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자료유형
학술저널
저자정보
Houno, Yuuki (Graduate School of Medicine, Nagoya University) Hishikawa, Toshimitsu (Department of Periodontology, School of Dentistry, Aichi Gakuin University) Gotoh, Ken-ichi (Division of Radiology, Dental Hospital, Aichi Gakuin University) Naitoh, Munetaka (Department of Oral and Maxillofacial Radiology, School of Dentistry, Aichi Gakuin University) Mitani, Akio (Department of Periodontology, School of Dentistry, Aichi Gakuin University) Noguchi, Toshihide (Department of Periodontology, School of Dentistry, Aichi Gakuin University) Ariji, Eiichiro (Department of Oral and Maxillofacial Radiology, School of Dentistry, Aichi Gakuin University) Kodera, Yoshie (Graduate School of Medicine, Nagoya University)
저널정보
대한영상치의학회 Imaging science in dentistry Imaging science in dentistry 제47권 제3호
발행연도
2017.1
수록면
199 - 207 (9page)

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Purpose: Evaluation of alveolar bone is important in the diagnosis of dental diseases. The periodontal ligament space is difficult to clearly depict in cone-beam computed tomography images because the reconstruction filter conditions during image processing cause image blurring, resulting in decreased spatial resolution. We examined different reconstruction filters to assess their ability to improve spatial resolution and allow for a clearer visualization of the periodontal ligament space. Materials and Methods: Cone-beam computed tomography projections of 2 skull phantoms were reconstructed using 6 reconstruction conditions and then compared using the Thurstone paired comparison method. Physical evaluations, including the modulation transfer function and the Wiener spectrum, as well as an assessment of space visibility, were undertaken using experimental phantoms. Results: Image reconstruction using a modified Shepp-Logan filter resulted in better sensory, physical, and quantitative evaluations. The reconstruction conditions substantially improved the spatial resolution and visualization of the periodontal ligament space. The difference in sensitivity was obtained by altering the reconstruction filter. Conclusion: Modifying the characteristics of a reconstruction filter can generate significant improvement in assessments of the periodontal ligament space. A high-frequency enhancement filter improves the visualization of thin structures and will be useful when accurate assessment of the periodontal ligament space is necessary.

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