Imaging Science in Dentistry

  • 제43권3호
  • /
  • Pages.163-169
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  • 2013
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  • 2233-7822(pISSN)
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  • 2233-7830(eISSN)
대한영상치의학회 (Korean Academy of Oral and Maxillofacial Radiology)
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Bilateral and pseudobilateral tonsilloliths: Three dimensional imaging with cone-beam computed tomography

  • Misirlioglu, Melda (Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Kirikkale University) ;
  • Nalcaci, Rana (Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Ankara University) ;
  • Adisen, Mehmet Zahit (Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Kirikkale University) ;
  • Yardimci, Selmi (Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Kirikkale University)
  • 투고 : 2012.12.05
  • 심사 : 2013.03.15
  • 발행 : 2013.09.30
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초록

Purpose: Tonsilloliths are calcifications found in the crypts of the palatal tonsils and can be detected on routine panoramic examinations. This study was performed to highlight the benefits of cone-beam computed tomography (CBCT) in the diagnosis of tonsilloliths appearing bilaterally on panoramic radiographs. Materials and Methods: The sample group consisted of 7 patients who had bilateral radiopaque lesions at the area of the ascending ramus on panoramic radiographs. CBCT images for every patient were obtained from both sides of the jaw to determine the exact locations of the lesions and to rule out other calcifications. The calcifications were evaluated on the CBCT images using Ez3D2009 software. Additionally, the obtained images in DICOM format were transferred to ITK SNAP 2.4.0 pc software for semiautomatic segmentation. Segmentation was performed using contrast differences between the soft tissues and calcifications on grayscale images, and the volume in mm3 of the segmented three dimensional models were obtained. Results: CBCT scans revealed that what appeared on panoramic radiographs as bilateral images were in fact unilateral lesions in 2 cases. The total volume of the calcifications ranged from 7.92 to $302.5mm^3$. The patients with bilaterally multiple and large calcifications were found to be symptomatic. Conclusion: The cases provided the evidence that tonsilloliths should be considered in the differential diagnosis of radiopaque masses involving the mandibular ramus, and they highlight the need for a CBCT scan to differentiate pseudo- or ghost images from true bilateral pathologies.

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참고문헌

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피인용 문헌

  1. Palatine Tonsilloliths: A Retrospective Study on 500 Digital Panoramic Radiographs vol.19, pp.10, 2013, https://doi.org/10.5005/jp-journals-10024-2418
  2. Comparison of Panoramic Radiography and Cone-Beam Computed Tomography for the Detection of Tonsilloliths vol.29, pp.3, 2013, https://doi.org/10.1159/000505436