Imaging Science in Dentistry

  • 제48권2호
  • /
  • Pages.111-119
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  • 2018
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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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Linear accuracy of cone-beam computed tomography and a 3-dimensional facial scanning system: An anthropomorphic phantom study

  • Oh, Song Hee (Department of Oral and Maxillofacial Radiology, Graduate School, Kyung Hee University) ;
  • Kang, Ju Hee (Department of Oral and Maxillofacial Radiology, Graduate School, Kyung Hee University) ;
  • Seo, Yu-Kyeong (Department of Oral and Maxillofacial Radiology, Graduate School, Kyung Hee University) ;
  • Lee, Sae Rom (Department of Oral and Maxillofacial Radiology, Graduate School, Kyung Hee University) ;
  • Choi, Hwa-Young (Department of Dental Hygiene, College of Health, Kyungwoon University) ;
  • Choi, Yong-Suk (Department of Oral and Maxillofacial Radiology, Graduate School, Kyung Hee University) ;
  • Hwang, Eui-Hwan (Department of Oral and Maxillofacial Radiology, Graduate School, Kyung Hee University)
  • 투고 : 2018.02.16
  • 심사 : 2018.03.26
  • 발행 : 2018.06.30
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초록

Purpose: This study was conducted to evaluate the accuracy of linear measurements of 3-dimensional (3D) images generated by cone-beam computed tomography (CBCT) and facial scanning systems, and to assess the effect of scanning parameters, such as CBCT exposure settings, on image quality. Materials and Methods: CBCT and facial scanning images of an anthropomorphic phantom showing 13 soft-tissue anatomical landmarks were used in the study. The distances between the anatomical landmarks on the phantom were measured to obtain a reference for evaluating the accuracy of the 3D facial soft-tissue images. The distances between the 3D image landmarks were measured using a 3D distance measurement tool. The effect of scanning parameters on CBCT image quality was evaluated by visually comparing images acquired under different exposure conditions, but at a constant threshold. Results: Comparison of the repeated direct phantom and image-based measurements revealed good reproducibility. There were no significant differences between the direct phantom and image-based measurements of the CBCT surface volume-rendered images. Five of the 15 measurements of the 3D facial scans were found to be significantly different from their corresponding direct phantom measurements(P<.05). The quality of the CBCT surface volume-rendered images acquired at a constant threshold varied across different exposure conditions. Conclusion: These results proved that existing 3D imaging techniques were satisfactorily accurate for clinical applications, and that optimizing the variables that affected image quality, such as the exposure parameters, was critical for image acquisition.

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참고문헌

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피인용 문헌

  1. Accuracy of three-dimensional photogrammetry and cone beam computed tomography based on linear measurements in patients with facial deformities vol.50, pp.2, 2021, https://doi.org/10.1259/dmfr.20200001