著者

中野 幸雄 日比野 仁子 杉本 勝正

出版者

日本肩関節学会

雑誌

肩関節 (ISSN:09104461)

巻号頁・発行日

vol.25, no.2, pp.235-239, 2001-08-02 (Released:2012-11-20)

参考文献数

5

被引用文献数

1

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[Purpose]The coracohumeral(CH)ligament is deeply related to the restriction of lateral rotation of the shoulder joint. The present report concerns our experience in evaluation of the CH ligament by 3D MRI in relation to the restriction of a lateral rotation.[Materials and methods]The study covered 43 shoulders of 43 patients who had disorders in the shoulder since 1999, and underwent 3D MRI examination. Of these subjects, llshoulders of llpatients were examined twice, when the symptom was distinct and at a stage of remission. As controls,9shoulders of 8 healthy persons were observed. The MRI equipment used was Model SIGNA HORIZON LX 1. OT of GE Yokokawa Medical, and images were constructed on the basis of 3D GRASS images (TR 32, TE 15) derived from 100 consecutive slices of 1mm thickness. The correlation of the angle of lateral rotation as measured at the time of MRI examination with the thickness, length and signal intensity of CH ligament determined on MRI image was checked.[Results]The mean values of lateral rotational angle, and thickness of CH ligament were 71.1°and 3.1mm, respectively, in the normal group(N), while those in the symptomatic group(S)were 35.6°and 5.2mm. A significant correlation was recognized between the lateral rotation angle and the thickness of the CH ligament. No significant correlation was seen between the lateral rotation angle, signal intensity and ligament length. in group S2 where the MRI examination was carried out twice, at the symptomatic phase and at the remission phase, the lateral rotation angle increased and the thickness of the CH ligament reduced significantly in the remission phase in comparison to those in the symptomatic phase.[Conclusion]The more the lateral rotation was restricted, the greater the thickness of the CH ligament was. This study indicates that the movable range of the shoulder joint can be estimated on the basis of image diagnosis.