3M和5M显示器对不同分辨率乳腺影像图中微钙化识读的影响

Effects of 3-megapixel and 5-megapixel Monitors on Detecting Micro-calcification in High-and Low-resolution Breast Images

通过使用高、低两种分辨率的乳腺影像图来比较3M与5M医用专业显示器对乳腺微钙化识读的影响。选择高、低两种分辨率的乳腺影像图各100例(各含微钙化病例40例、正常对照病例60例)。由1名高年资和1名低年资放射科医师评估两种显示器对乳腺微钙化的显示率,识别效能用ROC曲线判断,并使用Kappa分析检验两名医生的判读一致性。在低分辨率影像图组中,两名医生在3M与5M医用专业显示器上对微钙化的识别效能相同(P=0.451及0.559);在高分辨率影像图组中,高年资医生使用5M医用专业显示器对乳腺微钙化的识别率明显高于3M(P=0.022),低年资医生的识别率无显著差异(P=0.141)。两名医生在5M显示器上判读的一致性都好于3M显示器,在5M显示器上判读高分辨率影像图时,两名医生的判读有极好的一致性(K=0.862)。因此,对不同分辨率的乳腺影像图,应配套相应分辨率的显示器,高年资医师识读高分辨率影像图组时应配套5M显示器更利于微钙化的检出。

To evaluate the influence of 3- and 5-megapixel medical professional monitors in detecting the micro-calcifi- cations on high- and low-resolution breast images, we performed a retrospective study in low- （n= 100） and high- resolution （n= 100） data, including 40 micro-calcification patients in a group and 60 normal ones in control group re- spectively. Two doctors, one junior, and the other senior, reviewed all the images without knowing the clinical data and histology, and their observations of each image with different monitors were calculated. The areas under the ROC curves （Az） were compared. Finally, the interpretation consistency of the two doctors was assessed using Kap- pa analysis. In the low resolution data group, the two doctors＇ detection performance of breast micro-calcifications were very similar in the 3M and 5M medical professional monitors （P=0. 451 and 0. 559）. In the high resolution group, however, the senior doctor＇s recognition rate on the 5M monitor was significantly higher than that on the 3M （P=0. 022）, while the junior＇s recognition rate had no significant difference （P=0. 141） between the two readings. The two doctors＇ interpretatiorx consistency on 5M monitowas better than that on 3M monitor. For the high-resolu- tion images on the 5M monitor, the interpretation of the two doctors had extremely great consistency （K=0. 862）. Therefore, different breast images of different resolutions should match corresponding resolution monitor. Interpre- tation of high-resolution images with 5M monitor has more advantages in the micro-calcification detection for senior doctors.