日本放射線技術学会雑誌
Online ISSN : 1881-4883
Print ISSN : 0369-4305
顎関節を対象とした動態撮影法およびその機能解析法
萬代 奈都子真田 茂上木 耕一郎船迫 慎太郎松井 武司都築 晋治
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59 巻 (2003) 3 号 p. 416-422

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To develop a method of kinetic radiography and a computer-aided diagnosis (CAD) system for quantitative evaluation of the temporomandibular joint (TMJ), dynamic images of the TMJ from one healthy volunteer were obtained by fluoroscopy in the lateral view on the right and left sides. The accumulated image subtraction technique extracted the condyle in each image. A sequential similarity detection algorithm (SSDA) was employed to trace the movement path and the velocity of the condyle. The shape of the path of the right condyle was smoother than that of the left condyle. The size of the maximum vertical and horizontal movements of the condyle were 4.6±0.1 mm and 15.0±0.2 mm, respectively. The velocity of the movement of the condyle was higher in the area close to the articular eminence than in any other area during the opening and closing of the mouth. This CAD system will contribute to the kinetic analysis of the TMJ for screening, follow-up study, and informed consent, providing speed, quantitation, and cost-effectiveness.

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© 2003 公益社団法人 日本放射線技術学会
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