]]></kwd>
<kwd lng="en"><![CDATA[electrical bioimpedance]]></kwd>
<kwd lng="en"><![CDATA[biological tissue heating]]></kwd>
<kwd lng="en"><![CDATA[porcine lung tissue]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="book">
<collab>Dirección Nacional de Registros Médicos y Estadísticas de Salud</collab>
<source><![CDATA[Anuario Estadístico de Salud 2017]]></source>
<year>2018</year>
<page-range>65</page-range><publisher-loc><![CDATA[República de Cuba ]]></publisher-loc>
<publisher-name><![CDATA[Ministerio de Salud Pública]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Trujillo]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Berjano]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Review of the mathematical functions used to model the temperature dependence of electrical and thermal conductivities of biological tissue in radiofrequency ablation]]></article-title>
<source><![CDATA[International Journal of Hyperthermia]]></source>
<year>2013</year>
<volume>29</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>590-7</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rossmann]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Haemmerich]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Review of temperature dependence of thermal properties, dielectric properties, and perfusion of biological tissues at hyperthermic and ablation temperatures]]></article-title>
<source><![CDATA[Critical Reviews&#8482; in Biomedical Engineering]]></source>
<year>2014</year>
<volume>42</volume>
<numero>6</numero>
<issue>6</issue>
</nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tang]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Unlocking potentials of microwaves for food safety and quality]]></article-title>
<source><![CDATA[Journal of food science]]></source>
<year>2015</year>
<volume>80</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>E1776-E93</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Van der Sman]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Model for electrical conductivity of muscle meat during Ohmic heating]]></article-title>
<source><![CDATA[Journal of Food Engineering]]></source>
<year>2017</year>
<volume>208</volume>
<page-range>37-47</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Roth]]></surname>
<given-names><![CDATA[CJ]]></given-names>
</name>
<name>
<surname><![CDATA[Yoshihara]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Ismail]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Wall]]></surname>
<given-names><![CDATA[WA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Computational modelling of the respiratory system: discussion of coupled modelling approaches and two recent extensions]]></article-title>
<source><![CDATA[Computer Methods in Applied Mechanics and Engineering]]></source>
<year>2017</year>
<volume>314</volume>
<page-range>473-93</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[J-R]]></given-names>
</name>
<name>
<surname><![CDATA[Sun]]></surname>
<given-names><![CDATA[B-Y]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[H-X]]></given-names>
</name>
<name>
<surname><![CDATA[Pang]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Xu]]></surname>
<given-names><![CDATA[X]]></given-names>
</name>
<name>
<surname><![CDATA[Sun]]></surname>
<given-names><![CDATA[Q]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Experimental study of dielectric properties of human lung tissue in vitro]]></article-title>
<source><![CDATA[Journal of Medical and Biological Engineering]]></source>
<year>2014</year>
<volume>34</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>598-604</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rigaud]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Morucci]]></surname>
<given-names><![CDATA[J-P]]></given-names>
</name>
<name>
<surname><![CDATA[Chauveau]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Bioelectrical impedance techniques in medicine part I: bioimpedance measurement second section: impedance spectrometry]]></article-title>
<source><![CDATA[Critical Reviews&#8482; in Biomedical Engineering]]></source>
<year>1996</year>
<volume>24</volume>
<page-range>4-6</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gabriel]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Peyman]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Grant]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Electrical conductivity of tissue at frequencies below 1 MHz]]></article-title>
<source><![CDATA[Physics in medicine &amp; biology]]></source>
<year>2009</year>
<volume>54</volume>
<numero>16</numero>
<issue>16</issue>
<page-range>4863</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Peyman]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Gabriel]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Grant]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Complex permittivity of sodium chloride solutions at microwave frequencies]]></article-title>
<source><![CDATA[Bioelectromagnetics]]></source>
<year>2007</year>
<volume>28</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>264-74</page-range></nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Arrhenius]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[On the reaction velocity of the inversion of cane sugar by acids]]></article-title>
<source><![CDATA[Zeitschrift fur physikalische Chemie]]></source>
<year>1889</year>
<volume>4</volume>
<page-range>226ff</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Diller]]></surname>
<given-names><![CDATA[KR]]></given-names>
</name>
<name>
<surname><![CDATA[Pearce]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Issues in modeling thermal alterations in tissues a]]></article-title>
<source><![CDATA[Annals of the NEW YORK Academy of Sciences]]></source>
<year>1999</year>
<volume>888</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>153-64</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Macchi]]></surname>
<given-names><![CDATA[EG]]></given-names>
</name>
<name>
<surname><![CDATA[Gallati]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Braschi]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Persi]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Dielectric properties of RF heated ex vivo porcine liver tissue at 480 kHz: measurements and simulations]]></article-title>
<source><![CDATA[Journal of Physics D: Applied Physics]]></source>
<year>2014</year>
<volume>47</volume>
<numero>48</numero>
<issue>48</issue>
<page-range>485401</page-range></nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Haemmerich]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Ozkan]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Tsai]]></surname>
<given-names><![CDATA[JZ]]></given-names>
</name>
<name>
<surname><![CDATA[Staelin]]></surname>
<given-names><![CDATA[ST]]></given-names>
</name>
<name>
<surname><![CDATA[Tungjitkusolmun]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Mahvi]]></surname>
<given-names><![CDATA[DM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Changes of electrical resistivity of swine liver after occlusion and postmortem]]></article-title>
<source><![CDATA[Medical &amp; Biological Engineering &amp; Computing]]></source>
<year>2002</year>
<volume>40</volume>
<page-range>29-33</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gabriel]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Lau]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Gabriel]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The dielectric properties of biological tissues: III. Parametric models for the dielectric spectrum of tissues]]></article-title>
<source><![CDATA[Physics in medicine &amp; biology]]></source>
<year>1996</year>
<volume>41</volume>
<numero>11</numero>
<issue>11</issue>
<page-range>2271</page-range></nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="">
<collab>IFAC</collab>
<source><![CDATA[An Internet resource for the calculation of the dielectric properties of body tissues in the frequency range10 Hz-100 GHz,1997-2013]]></source>
<year></year>
</nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yero]]></surname>
<given-names><![CDATA[DD]]></given-names>
</name>
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[FG]]></given-names>
</name>
<name>
<surname><![CDATA[Van Troyen]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Vandenbosch]]></surname>
<given-names><![CDATA[GA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Dielectric Properties ofEx VivoPorcine Liver Tissue Characterized at Frequencies Between 5 and 500 kHz When Heated at Different Rates]]></article-title>
<source><![CDATA[IEEE Transactions on Biomedical Engineering]]></source>
<year>2018</year>
<volume>65</volume>
<numero>11</numero>
<issue>11</issue>
<page-range>2560-8</page-range></nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Deás Yero]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Gilart González]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Van Troyen]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Vandenbosch]]></surname>
<given-names><![CDATA[GA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Modelación de la ablación térmica por RF teniendo en cuenta la dependencia de las propiedades del tejido con la temperatura]]></article-title>
<source><![CDATA[Ingeniería Electrónica, Automática y Comunicaciones]]></source>
<year>2019</year>
<volume>40</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>81-95</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Presman]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<source><![CDATA[Electromagnetic fields and life: Springer Science &amp; Business Media]]></source>
<year>2013</year>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
