低剂量联合迭代技术在喉部CT成像中的临床应用  

Clinical application of low dose with iterative technique in CT imaging of larynx

作　　者：张任华[1] 邓波红[1] 龙江涛[1] 黄和平[1] 何琛波 

机构地区：[1]湖南省郴州市第一人民医院医学影像中心,湖南郴州423000

出　　处：《中国临床医学影像杂志》2017年第8期584-587,共4页Journal of China Clinic Medical Imaging

摘　　要：目的:探讨低辐射剂量联合自适应迭代重建技术(ASi R)在喉部CT成像中的临床应用价值。方法:220例患者的喉部CT扫描分为两组:常规剂量滤波反投影重建组(FBP组)和低辐射剂量联合ASiR50%重建组(ASi R50%组),每组各110例。所有重建图像传送至AW 4.6工作站进行后处理,分别由3名影像医师采用双盲法对两组影像质量进行评价,采用t检验对两组辐射剂量及图像质量进行比较。结果:ASiR50%组显著降低了辐射剂量(P<0.001),CTDIvol、DLP、Total DLP和m Sv的降低率分别为80.22%(6.65/8.29)、82.95%(78.61/94.77)、82.95%(157.23/189.54)和83.04%(0.93/1.12)。FBP与ASi R50%组图像质量显示能力的比较差异无统计学意义(P>0.05)。结论:低辐射剂量联合ASi R50%重建技术在保证图像质量的基础上,显著降低了辐射剂量。Objective： To explore the clinical application value of low radiation dose with adaptive statistical iterative re-construction （ASiR） technique in CT imaging of larynx. Methods： Larynx CT scans of 220 patients were classified into 2 groups： FBP group （underwent routine dose filtered back projection, FBP）, and ASiR50% group （underwent low dose with ASiR50%）, 110 cases each. The data of all patients were transmitted to the workstation（AW 4.6）, and were evaluated by three doctors with double-blind method. A t test was used to compare 2 groups of radiation dose and image quality evaluated. Re-sults： ASiR50% group could obtain reduced the radiation dose （P〈0.001）. CTDIvol, DLP, Total DLP and mSv reduced the rate of 80.22%（6.65/8.29）, 82.95%（78.61/94.77）, 82.95%（157.23/189.54） and 83.04%（0.93/1.12）. Between ASiR50% and FBP group, there was no statistically significant difference shows ability of image quality （P〉0.05）. Conclusion： Low radiation dose with ASiR50% on the basis of guarantee the quality of image reconstruction technology can significantly reduce the radiation dose.

关 键 词：喉疾病 体层摄影术 X线计算机 

分 类 号：R767.1[医药卫生—耳鼻咽喉科] R814.42[医药卫生—临床医学]