应用CDRAD 2.0模体定量评价DR成像的密度分辨力  

Quantitative evaluation of density resolution of DR images with CDRAD 2.0 phantom

作　　者：李娟[1] 胡志海[1] 贺文[1] 

机构地区：[1]首都医科大学附属北京友谊医院放射科,北京100050

出　　处：《中国医学影像技术》2011年第10期2146-2148,共3页Chinese Journal of Medical Imaging Technology

摘　　要：目的应用CDRAD 2.0模体对数字影像(DR)的密度分辨力进行定量评价。方法用两台Philips DR机对CDRAD 2.0模体进行数字化成像,设备1投入使用时间为7年,设备2使用时间为17个月。用匹配软件处理数据资料,计算IQFinv值,比较两台设备的密度分辨力差异。结果设备1的IQFinv均值为2.31,设备2的IQFinv均值为2.81,二者差异有统计学意义(t=7.855,P<0.01)。结论采用CDRAD 2.0模体可定量分析DR设备的密度分辨力。Objective To evaluate the density resolution of digital radiology（DR） system subjectively by using CDRAD 2.0 phantom.Methods Digital radiograms of CDRAD 2.0 phantom were obtained by two Philips DR system（Unit 1 and Unit 2）,the using time of which was 7 years and 17 months,respectively.The image data were analyzed with the processing software of the phantom.IQFinv value defined in a formula was calculated of each modality.Results IQFinv value of Unit 1 was 2.31,that of Unit 2 was 2.81.There was statistical difference between the two units（t=7.855,P0.01）.Conclusion The density resolution of DR can be quantitatively evaluated using CDRAD 2.0 phantom.

关 键 词：CDRAD 2.0 密度分辨力 放射摄影术 

分 类 号：R814[医药卫生—影像医学与核医学]