フラットパネルディテクタ装置による頭部軸位動態画像を対象とした顎関節動態解析法

概要

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The purpose of this study is to develop the method of quantitative analysis of the temporomandibular joint (TMJ) kinetics using a dynamic flat panel detector (FPD) system. Axially positioned dynamic radiographs of the TMJ were obtained during opening and closing of the mouth using FPD system (Modified CXDI-40G, CANON) . The entrance surface dose was 1.7 times that of conventional imaging. The subjects were two asymptomatic volunteers and one symptomatic volunteer who had a click on the right TMJ. The accumulated image subtraction technique was used to enhance the mandibles and then we manually measured the medial point of the condyle and incisor. In the case of the subject with TMD symptom, there were lateral deviation in the incisal path and the changes in the maximum velocity of condyle were found. This may be caused by the clicking disorder. Our new method provides detailed dynamic data concerning the movement of the condyle in the TMJ. This data can be used to assist in the diagnosing of pre-and post-operative temporomandibular disorder patients.
医用画象情報学会の論文
2005-01-01