Quantification by Quadrants of the Distortion Present in Conventional Panoramic Radiograph

The panoramic radiograph constitutes the "gold standard" for any clinical evaluation in dentistry. It has been universally accepted that it has a global distortion of 25 % due to magnification. The present study was carried out to determine more precise percentages of distortion, and to fi...

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Autor principal:	Zúñiga,Janneth
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2017
Materias:	Panoramic radiograph Orthopantomograph Distortion
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000100043
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spelling	oai:scielo:S0717-950220170001000432017-04-18Quantification by Quadrants of the Distortion Present in Conventional Panoramic RadiographZúñiga,Janneth Panoramic radiograph Orthopantomograph Distortion The panoramic radiograph constitutes the "gold standard" for any clinical evaluation in dentistry. It has been universally accepted that it has a global distortion of 25 % due to magnification. The present study was carried out to determine more precise percentages of distortion, and to find out whether the distortion was due to magnification or minimization. Thirty skulls with their mandibles were divided by two horizontal and four vertical planes in ten quadrants. Wires of different lengths were fixed in each of these quadrants. A panoramic radiograph was taken for each skull. The lengths of the wires measured in the images (distorted value) were compared to the actual lengths of the wires (real value). The concordance correlation coefficient was calculated. Due to high bone density, in the upper lateral quadrants (1 and 5) no measurements could be obtained. In the intermediate upper quadrants (2 and 4) and in the median lower quadrant (8), the horizontal measurements were minimized, while in the intermediate inferior quadrants (7 and 9) and in the lateral inferior quadrants (6 and 10), the horizontal measurements were magnified. In both the upper and the lower quadrants (2, 3, 4, 6, 7, 8, 9, 10) all the vertical measurements were magnified. The percentage of distortion in each quadrant for the horizontal and vertical measurements was reported. The percentage of distortion in a panoramic radiograph of the face varies from one region to another and can be due to either magnification or minimization.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.35 n.1 20172017-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000100043en10.4067/S0717-95022017000100043
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Panoramic radiograph Orthopantomograph Distortion
spellingShingle	Panoramic radiograph Orthopantomograph Distortion Zúñiga,Janneth Quantification by Quadrants of the Distortion Present in Conventional Panoramic Radiograph
description	The panoramic radiograph constitutes the "gold standard" for any clinical evaluation in dentistry. It has been universally accepted that it has a global distortion of 25 % due to magnification. The present study was carried out to determine more precise percentages of distortion, and to find out whether the distortion was due to magnification or minimization. Thirty skulls with their mandibles were divided by two horizontal and four vertical planes in ten quadrants. Wires of different lengths were fixed in each of these quadrants. A panoramic radiograph was taken for each skull. The lengths of the wires measured in the images (distorted value) were compared to the actual lengths of the wires (real value). The concordance correlation coefficient was calculated. Due to high bone density, in the upper lateral quadrants (1 and 5) no measurements could be obtained. In the intermediate upper quadrants (2 and 4) and in the median lower quadrant (8), the horizontal measurements were minimized, while in the intermediate inferior quadrants (7 and 9) and in the lateral inferior quadrants (6 and 10), the horizontal measurements were magnified. In both the upper and the lower quadrants (2, 3, 4, 6, 7, 8, 9, 10) all the vertical measurements were magnified. The percentage of distortion in each quadrant for the horizontal and vertical measurements was reported. The percentage of distortion in a panoramic radiograph of the face varies from one region to another and can be due to either magnification or minimization.
author	Zúñiga,Janneth
author_facet	Zúñiga,Janneth
author_sort	Zúñiga,Janneth
title	Quantification by Quadrants of the Distortion Present in Conventional Panoramic Radiograph
title_short	Quantification by Quadrants of the Distortion Present in Conventional Panoramic Radiograph
title_full	Quantification by Quadrants of the Distortion Present in Conventional Panoramic Radiograph
title_fullStr	Quantification by Quadrants of the Distortion Present in Conventional Panoramic Radiograph
title_full_unstemmed	Quantification by Quadrants of the Distortion Present in Conventional Panoramic Radiograph
title_sort	quantification by quadrants of the distortion present in conventional panoramic radiograph
publisher	Sociedad Chilena de Anatomía
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000100043
work_keys_str_mv	AT zunigajanneth quantificationbyquadrantsofthedistortionpresentinconventionalpanoramicradiograph
_version_	1718444995238690816

Quantification by Quadrants of the Distortion Present in Conventional Panoramic Radiograph

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