Correction factors determination for panoramic radiography using a phantom of mandible. (English)

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  • Additional Information
    • Publication Year:
      2008
    • Author-Supplied Keywords:
      Correction factor
      Distortion
      Magnification
      Panoramic
      Radiography
    • NAICS/Industry Codes:
      NAICS/Industry Codes 811219 Other Electronic and Precision Equipment Repair and Maintenance
      621512 Diagnostic Imaging Centers
      332210 Cutlery and hand tool manufacturing
      332216 Saw Blade and Handtool Manufacturing
    • Abstract:
      Background and Aim: Image distortion is one of the major problems in panoramic radiography. Horizontal and vertical correction factors could be determined for more efficient clinical applications. The purpose of this study was to determine horizontal and vertical correction factors in panoramic radiography. Materials and Methods: In this test evaluation study in which an asymetric mandibular phantom was constructed by plexiglass and aluminium as soft and hard tissue equivalents. The right half was slightly shorter than the left half. Steel markers were installed to make vertical and horizontal measurments possible.The length of the markers as well as the intermarker distances were measured by Mitutoyo digital micrometer which was accurate within ±0.05mm. The phantom was then positioned in PM 2002 cc proline (Planmeca, Finland) panoramic machine and panoramic images were obtained. 8 times for each half of the phan. The same length and inter marker distances were measured on digitized panoramic images by Cygnus software, which was accurate whitin ±0.01 mm. Magnification and correction factors were determined for the vertical and horizontal dimensions in each region of pantomograms. Results: The mean vertical correction factor was 0.77±0.02 (range: 0.75-0.80) in the right and 0.77±0.05 (range: 0.75-0.85) in the left half jaw. The mean horizontal correction factor was calculated as 0.98±0.15 (range: 0.76-1.18) in the right and 1.02±0.14 (range: 0.90-1.25) in the left half jaw. Conclusion: Dissimilarity of vertical and horizontal correction factors among left and right half jaws and also in different regions of a half jaw is relatively considerable. However, a constant correction factor, specialy in horizontal aspect, could not be applicable. Comparing with horizontal correction factors the vertical correction factors showed less variations between different regions as well as different samples. [ABSTRACT FROM AUTHOR]
    • Abstract:
      Copyright of Journal of Dental Medicine is the property of Tehran University of Medical Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
    • ISSN:
      1024641X
    • Accession Number:
      41028177
  • Citations
    • ABNT:
      SHIRAZI, A. et al. Correction factors determination for panoramic radiography using a phantom of mandible. (English). Journal of Dental Medicine, [s. l.], v. 21, n. 3, p. 1, 2008. Disponível em: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edb&AN=41028177. Acesso em: 22 out. 2020.
    • AMA:
      Shirazi A, Talaiepoor AR, Noroozpoor Y, Fakhar HB, Ghasemzade A, Shakeri N. Correction factors determination for panoramic radiography using a phantom of mandible. (English). Journal of Dental Medicine. 2008;21(3):1. Accessed October 22, 2020. http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edb&AN=41028177
    • APA:
      Shirazi, A., Talaiepoor, A. R., Noroozpoor, Y., Fakhar, H. B., Ghasemzade, A., & Shakeri, N. (2008). Correction factors determination for panoramic radiography using a phantom of mandible. (English). Journal of Dental Medicine, 21(3), 1.
    • Chicago/Turabian: Author-Date:
      Shirazi, A., A. R. Talaiepoor, Y. Noroozpoor, H. Bashizade Fakhar, A. Ghasemzade, and N. Shakeri. 2008. “Correction Factors Determination for Panoramic Radiography Using a Phantom of Mandible. (English).” Journal of Dental Medicine 21 (3): 1. http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edb&AN=41028177.
    • Harvard:
      Shirazi, A. et al. (2008) ‘Correction factors determination for panoramic radiography using a phantom of mandible. (English)’, Journal of Dental Medicine, 21(3), p. 1. Available at: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edb&AN=41028177 (Accessed: 22 October 2020).
    • Harvard: Australian:
      Shirazi, A, Talaiepoor, AR, Noroozpoor, Y, Fakhar, HB, Ghasemzade, A & Shakeri, N 2008, ‘Correction factors determination for panoramic radiography using a phantom of mandible. (English)’, Journal of Dental Medicine, vol. 21, no. 3, p. 1, viewed 22 October 2020, .
    • MLA:
      Shirazi, A., et al. “Correction Factors Determination for Panoramic Radiography Using a Phantom of Mandible. (English).” Journal of Dental Medicine, vol. 21, no. 3, Dec. 2008, p. 1. EBSCOhost, search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edb&AN=41028177.
    • Chicago/Turabian: Humanities:
      Shirazi, A., A. R. Talaiepoor, Y. Noroozpoor, H. Bashizade Fakhar, A. Ghasemzade, and N. Shakeri. “Correction Factors Determination for Panoramic Radiography Using a Phantom of Mandible. (English).” Journal of Dental Medicine 21, no. 3 (December 2008): 1. http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edb&AN=41028177.
    • Vancouver/ICMJE:
      Shirazi A, Talaiepoor AR, Noroozpoor Y, Fakhar HB, Ghasemzade A, Shakeri N. Correction factors determination for panoramic radiography using a phantom of mandible. (English). Journal of Dental Medicine [Internet]. 2008 Dec [cited 2020 Oct 22];21(3):1. Available from: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edb&AN=41028177