<?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>0864-084X</journal-id>
<journal-title><![CDATA[Nucleus]]></journal-title>
<abbrev-journal-title><![CDATA[Nucleus]]></abbrev-journal-title>
<issn>0864-084X</issn>
<publisher>
<publisher-name><![CDATA[CUBAENERGIA]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0864-084X2019000100036</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Design of a preamplifier card for the photomultiplier tubes of a gamma camera]]></article-title>
<article-title xml:lang="es"><![CDATA[Diseño de una tarjeta preamplificadora para los tubos fotomultiplicadores de una cámara gamma]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez Martínez]]></surname>
<given-names><![CDATA[Jorge Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rivero Ramírez]]></surname>
<given-names><![CDATA[Doris del Carmen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Osorio Deliz]]></surname>
<given-names><![CDATA[Juan Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Clínico Quirúrgico &#8216;&#8216;Hermanos Ameijeiras&#8217;&#8217; (HHA)  ]]></institution>
<addr-line><![CDATA[Centro Habana La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Superior de Tecnologías y Ciencias Aplicadas (InSTEC)  ]]></institution>
<addr-line><![CDATA[Plaza de la Revolución La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Nacional de Oncología y Radiobiología (INOR)  ]]></institution>
<addr-line><![CDATA[Plaza de la Revolución La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2019</year>
</pub-date>
<numero>65</numero>
<fpage>36</fpage>
<lpage>41</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0864-084X2019000100036&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0864-084X2019000100036&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0864-084X2019000100036&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The service provided by Gamma Cameras (GC) in Nuclear Medicine departments fails because of their breakdown, generally due to the associated electronics and not to the physical detection components. Therefore, it was decided to develop an electronic system that allows the recovery and optimization of disused GC, starting with the design of the preamplifier for each photomultiplier tube (PMT). The circuit was designed and simulated and the list of components necessary for the construction of the preamplifier was generated, as well as the printed circuit board was designed for its assembly. By simulating the preamplifier, this worked in linear mode. This determines that the amplitude of the output signal is proportional to the amount of charge delivered by the detector. This card allows an automatic adjustment of the signals of the PMTs as modern GC do. Besides, the circuit was designed and simulated for 37 and 75 PMTs, and the printed circuit board was designed for both cases.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El servicio que prestan las Cámaras Gamma (CG) en los departamentos de Medicina Nuclear falla por roturas de las mismas, generalmente debido a la electrónica asociada y no a los componentes físicos de detección. Por tal razón, se decidió desarrollar un sistema electrónico que permita la recuperación y optimización de las CG en desuso, comenzando con el diseño del preamplificador para cada tubo fotomultiplicador (TFM). Se diseñó y simuló el circuito y se generó la lista de componentes necesarios para la construcción del preamplificador, así como se diseñó la placa de circuitos impresos para su montaje. Al simular el preamplificador este trabajó en modo lineal. Esto determina que la amplitud de la señal de salida sea proporcional a la cantidad de carga entregada por el detector. Esta tarjeta permite un ajuste automático de las señales de los TFMs como lo hacen las CG modernas. Además, se diseñó y simuló el circuito para 37 y 75 TFMs, así como se diseñó la placa de circuitos impreso para ambos casos.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[nuclear medicine]]></kwd>
<kwd lng="en"><![CDATA[Cuba]]></kwd>
<kwd lng="en"><![CDATA[gamma cameras]]></kwd>
<kwd lng="en"><![CDATA[photomultipliers]]></kwd>
<kwd lng="en"><![CDATA[amplifiers]]></kwd>
<kwd lng="es"><![CDATA[medicina nuclear]]></kwd>
<kwd lng="es"><![CDATA[Cuba]]></kwd>
<kwd lng="es"><![CDATA[cámaras gamma]]></kwd>
<kwd lng="es"><![CDATA[fotomultiplicadores]]></kwd>
<kwd lng="es"><![CDATA[amplificadores]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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