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        "resumen" => "<span class="elsevierStyleSectionTitle">Objective</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Image analysis techniques over ultrasonograms may be useful to extract quantitative information&#46; Because ecography and the selection of the area of interest are technician-dependent&#44; the objective of this work was to calculate the reliability and the reproducibility of the analysis method&#46;</p> <span class="elsevierStyleSectionTitle">Material and methods</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Test-retest reliability study on 60 cross-sectional patellar ligament ultrasonograms on 1<span class="elsevierStyleHsp" style=""></span>cm of patella were carried out&#46; Sonosite Titan L-38 &#40;5&#8211;10 MHz&#41; and the Image analysis software J v1&#46;40 were used&#46; Morphometric variables were&#58; perimeter&#44; area&#44; width&#44; thickness&#44; and mean echogenity&#59; textural variables were&#58; uniformity&#44; homogeneity and entropy&#46; The intraclass correlation coefficient &#40;ICC&#41; was calculated with a confidence interval of 95&#37;&#46;</p> <span class="elsevierStyleSectionTitle">Results</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Intraclass correlation coefficients over 0&#44;70 were found&#44; with an agreement ranging from good to very good in all of the variables both for the intra ecography and inter ecography studies&#46;</p> <span class="elsevierStyleSectionTitle">Conclusion</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Very good levels of reliability and internal consistency were seen&#44; demonstrating that from the statistical point of view&#44; the variability introduced by the technician is not significant&#46; This method can be taken as a reference to analyze the reliability between several ultrasonographers&#46;</p>"
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        "resumen" => "<span class="elsevierStyleSectionTitle">Objetivos</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">La aplicaci&#243;n de ecograf&#237;a cuantitativa sobre el tejido tendinoso puede resultar de utilidad pero es necesario conocer la fiabilidad tanto del proceso de la toma ecogr&#225;fica como de la selecci&#243;n de las regiones para el an&#225;lisis&#46; Los objetivos del trabajo fueron calcular la fiabilidad y reproducibilidad del m&#233;todo de an&#225;lisis morfotextural intra-ecograf&#237;a e interecograf&#237;a del tend&#243;n rotuliano&#46;</p> <span class="elsevierStyleSectionTitle">Material y m&#233;todos</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Estudio de concordancia del tipo testretest sobre 120 ecograf&#237;as transversales del tend&#243;n rotuliano a 1<span class="elsevierStyleHsp" style=""></span>cm del pico de la r&#243;tula&#44; con un ec&#243;grafo Sonosite Titan y sonda L-38 &#40;5&#8211;10 MHz&#41; y el software de an&#225;lisis Image J v1&#46;40&#46; Se calcularon variables morfom&#233;tricas&#58; per&#237;metro&#44; &#225;rea&#44; anchura&#44; grosor y ecogenicidad media&#59; y texturales&#58; uniformidad&#44; homogeneidad y entrop&#237;a&#46; Se calcul&#243; el coeficiente de correlaci&#243;n intraclase &#40;CCI&#41; junto con las representaciones gr&#225;ficas de Bland con un IC del 95&#37;&#46;</p> <span class="elsevierStyleSectionTitle">Resultados</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Se encontraron coeficientes de correlaci&#243;n intraclase con valores superiores a 0&#44;70&#44; con fuerza de la concordancia entre buena y muy buena en todas las variables y tanto en el estudio intraecograf&#237;a como en el estudio interecograf&#237;a&#46;</p> <span class="elsevierStyleSectionTitle">Conclusi&#243;n</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">La fiabilidad del m&#233;todo fue buena por lo que la variabilidad introducida por los exploradores no es significativa y el m&#233;todo es potencialmente v&#225;lido para el estudio y cuantificaci&#243;n ecogr&#225;fica del tejido tendinoso&#46;</p>"
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Journal Information
Vol. 6. Issue 6.
Pages 278-284 (November - December 2010)
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Vol. 6. Issue 6.
Pages 278-284 (November - December 2010)
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Reliability and reproducibility of a morpho-textural image analysis method over a patellar ligament ultrasonography
Fiabilidad y reproducibilidad de un nuevo método de análisis morfotextural de imágenes ecográficas del tendón rotuliano
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José Ríos-Díaza,
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jrios@pdi.ucam.edu

Corresponding author.
, Ana de Groot Ferrandob, Jacinto J. Martínez-Payáa, Mária Elena del Baño Aledoa
a Grupo de Investigación “Ecografía y Morfo-densitometría Preventiva”, Departamento Ciencias de la Salud, Universidad Católica San Antonio de Murcia (UCAM), Murcia, Spain
b Khronos Fisioterapia, Elche, Alicante, Spain
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Abstract
Objective

Image analysis techniques over ultrasonograms may be useful to extract quantitative information. Because ecography and the selection of the area of interest are technician-dependent, the objective of this work was to calculate the reliability and the reproducibility of the analysis method.

Material and methods

Test-retest reliability study on 60 cross-sectional patellar ligament ultrasonograms on 1cm of patella were carried out. Sonosite Titan L-38 (5–10 MHz) and the Image analysis software J v1.40 were used. Morphometric variables were: perimeter, area, width, thickness, and mean echogenity; textural variables were: uniformity, homogeneity and entropy. The intraclass correlation coefficient (ICC) was calculated with a confidence interval of 95%.

Results

Intraclass correlation coefficients over 0,70 were found, with an agreement ranging from good to very good in all of the variables both for the intra ecography and inter ecography studies.

Conclusion

Very good levels of reliability and internal consistency were seen, demonstrating that from the statistical point of view, the variability introduced by the technician is not significant. This method can be taken as a reference to analyze the reliability between several ultrasonographers.

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Resumen
Objetivos

La aplicación de ecografía cuantitativa sobre el tejido tendinoso puede resultar de utilidad pero es necesario conocer la fiabilidad tanto del proceso de la toma ecográfica como de la selección de las regiones para el análisis. Los objetivos del trabajo fueron calcular la fiabilidad y reproducibilidad del método de análisis morfotextural intra-ecografía e interecografía del tendón rotuliano.

Material y métodos

Estudio de concordancia del tipo testretest sobre 120 ecografías transversales del tendón rotuliano a 1cm del pico de la rótula, con un ecógrafo Sonosite Titan y sonda L-38 (5–10 MHz) y el software de análisis Image J v1.40. Se calcularon variables morfométricas: perímetro, área, anchura, grosor y ecogenicidad media; y texturales: uniformidad, homogeneidad y entropía. Se calculó el coeficiente de correlación intraclase (CCI) junto con las representaciones gráficas de Bland con un IC del 95%.

Resultados

Se encontraron coeficientes de correlación intraclase con valores superiores a 0,70, con fuerza de la concordancia entre buena y muy buena en todas las variables y tanto en el estudio intraecografía como en el estudio interecografía.

Conclusión

La fiabilidad del método fue buena por lo que la variabilidad introducida por los exploradores no es significativa y el método es potencialmente válido para el estudio y cuantificación ecográfica del tejido tendinoso.

Palabras clave:
Ecografía
Fiabilidad
Tendón rotuliano
Análisis textural
Procesamiento de imagen asistido
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