On the Representation of Multi-layer Woven Structure

A quantitative method is developed to identify the structures of multi-layer woven fabric in this study. Six structural parameters are selected to represent the fabric structure. With some design criteria for the reinforcement of textile composites, the relationships among the structural parameters are derived for different binding patterns of the fabric structure. The conditions, which meet the requirements of structural cell stability,are also discussed.

多层螺旋CT在卵巢肿瘤蒂扭转中的诊断价值

目的:探讨多层螺旋CT在卵巢肿瘤蒂扭转中的诊断价值。方法:回顾性分析10例经手术病理证实的卵巢肿瘤蒂扭转的CT表现。结果:扭转的卵巢肿瘤为圆形或椭圆形囊实混合性肿块。1例为单房囊肿,6例为多房囊肿,3例密度不均,伴钙化、脂肪影。肿瘤囊壁边缘光滑或稍毛糙,连于肿瘤扭转蒂的一侧囊壁增厚,扭转蒂增粗、扭曲,形成连于肿瘤的假性肿块影,本组5例典型的与肿瘤形成双肿块影。结论:多层螺旋CT能很好地显示蒂扭转肿瘤的CT特征,对卵巢肿瘤蒂扭转有很高的临床诊断价值。