【摘要】 目的:比较双能减影和常规DR对肺结节或肿块检出的能力。方法:对经CT证实的50例患者共104个肺结节或肿块(PNM)行双能减影(DES)和常规数字X线减影(CDR)检查。评价DES和CDR对PNM的检出能力,并用配对卡方检验进行差异显著性分析。结果:对于CT证实全部PNM,DES和CDR的检出率分别为67.3%(70/104)和52.9%(55/104),两者差异有极显著性意义(χ2=9.33,P<0.01)。对于最大径>1 cm的PNM,DES和CDR的检出率分别为91.5%(43/47)和89.4%(42/47),两者差异无显著性意义(χ2=1,P>0.05)。对于最大径≤1 cm的PNM,DES和CDR的检出率分别为47.4%(27/57)和22.8%(13/57),两者差异有极显著性意义(χ2=8.45,P<0.01)。结论:DES对PNM的检出能力优于CDR。更多还原

【Abstract】 Objective:To compare the detectability of dual energy subtraction and conventional digital radiography in detecting pulmonary nodules or masses(PNM).Methods:104 PNM of 50 patients which were demonstrated by CT were examined by DES and CDR.The detectability of dual energy subtraction and conventional digital radiography was estimated respectively.Results:For the overall PNM,the detectability of DES was 67.3%(70/104) and that of CDR was 52.9%(55/104),there was significant difference between the two methods(χ2=9.33,P<0.01).For those PNM whose maximal diameters were larger than 1cm,DES and CDR found 91.5%(43/47)and 89.4%(42/47) respectively,there was no significant difference between the two methods(χ2=1,P>0.05).For those PNM whose maximal diameters were 1cm or less,the detectability of DES and CDR were 47.4%(27/57) and 22.8%(13/57) respectively,there was significant difference between the two methods(χ2=8.45,P<0.01).Conclusion:The performance of DES was superior to that of CDR in detecting PNM.更多还原