应用放大重建高分辨CT显示新型冠状病毒肺炎CT征象的价值  

Application of Target Reconstruction High-resolution CT to Show CT Signs of Corona Virus Disease 2019

作　　者：马春[1] 明兵[1] 惠庆桃[1] 王晓玲 谢冬梅 李裕丹 MA Chun;MING Bing;HUI Qing-tao;WANG Xiao-ling;XIE Dong-mei;LI Yu-dan(Department of Radiology,People’s Hospital of Deyang City,Deyang 618000,Sichuan Province,China)

机构地区：[1]德阳市人民医院放射科,四川德阳618000

出　　处：《罕少疾病杂志》2021年第5期24-26,共3页Journal of Rare and Uncommon Diseases

基　　金：德阳市“新型冠状病毒感染肺炎”防治技术研发项目(FY202006)。

摘　　要：目的探讨放大重建高分辨CT提高新型冠状病毒肺炎(COVID-19)征象显示质量的价值。方法对胸部进行常规高分辨CT扫描,应用扫描后的原始数据进行放大重建,重建FOV为100mm×100mm,层厚及层间距保持一致。对放大重建高分辨CT与常规高分辨CT图像单纯放大后显示COVID-19 CT征象能力进行主观评分,并对两组图像噪声进行主观评价及客观测量。对主观评价数据进行秩和检验,对客观测量数据进行t检验。结果常规重建高分辨CT单纯放大后评价COVID-19 CT征象评分均低于放大重建高分辨CT图像(P<0.001)。常规重建高分辨CT图像噪声(51.7±25.7)低于放大重建高分辨CT图像(61.2±29.9),差异无统计学意义(t=1.162,P=0.251)。主观图像噪声评分放大重建高分辨CT图像高于单纯放大常规重建高分辨CT图像(Z=4.123,P<0.001)。结论放大重建高分辨CT较单纯放大常规重建高分辨CT有更高空间分辨率,可以更好地显示COVID-19的CT征象细节。Objective To investigate the value of target reconstruction high-resolution CT to improve the quality of the Coronavirus disease 2019(COVID-19)CT feature.Methods A conventional high-resolution CT scan of the chest was conducted,and the reconstructed FOV was 350mm×350mm with a matrix of 512×512.The raw data was used for target high-resolution CT reconstruction with reconstructed FOV of 100mm×100mm and the matrix of 512×512.The slice thickness and interval were kept the same.Three senior professional diagnostic radiographers subjectively scored the ability to display COVID-19 CT signs of the target reconstruction of high-resolution CT and magnified conventional high-resolution CT images.Subjective evaluation and objective measurement of image noise of the images of the two groups were conducted.Rank sum test was performed on subjective evaluation data,and t test was used on objective measurement data.Results The scores of the COVID-19 CT signs of magnified conventional reconstructed high-resolution CT images were lower than those of target reconstruction high-resolution CT images(P<0.001).The noise of magnified conventional reconstructed high-resolution CT images(51.7±25.7)was lower than that of target reconstructed high-resolution CT images(61.2±29.9),and the difference was not statistically significant(t=1.162,P=0.251).The subjective image noise score was higher in target reconstructed high-resolution CT images than that of magnified conventional high-resolution CT images(Z=4.123,P<0.001).Conclusion The high-resolution CT with target reconstruction has higher spatial resolution than the magnified conventional reconstruction high-resolution CT,which can better demonstrate the CT signature details of COVID-19.

关 键 词：新型冠状病毒肺炎 体层摄影术 X线计算机 图像质量 对比研究 

分 类 号：R563.1[医药卫生—呼吸系统] R445.3[医药卫生—内科学]