日本放射線技術学会雑誌
Online ISSN : 1881-4883
Print ISSN : 0369-4305
顎関節動態画像を対象とした形態学的解析法
萬代 奈都子真田 茂上木 耕一郎舟迫 慎太郎都築 晋治松井 武司
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59 巻 (2003) 8 号 p. 951-957

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The purpose of this study was to develop a screening technique for temporomandibular disorders (TMD) and assist dentists in objectively and evaluating pre/post-treatment status. Dynamic images of the temporomandibular joint (TMJ) from one healthy volunteer were obtained by digital fluoroscopy in the lateral view on both right and left sides. Outlines of the glenoid fossa and the condyle were extracted, respectively, by using sobel operator (7×7) thresholding and labeling. Morphological parameters in time-sequence, such as fossa ratio, area, and distance of the joint space, were then analyzed. There were no differences between manual and computer analysis in extracting the outline of the glenoid fossa and the condyle. Deformity of the outline of the glenoid fossa and the condyle was not identified in this subject. The fossa ratio was 0.30±0.01 on the right and 0.29±0.02 on the left. The area and distance of the joint space in the post-glenoid fossa were slightly larger than those in the articular eminence on both sides. These morphological parameters were useful for screening and pre- and post-treatment evaluation of TMD patients.

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© 2003 公益社団法人 日本放射線技術学会
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