应用统计学体模评价显示器分辨率对于乳腺病变诊断的影响

目的:通过使用ALVIM乳腺体模,来评价医用显示器的空间分辨率差异是否会影响乳腺早期病灶的检测。方法:采用全数字化乳腺DR系统(Mammomat Novation,DR),对于ALVIM统计学乳腺摄影体模TRM进行摄影。乳腺体模使用Al2O3斑点模拟钙化灶,尼龙纤维模拟肿块灶。两名放射科医生使用单色医用CRT显示器MGD 221 MKⅡ和MGD 521M分两次进行阅片,并对乳腺模拟病灶进行评估。结果:高分辨率和低分辨率医用CRT显示器在检测乳腺模拟病灶的性能上没有显著性差异。但高分辨率显示器的检测性能略优于低分辨率显示器。结论:高分辨率的医用CRT显示器(5M)和低分辨率的医用CRT显示器(2M)在显示乳腺早期病灶时,都能够提供符合临床诊断要求的影像信息,可以使用较低空间分辨率的医用显示器来浏览乳腺影像。

Effect of Monitor Resolution on the Diagnosis of Breast Lesions By Using ALVIM Statistics Phantom

Objective:To evaluate the effect of monitor resolution on the diagnosis of breast lesions by using ALVIM statistics phantom.Methods: ALVIM statistics phantom consists of Al2O3 mottles(calcification) and nylon fiber signals(tumor) various in size was used in this study.The test image was acquired with the digital system(Mammomat Novation DR.Two radiologists interpreted the image with high resolution and low resolution CRT monitors.Result: Results showed no significant difference in observer performance between the high resolution monitor and low resolution monitor.Conclusion: The low resolution CRT monitor could be used to interpret the breast images,although the performance of low resolution monitor was inferior to that of high resolution monitor.