眼眶CT扫描应用第二代双源CT低管电压配合SAFIRE重建技术的价值分析  

Value of Second-generation Dual-source CT Low Voltage and SAFIRE Reconstruction Technique in Orbital CT Scanning

作　　者：贺新 刘宁 HE Xin;LIU Ning(Department of Ophthalmology, Chinese Traditional Medicine Hospital of Yili Autonomous Prefecture, Xinjiang Uygur Autonomous Region 835000,China)

机构地区：[1]新疆伊犁州中医医院眼科

出　　处：《中国CT和MRI杂志》2019年第7期32-34,共3页Chinese Journal of CT and MRI

基　　金：新疆维吾尔自治区自然科学基金资助项目(200821115)

摘　　要：目的分析第二代双源CT低管电压配合SAFIRE重建技术在眼眶扫描中的应用价值。方法研究对象为2018年1月-2018年8月在本院行眼眶CT扫描的300例疑似眼眶病变患者,将其按管电压参数分为对照组(管电压:120kV,n=98)、低管电压组(100kV,n=202),回顾性分析其眼眶CT扫描结果,与临床诊断对照,比较其诊断价值;并比较两组平均CT值、图像噪声(SD)、信噪比(SNR)、对比噪声比(CNR),有效剂量(ED)、图像质量。结果与临床诊断结果对照,两组诊断符合率及视神经、眶内脂肪、背景(空气)CT值、图像质量比较差异虽无统计学意义(P>0.05);但低管电压组SD、ED显著低于对照组,SNR、CNR显著高于对照组(P<0.05)。结论眼眶CT扫描应用第二代双源CT低管电压配合SAFIRE重建技术或可在降低辐射剂量基础上,确保图像质量,值得临床重视。Objective To analyze the application value of second-generation dual-source CT low voltage combined with SAFIRE reconstruction technique in orbital scanning.Methods 300 patients with suspected orbital lesions who underwent orbital CT in the hospital from January 20 to August 2018 were selected as study subjects. They were divided into the control group(tube voltage of 120 kV, n=98) and low tube voltage group(100 kV, n=202) according to the tube voltage. The orbital CT scan results were analyzed retrospectively and compared with clinical diagnosis. Its diagnostic value was analyzed.The average CT value, image noise(SD), signal to noise ratio(SNR), contrast noise ratio(CNR), effective dose(ED) and image quality were compared between the two groups. Results Compared with the clinical diagnosis, there was no statistically significant difference between the two groups in the diagnostic coincidence rate, CT values of optic nerve, intraorbital fat and background(air) or image quality(P>0.05). SD and ED of the low voltage group were significantly lower than those of the control group, while SNR and CNR were significantly higher than the control group(P<0.05). Conclusion The application of second-generation dual-source CT low voltage combined with SAFIRE reconstruction technique in orbital CT scan may ensure the image quality and reduce the radiation dose.

关 键 词：眼眶CT扫描 第二代双源CT 低管电压 SAFIRE重建技术 

分 类 号：R777.5[医药卫生—眼科]