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The effects of image compression on quantitative measurements of digital panoramic radiographs

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The effects of image compression on quantitative measurements of digital panoramic radiographs

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dc.contributor.author Yasar, Füsun es
dc.contributor.author Apaydin, Burcu es
dc.contributor.author Yilmaz, Hasan-Hüseyin es
dc.date.accessioned 2014-05-28T12:42:50Z
dc.date.available 2014-05-28T12:42:50Z
dc.date.issued 2012 es
dc.identifier.citation Yasar, Füsun ; Apaydin, Burcu ; Yilmaz, Hasan-Hüseyin. The effects of image compression on quantitative measurements of digital panoramic radiographs. En: Medicina oral, patología oral y cirugía bucal. Ed inglesa, 2012, Vol. 17, No. 6: 1074-1081 es
dc.identifier.uri http://hdl.handle.net/10550/35524
dc.description.abstract Objectives: The aims of this study were to explore how image compression affects density, fractal dimension, linear and angular measurements on digital panoramic images and assess inter and intra-observer repeatability of these measurements. Study Design: Sixty-one digital panoramic images in TIFF format (Tagged Image File Format) were compressed to JPEG (Joint Photographic Experts Group) images. Two observers measured gonial angle, antegonial angle, mandibular cortical width, coronal pulp width of maxillary and mandibular first molar, tooth length of maxillary and mandibular first molar on the left side of these images twice. Fractal dimension of the selected regions of interests were calculated and the density of each panoramic radiograph as a whole were also measured on TIFF and JPEG compressed images. Intra-observer and inter-observer consistency was evaluated with Cronbach's alpha. Paired samples t-test and Kolmogorov-Smirnov test was used to evaluate the difference between the measurements of TIFF and JPEG compressed images. Results: The repeatability of angular measurements had the highest Cronbach's alpha value (0.997). There was statistically significant difference for both of the observers in mandibular cortical width (MCW) measurements (1st ob. p: 0.002; 2nd ob. p: 0.003), density (p<0.001) and fractal dimension (p<0.001) between TIFF and JPEG images. There was statistically significant difference for the first observer in antegonial angle (1st ob p< 0.001) and maxillary molar coronal pulp width (1st ob. p< 0.001) between JPEG and TIFF files. Conclusions: The repeatability of angular measurements is better than linear measurements. Mandibular cortical width, fractal dimension and density are affected from compression. Observer dependent factors might also cause statistically significant differences between the measurements in TIFF and JPEG images. en_US
dc.subject Odontología es
dc.subject Ciencias de la salud es
dc.title The effects of image compression on quantitative measurements of digital panoramic radiographs es
dc.type journal article es_ES
dc.subject.unesco UNESCO::CIENCIAS MÉDICAS es
dc.type.hasVersion VoR es_ES

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