目 的 评价多层螺旋 C T ( m u l t i s l i c e s p i r a l c o m p u t e d tomography，MSCT)三维重建对眼部异物 的定位价值。方法 选取2013年8月到2015 年12月期间来我院就诊的可疑眼部异物患 者74例(74只眼)，进行眼眶DR拍摄和MSCT 三维重建，比较两种方法眼部异物的检出 率；眼眶-DR法拍摄阳性患者行角膜-DR定 位法，测量出异物与水平面、矢状面、角 巩膜缘距离。结果 74例患者经手术确诊 69例存在眼部异物，MSCT三维重建法检测 异物28例，检出率37.84%；眼眶DR法检出 异物21例，检出率28.38%，经比较差异有 统计学意义(P=0.003)；21例眼眶DR法检 测出异物的患者MSCT均能检测出。以眼 眶DR法测量值-MSCT三维重建法测量值为 检验统计量，异物点钟位(0.03±0.32) mm(t=1.296，P＞0.05)，异物与矢状 面距离(0.03±0.41)mm(t=0.896，P＞ 0.05)，异物与水平面距离(0.05±0.35) mm(t=1.564，P＞0.05)，异物与角巩膜 缘距离(0.12±0.81)mm(t=1.182，P＞ 0.05)。结论 MSCT三维重建眼部异物检出 率高，定位较为准确，对于眼部异物定位 具有重要价值。

Objective To evaluate the value of three-dimensional reconstruction of multislice spiral CT scan in the localization of ocular foreign body. Methods 74 cases (74 eyes) suspicious patients with ocular foreign body were selected and accepted DR film and MSCT three-dimensional reconstruction respectively from August 2013 to December 2015, to compare the detection rate of two methods. The location of foreign body and the distances of foreign body with sagittal, horizontal and limbus were measured. Results 69 cases were confirmed with ocular foreign body by surgery in the total 74 cases, 28 cases were diagnosed by three-dimensional reconstruction of multislice spiral CT scan, withthe detection rate of 37.84%, while 21 cases were diagnosed by orbital digital radiography, with the detection rate of 28.38%. The difference was statistical significance(P=0.003), the location of foreign body and the distances of foreign body with sagittal, horizontal and limbus measured by three-dimensional reconstruction of multislice spiral CT scan were similar to those measured by orbital digital radiography. The differences had no statistical significance, the location of foreign body at (0.03±0.32) mm (t=1.296, P>1.296), the sagittal distances of foreign body were (0.03±0.41) mm (t=0.896, P> 0.896), the horizontal distances of foreign body were (0.05±0.35)mm (t=1.564, P>1.564), the distances between foreign body were (0.12±0.81) mm (t=1.182, P>1.182) to the limbus. Conclusion The detection rate of ocular foreign body by MSCT three-dimensional reconstruction was high and with high accuracy rate, which had important value for the localization of ocular foreign body.