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Removing Distortion of Periapical Radiographs in Dental Digital Radiography Using Embedded Markers in an External frame

To carry out in vivo and in vitro comparative pilot study to evaluate the preciseness of a newly proposed digital dental radiography setup. This setup was based on markers placed on an external frame to eliminate the measurement errors due to incorrect geometry in relative positioning of cone, teeth...

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Autores principales: Kafieh, Rahele, Shahamoradi, Mahdi, Hekmatian, Ehsan, Foroohandeh, Mehrdad, Emamidoost, Mostafa
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medknow Publications & Media Pvt Ltd 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3662105/
https://www.ncbi.nlm.nih.gov/pubmed/23724372
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author Kafieh, Rahele
Shahamoradi, Mahdi
Hekmatian, Ehsan
Foroohandeh, Mehrdad
Emamidoost, Mostafa
author_facet Kafieh, Rahele
Shahamoradi, Mahdi
Hekmatian, Ehsan
Foroohandeh, Mehrdad
Emamidoost, Mostafa
author_sort Kafieh, Rahele
collection PubMed
description To carry out in vivo and in vitro comparative pilot study to evaluate the preciseness of a newly proposed digital dental radiography setup. This setup was based on markers placed on an external frame to eliminate the measurement errors due to incorrect geometry in relative positioning of cone, teeth and the sensor. Five patients with previous panoramic images were selected to undergo the proposed periapical digital imaging for in vivo phase. For in vitro phase, 40 extracted teeth were replanted in dry mandibular sockets and periapical digital images were prepared. The standard reference for real scales of the teeth were obtained through extracted teeth measurements for in vitro application and were calculated through panoramic imaging for in vivo phases. The proposed image processing thechnique was applied on periapical digital images to distinguish the incorrect geometry. The recognized error was inversely applied on the image and the modified images were compared to the correct values. The measurement findings after the distortion removal were compared to our gold standards (results of panoramic imaging or measurements from extracted teeth) and showed the accuracy of 96.45% through in vivo examinations and 96.0% through in vitro tests. The proposed distortion removal method is perfectly able to identify the possible inaccurate geometry during image acquisition and is capable of applying the inverse transform to the distorted radiograph to obtain the correctly modified image. This can be really helpful in applications like root canal therapy, implant surgical procedures and digital subtraction radiography, which are essentially dependent on precise measurements.
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spelling pubmed-36621052013-05-30 Removing Distortion of Periapical Radiographs in Dental Digital Radiography Using Embedded Markers in an External frame Kafieh, Rahele Shahamoradi, Mahdi Hekmatian, Ehsan Foroohandeh, Mehrdad Emamidoost, Mostafa J Med Signals Sens Original Article To carry out in vivo and in vitro comparative pilot study to evaluate the preciseness of a newly proposed digital dental radiography setup. This setup was based on markers placed on an external frame to eliminate the measurement errors due to incorrect geometry in relative positioning of cone, teeth and the sensor. Five patients with previous panoramic images were selected to undergo the proposed periapical digital imaging for in vivo phase. For in vitro phase, 40 extracted teeth were replanted in dry mandibular sockets and periapical digital images were prepared. The standard reference for real scales of the teeth were obtained through extracted teeth measurements for in vitro application and were calculated through panoramic imaging for in vivo phases. The proposed image processing thechnique was applied on periapical digital images to distinguish the incorrect geometry. The recognized error was inversely applied on the image and the modified images were compared to the correct values. The measurement findings after the distortion removal were compared to our gold standards (results of panoramic imaging or measurements from extracted teeth) and showed the accuracy of 96.45% through in vivo examinations and 96.0% through in vitro tests. The proposed distortion removal method is perfectly able to identify the possible inaccurate geometry during image acquisition and is capable of applying the inverse transform to the distorted radiograph to obtain the correctly modified image. This can be really helpful in applications like root canal therapy, implant surgical procedures and digital subtraction radiography, which are essentially dependent on precise measurements. Medknow Publications & Media Pvt Ltd 2012 /pmc/articles/PMC3662105/ /pubmed/23724372 Text en Copyright: © Journal of Medical Signals and Sensors http://creativecommons.org/licenses/by-nc-sa/3.0 This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Kafieh, Rahele
Shahamoradi, Mahdi
Hekmatian, Ehsan
Foroohandeh, Mehrdad
Emamidoost, Mostafa
Removing Distortion of Periapical Radiographs in Dental Digital Radiography Using Embedded Markers in an External frame
title Removing Distortion of Periapical Radiographs in Dental Digital Radiography Using Embedded Markers in an External frame
title_full Removing Distortion of Periapical Radiographs in Dental Digital Radiography Using Embedded Markers in an External frame
title_fullStr Removing Distortion of Periapical Radiographs in Dental Digital Radiography Using Embedded Markers in an External frame
title_full_unstemmed Removing Distortion of Periapical Radiographs in Dental Digital Radiography Using Embedded Markers in an External frame
title_short Removing Distortion of Periapical Radiographs in Dental Digital Radiography Using Embedded Markers in an External frame
title_sort removing distortion of periapical radiographs in dental digital radiography using embedded markers in an external frame
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3662105/
https://www.ncbi.nlm.nih.gov/pubmed/23724372
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