Evaluation of the resolving potency of a novel reconstruction filter on periodontal ligament space with dental cone-beam CT: a quantitative phantom study

Yuuki Houno; Toshimitsu Hishikawa; Ken-ichi Gotoh; Munetaka Naitoh; Eiichiro Ariji; Yoshie Kodera

doi:10.1117/12.2043346

19 March 2014 Evaluation of the resolving potency of a novel reconstruction filter on periodontal ligament space with dental cone-beam CT: a quantitative phantom study

Yuuki Houno, Toshimitsu Hishikawa, Ken-ichi Gotoh, Munetaka Naitoh, Eiichiro Ariji, Yoshie Kodera

Author Affiliations +

Proceedings Volume 9033, Medical Imaging 2014: Physics of Medical Imaging; 90334O (2014) https://doi.org/10.1117/12.2043346
Event: SPIE Medical Imaging, 2014, San Diego, California, United States

Abstract

Diagnosis of the alveolar bone condition is important for the treatment planning of periodontal disease. Especially the determination of periodontal ligament space is the most important remark because it represents the periodontal tissue support for tooth retention. However, owing to the image blur of the current cone-beam CT (CBCT) imaging technique, the periodontal ligament space is difficult to visualize. In this study, we developed an original periodontal ligament phantom (PLP) and evaluated the image quality of simulated periodontal ligament space using a novel reconstruction filter for CBCT that emphasized high frequency component. PLP was composed from two resin blocks of different materials, the bone equivalent block and the dentine equivalent block. They were assembled to make continuously changing space from 0.0 to 1.0 millimeter that mimics periodontal ligament space. PLP was placed in water and the image was obtained by using Alphard-3030 dental cone-beam CT (Asahi Roentgen Industry Co., Ltd.). Then we reconstructed the projection data with a novel reconstruction filter. The axial images were compared with conventional reconstructed images. In novel filter reconstruction images, 0.4 millimeter of the space width was steadily detected by calculation of pixel value, on the other hand 0.6 millimeter was in conventional images. With our method, the resolving potency of conebeam CT images was improved.

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Yuuki Houno, Toshimitsu Hishikawa, Ken-ichi Gotoh, Munetaka Naitoh, Eiichiro Ariji, and Yoshie Kodera "Evaluation of the resolving potency of a novel reconstruction filter on periodontal ligament space with dental cone-beam CT: a quantitative phantom study", Proc. SPIE 9033, Medical Imaging 2014: Physics of Medical Imaging, 90334O (19 March 2014); https://doi.org/10.1117/12.2043346

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KEYWORDS

Image filtering

Bone

Computed tomography

Visualization

CT reconstruction

Reconstruction algorithms

Image acquisition

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