<?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>0379-3982</journal-id>
<journal-title><![CDATA[Revista Tecnología en Marcha]]></journal-title>
<abbrev-journal-title><![CDATA[Tecnología en Marcha]]></abbrev-journal-title>
<issn>0379-3982</issn>
<publisher>
<publisher-name><![CDATA[Instituto Tecnológico de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0379-39822023000300115</article-id>
<article-id pub-id-type="doi">10.18845/tm.v36i3.6137</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Simulación Monte Carlo de un haz de radiación de una fuente de cobalto 60 en condiciones de referencia]]></article-title>
<article-title xml:lang="en"><![CDATA[Monte Carlo simulation of radiation beam of cobalt 60 source in reference conditions]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vargas-Segura]]></surname>
<given-names><![CDATA[Walter]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cordero-Ramírez]]></surname>
<given-names><![CDATA[Anthony]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Tecnológico de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>36</volume>
<numero>3</numero>
<fpage>115</fpage>
<lpage>126</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0379-39822023000300115&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0379-39822023000300115&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0379-39822023000300115&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El propósito de este estudio es generar la simulación y validación de un haz de cobalto 60 de un equipo de radioterapia en condiciones de referencia, mediante el uso de parámetros de evaluación correspondientes a sistemas de planificación comerciales. Para esto, se utilizaron datos de perfiles de dosis y de porcentaje de dosis en profundidad (PDD) para un tamaño de campo de 10 cm x 10 cm a una distancia fuente superficie (DFS) de 80 cm del maniquí de agua. El programa utilizado para la simulación fue el Geant4, incorporando el haz de radiación, un sistema de colimación y el maniquí. Al comparar los resultados de la simulación con los datos medidos, se obtuvo una diferencia de 3.50 % en la región definida entre el máximo de dosis y el 50 % en la curva de PDD, así como una desviación máxima de 0.96 mm en la zona de acumulación del PDD, además de una desviación de 1.42 mm en la zona de penumbra para el perfil dosis. Para la zona fuera del eje central en el perfil de dosis y en la zona de bajas dosis fueron del 2.41 % y del 2.56 %, respectivamente. Por los resultados obtenidos, se realizó la validación de las condiciones simuladas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The purpose of this study is to generate the simulation and validation of a cobalt 60 beam of a radiotherapy equipment under reference conditions, using evaluation parameters corresponding to commercial planning systems. For this, we used dose profile and percentage depth dose (PDD) data for a field size of 10 cm x 10 cm at a surface source distance (DFS) of 80 cm from the water phantom. The program used to simulate the radiation beam was Geant4, including a collimation system and the phantom. When comparing the simulation results with the measured data, a difference of 3.50 % was obtained in the region defined between the maximum dose and 50 % in the PDD curve, as well as a maximum deviation of 0.96 mm in buildup region in the PDD. In addition, there is a deviation of 1.42 mm in the penumbra region for the dose profile. For the zone outside the central axis in the dose profile and in the zone of low doses, they were 2.41 % and 2.56 %, respectively. Based on the results obtained, this paper validates the simulated conditions.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Simulación Monte Carlo]]></kwd>
<kwd lng="es"><![CDATA[Geant4]]></kwd>
<kwd lng="es"><![CDATA[validación]]></kwd>
<kwd lng="es"><![CDATA[Cobalto 60]]></kwd>
<kwd lng="es"><![CDATA[porcentaje de dosis en profundidad]]></kwd>
<kwd lng="es"><![CDATA[perfil de dosis]]></kwd>
<kwd lng="es"><![CDATA[radioterapia]]></kwd>
<kwd lng="en"><![CDATA[Monte Carlo Simulation]]></kwd>
<kwd lng="en"><![CDATA[Geant4]]></kwd>
<kwd lng="en"><![CDATA[validation]]></kwd>
<kwd lng="en"><![CDATA[Cobalt 60]]></kwd>
<kwd lng="en"><![CDATA[percentage depth dose]]></kwd>
<kwd lng="en"><![CDATA[perfil dose]]></kwd>
<kwd lng="en"><![CDATA[radiotherapy]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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