眼眶容积测量中螺旋CT的应用及其准确性探讨  

Application and accuracy of spiral CT in the measurement of orbital volume

作　　者：孙满意 王波[1] 董海波 SUN Man-yi;WANG Bo;DONG Hai-bo(Department of Radiology, Li huili Hospital,Ningbo Medical Center,Ningbo, Zhejiang 315040, China)

机构地区：[1]宁波大学附属李惠利医院放射科

出　　处：《中华全科医学》2019年第10期1729-1731,共3页Chinese Journal of General Practice

基　　金：浙江省医药卫生科技计划项目(2017KY572)

摘　　要：目的探讨螺旋CT在测量眼眶容积中的应用及其准确性。方法选取2016年9月—2018年10月宁波市医疗中心李惠利医院收治的非眼科患者32例,64眼。对所有患者的双侧眼眶进行容积再现(volume rendering,VR)成像检查,将VR检测值水平作为对比金标准。同时对32例,64眼进行不同的层厚/层距:2mm/2mm、2mm/4mm、2mm/5mm、3mm/3mm及3mm/5mm参数进行螺旋CT横断位重建,并截图检查图像。分析64眼在不同层厚/层宽条件下的眼眶容积检测值水平和误差率范围;64眼在不同层厚/层宽条件下的眼眶容积检测准确性。结果 VR检测时,平均眼眶容积值水平为(22.9±2.6)cm^3。2mm/2 mm时检测眼眶容积值水平为(22.4±2.3)cm^3,与VR检测值差异无统计学意义(P>0.05),其他层厚/层距参数之下的眼眶容积值水平与VR检测值之间差异有统计学意义(均P<0.05)。以误差率<0.5%作为评估准确性的标准;在2mm/2mm条件下,准确率达到100.0%,其次为2mm/4 mm,准确率为89.1%,准确率最低的为3mm/5mm,准确率仅为10.9%,各组2mm/2mm差异有统计学意义(均P<0.05)。结论应用螺旋CT在层厚/层距设置为2mm/2mm时进行眼眶容积测量,其误差率最小,能够准确、客观地测量眼眶容积值水平,可参考其水平来评估相关病情的变化、转归及疗效。Objective To investigate the application and accuracy of spiral CT in the measurement of orbital volume. Methods A total of 32 non-ophthalmic patients(64 eyes) admitted to our hospital from September 2016 to October 2018 were selected. Volume Rendering(VR) imaging was performed on the bilateral orbits of all the patients, and the VR detection value level was used as the gold standard for comparison. At the same time, 32 cases and 64 eyes were reconstructed at different thickness/spacing: 2mm/2mm, 2mm/4mm, 2mm/5mm, 3mm/3mm and 3mm/5mm parameters by spiral CT, and the images were taken screenshots. The measurement level and error rate range of orbital volume of 64 eyes in different thickness/width conditions;Accuracy of orbital volume detection in 64 eyes under different thickness/width conditions. Results During VR detection, the average orbital volume value was(22.9±2.6) cm^3. At 2mm/2mm, the orbital volume value detected was(22.4±2.3) cm^3, which had no significant difference with VR detection value(P>0.05). There was statistically significant difference between orbital volume value level and VR detection value under other thickness/interval parameters(all P<0.05). To take the error rate <5% as the criterion of accuracy evaluation;under the condition of 2mm/2mm, the accuracy rate reached 100.0%, followed by 2mm/4mm,with the accuracy rate of 89.1%, and the lowest was 3mm/5mm, with the accuracy rate of 10.9%. The difference between groups was statistically significant(all P<0.05). Conclusion Spiral CT was used to measure orbital volume when the thickness/interval was set to 2mm/2mm, with the minimum error rate. The level of orbital volume can be accurately and objectively measured, and the changes, outcomes and curative effects of related diseases can be evaluated by referring to its level.

关 键 词：眼眶容积 螺旋CT 容积再现 准确性 

分 类 号：R814.42[医药卫生—影像医学与核医学]