中国临床医学影像杂志2025，Vol.36Issue(3)：189-193,204,6.DOI:10.12117/jccmi.2025.03.008
不同剂量CT联合不同模型图像重建算法在肺结节筛查中图像质量对比
Comparison of image quality in lung nodule screening using different doses of CT combined with image reconstruction algorithms for various models
摘要
Abstract
Objective:To explore the image quality of lung nodule screening using different doses of CT combined with image reconstruction algorithms for various models.Methods:This prospective study selected 120 patients with pulmonary nodular diagnosed and treated at Xinxiang Central Hospital from January 2022 to May 2024 as the study objects.Low-dose CT and ultra low-dose CT scans were performed on the patients respectively.The scanning conditions of the low-dose were 120 kV and the current was 30 mA,while the scanning conditions of the ultra low-dose were 120 kV and the current was set to 10 mA.In the process of scanning the above images of the patient by 64-slice spiral CT scan,the imaging of the patient was reconstructed by FBP,IMR and iDose respectively.To compare the differences between the subjective quality,objective quality,spatial resolution,density resolution and uniformity of imaging images of patients with pulmonary nodules with different doses of CT combined with image reconstruction algorithms for different models.Results:In the scanning process of patients,under the FBP and IMR modes,there was no statistically significant difference between the LCD,ID and DC of patients in the low-dose group and the ultra low-dose group(P>0.05).Under the iDose mode,the scores of LCD,ID and DC of patients in the ultra low-dose group were lower than those in the low-dose group(P<0.05).Under the FBP,IMR and iDose modes,CT values(t=301.143,340.289,487.821,P<0.05)and SD values(t=306.827,344.055,278.394,P<0.05)in the ultra low dose group were lower than those in the low dose group.SNR(t=92.062,99.698,135.266,P<0.05),CNR(t=41.755,45.244,32.220,P<0.05)were higher than those in low-dose group,FBP,IMR and iDose mode,under Routine,Soft and SharpPlus parameters,the spatial resolution,density resolution and uniformity of imaging images in the ultra low dose group were better than those in the low dose group.Conclusion:The subjective quality of images obtained from ultra-low dose CT scans combined with IMR shows minimal differences compared to other modes;however,its objective quality,spatial resolution,density resolution,and uniformity of images are significantly improved.关键词
肺肿瘤/体层摄影术,X线计算机Key words
Lung Neoplasms/Tomography,X-Ray Computed分类
医药卫生引用本文复制引用
马啸天,贾祯,栗鸿宝..不同剂量CT联合不同模型图像重建算法在肺结节筛查中图像质量对比[J].中国临床医学影像杂志,2025,36(3):189-193,204,6.基金项目
二〇二三年度河南省医学科技攻关计划项目(LHGJ20230879). （LHGJ20230879）
