摘要 目的探讨超高分辨CT(U-HRCT)靶重建在新型冠状病毒肺炎(COVID-19)精准诊断中的价值。方法回顾性分析13例COVID-19,44例其他肺炎,6例磨玻璃结节患者的CT图像,分为A组(C-HRCT)及B组(U-HRCT),分别采取iDose4-3、iDose4-5进行回顾性靶重建,评估不同重建图像在同一层面肺窗的CT值、噪声(SD)、信噪比(SNR);2名影像学医师以5分制对图像质量及显示病灶结构进行主观评分。结果同一选代等级,U-HRCT图像的SNR低于C-HRCT图像,SD高于C-HRCT图像,差异有统计学意义(P<0.05)。二元logistic回归分析显示磨玻璃病灶内血管增粗、病灶胸膜下分布、小叶间隔显示和铺路石征象是判断COVID-19的独立预测因子。U-HRCT对磨玻璃病灶内血管增粗、支气管管壁及小叶间隔显示上优于C-HRCT,差异有统计学意义(P<0.05)。结论U-HRCT在诊断COVID-19较C-HRCT有优势,特别是在显示病灶关键细节方面。 Objective To investigate the value of target reconstruction of ultra-high-resolution computer tomography(U-HRCT)in the accurate diagnosis of novel coronavirus pneumonia(COVID-19).Methods The CT images in 13 cases of COVID-19,44 cases of other pneumonia and 6 cases of ground-glass nodules were retrospectively analyzed.The data were divided into group A[conventional HRCT(C-HRCT)]and B(U-HRCT).iDose4-3 and iDose4-5 were respectively used for conducting the retrospective target.The CT value,noise(SD)and signal-to-noise ratio(SNR)in the same layer lung window of different reconstruction images were evaluated.The two senior professional doctors of imaging conducted the subjective scoring on the image quality and the structure of the lesions by adopting the 5-point system.Results SNR of U-HRCT image was lower than that of C-HRCT image at the same iteration level,SD of U-HRCT image was higher than that of C-HRCT image,and the differences were statistically significant(P<0.05).The binary logistic regression analysis showed that the blood vessels thickening in the ground glass lesions,lesions subpleural distribution,interlobular septum thickening and signs of paving stones were the independent predictors for judging COVID-19.U-HRCT was superior to C-HRCT in showing the blood vessels thickening,bronchial wall and interlobular septum thickening in the ground-glass lesions,and the difference was statistically significant(P<0.05).Conclusion U-HRCT has an advantage over C-HRCT in diagnosing COVID-19,especially in the aspect of displaying the key details of the lesion.
出处 《重庆医学》 CAS 2021年第7期1156-1161,共6页 Chongqing medicine
关键词 超高分辨CT 1024矩阵 靶重建 新型冠状病毒肺炎 诊断 ultra high resolution computer tomography 1024 matrix targeted reconstruction Corona Virus Disease 2019 diagnosis
