<?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>2444-054X</journal-id>
<journal-title><![CDATA[Cirugía y cirujanos]]></journal-title>
<abbrev-journal-title><![CDATA[Cir. cir.]]></abbrev-journal-title>
<issn>2444-054X</issn>
<publisher>
<publisher-name><![CDATA[Academia Mexicana de Cirugía A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2444-054X2025000300010</article-id>
<article-id pub-id-type="doi">10.24875/ciru.22000646</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Utility of opportunistic CT Hounsfield Units determined bone quality in chilean women]]></article-title>
<article-title xml:lang="es"><![CDATA[Utilidad de las Unidades Hounsfield de tomografía computarizada oportunista para determinar la calidad ósea en mujeres chilenas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Yurac-Barrientos]]></surname>
<given-names><![CDATA[Ratko]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mardones González]]></surname>
<given-names><![CDATA[Paula]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Núñez-Mardones]]></surname>
<given-names><![CDATA[Marilaura]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bravo-Olivares]]></surname>
<given-names><![CDATA[Oscar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quinteros-Rivas]]></surname>
<given-names><![CDATA[Guísela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ariztía-Fuenzalida]]></surname>
<given-names><![CDATA[Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nazar-Meier]]></surname>
<given-names><![CDATA[Catalina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Marré-Chadwick]]></surname>
<given-names><![CDATA[Andrea]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,University Del Desarrollo School of Medicine Department of Orthopedic and Traumatology]]></institution>
<addr-line><![CDATA[Santiago ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Clínica Alemana de Santiago Spine Unit Department of Traumatology]]></institution>
<addr-line><![CDATA[Santiago ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Clínica Alemana de Santiago Instituto de Ciencias e innovación en Medicina (ICIM) University del Desarrollo Center for Clinical Studies]]></institution>
<addr-line><![CDATA[Santiago ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Hospital Clínico Mutual de Seguridad Spine Unit Department of Traumatology]]></institution>
<addr-line><![CDATA[Santiago ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Hospital Clínico Fuerza Aérea Chile Spine Unit Department of Traumatology]]></institution>
<addr-line><![CDATA[Santiago ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Universidad Católica del Maule School of Medicine Department of Orthopedic and Traumatology]]></institution>
<addr-line><![CDATA[Talca ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af7">
<institution><![CDATA[,Hospital Regional Talca Spine Unit Department of Traumatology]]></institution>
<addr-line><![CDATA[Talca ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af8">
<institution><![CDATA[,Clínica Alemana de Santiago Department of Radiology ]]></institution>
<addr-line><![CDATA[Santiago ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af9">
<institution><![CDATA[,University del Desarrollo School of Medicine ]]></institution>
<addr-line><![CDATA[Santiago ]]></addr-line>
<country>Chile</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2025</year>
</pub-date>
<volume>93</volume>
<numero>3</numero>
<fpage>309</fpage>
<lpage>314</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2444-054X2025000300010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2444-054X2025000300010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2444-054X2025000300010&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective: To describe the correlation between Hounsfield Units in opportunistic computed tomography (CT scan) and T-score measured by dual energy X-ray absorptiometry (DXA) in the Chilean population.  Method: Female patients over 50 years old with CT scan and DXA performed within 6 months. Hounsfield units (HU) were measured by circular regions-of-interest placed on axial slice image of the L1 vertebral body in the CT scan. T-score was obtained through DXA scan in L1-L4 vertebrae.  Results: 144 female patients were included with a mean age in years of 68.39 ± 8.75. A moderate correlation was found between T-score and HU (Pearson coefficient of 0.6, p &lt; 0.001). The mean values of HU differ significantly between the groups of Osteoporosis (OP) (89.46 ± 20.20), Osteopenia (110.87 ± 30.74) and normal bone mineral density (154.53 ± 38.90) (p &lt; 0.01). The area under curve for diagnostic capacity was 0.81 (95% CI 0.72-0.9). The HU thresholds for the diagnosis of OP were 101 (sensitivity 75%, specificity 75%).  Conclusion: Opportunistic CT scan is a useful tool in Chilean population to perform a screening for OP.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo: Describir la correlación entre las Unidades Hounsfield (UH) en tomografía computarizada (TC) oportunista y el T-score medido por absorciometría de rayos X de energía dual (DXA) en población chilena.  Método: Pacientes de sexo femenino mayores de 50 años con TC y DXA realizadas dentro de 6 meses. Las UH se midieron mediante regiones circulares de interés colocadas en una imagen de corte axial de L1 en loa TC. Los puntajes T-score se obtuvieron de la exploración DXA para las vértebras L1-L4.  Resultados: Se incluyeron 144 pacientes con una edad media de 68.39 ± 8.75 años. Se encontró una correlación moderada entre el T-score y las UH (coeficiente de Pearson: 0.6; p &lt; 0.001). Los valores medios de UH difieren significativamente entre los grupos de osteoporosis (89.46 ± 20.20), osteopenia (110.87 ± 30.74) y densidad mineral ósea normal (154.53 ± 38.90) (p &lt; 0.01). El área bajo la curva para la capacidad diagnóstica fue de 0.81 (intervalo de confianza del 95%: 0.72-0.90). El umbrales de UH para el diagnóstico de osteoporosis fue 101 (sensibilidad del 75% y especificidad del 75%).  Conclusión: La TC oportunista es una herramienta útil en la población chilena para realizar tamizaje de osteoporosis.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Osteoporosis]]></kwd>
<kwd lng="en"><![CDATA[Spine]]></kwd>
<kwd lng="en"><![CDATA[Hounsfield Units]]></kwd>
<kwd lng="en"><![CDATA[Computed tomograo scan]]></kwd>
<kwd lng="en"><![CDATA[DXA]]></kwd>
<kwd lng="es"><![CDATA[Osteoporosis]]></kwd>
<kwd lng="es"><![CDATA[Columna]]></kwd>
<kwd lng="es"><![CDATA[Unidades Hounsfield]]></kwd>
<kwd lng="es"><![CDATA[Tomografía computarizada]]></kwd>
<kwd lng="es"><![CDATA[Absorciometría de rayos X de energía dual]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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