Abstract

目的 探讨眼内异物CT定位新方法.方法筛选 26例后极以外眼球壁和视网膜表面粘连异物,予CT眼球平扫和眼球横扫后,分别行眼球横扫联合子午面重建定位法(新法)、眼球平扫联合眼球横扫定位法(传统方法Ⅰ)和眼球平扫直角坐标定位法(传统方法Ⅱ)定位.以术中间接检眼镜监视下定位或术中直接看到的异物位置为验证标准,分别测量依据以上3种CT定位数据确立的异物球表定点位置的经、纬向误差.结果26例异物球表定点位置的经、纬向平均误差分别为1.53、1.64 mm(新法),1.37、1.64 mm(传统方法Ⅰ)和2.02、2.55 mm(传统方法Ⅱ).经配对t检验,新法较传统方法Ⅰ差异无统计意义(经向:P>0.6,纬向:P=1);新法较传统方法Ⅱ差异有统计意义(经向:P<0.05,纬向:P<0.01).结论新法较传统方法更简便、更直观、更富发展前景。

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