不同分辨率单色液晶显示器与临床应用价值的分析  

Analysis on Monochrome LCDs with Different Resolutions and the Value of Clinical Application

作　　者：尹建东[1] 洪洋[2] 沙宪政[3] 郭启勇[1] 

机构地区：[1]中国医科大学附属盛京医院影像科,辽宁沈阳110004 [2]中国医科大学物理学教研室,辽宁沈阳110001 [3]中国医科大学生物医学工程教研室,辽宁沈阳110001

出　　处：《中国医学物理学杂志》2010年第2期1810-1813,共4页Chinese Journal of Medical Physics

摘　　要：目的:评价不同分辨率的单色液晶显示器对胸部DR影像图上病灶检出效能和细节显示质量的影响。方法:从PACS中在线选取胸部DR影像图93幅,其中由阳性图38幅、疑诊图32幅、正常图23幅组成,将阳性病例按结节尺寸大小分为A、B两组,请高、中、低年资医师各3名在3种不同分辨率的显示器上3次独立读图。对于结节显示有无的评判采用5等分法:肯定有、可能有、不确定、可能无、肯定无,对于纹理显示质量优劣的评判采用3等分法:优、良和差。使用SPSS13.0对结果进行统计分析。结果:病灶检出效能:高年资医师使用2MP、3MP、5MP显示器识读A组结节时AUC分别为0.643、0.686、0.739,中年资为0.636、0.682、0.717,低年资为0.623、0.656、0.621;识读B组结节时高年资医师为0.813、0.832、0.846,中年资为0.773、0.824、0.838,低年资为0.763、0.773、0.833;不同放射诊断系统间病灶检出效能比较差异无统计学意义。细节显示质量:除在5MP显示器上高和中年资医师、高和低年资医师之间存在显著性差异(P<0.05)外,其他比较差异均无统计学意义。结论:对于结节检测效能而言,不同放射系统之间诊断效能相当;对于纹理显示质量而言,高年资的医师在5MP显示器上能得到更多的信息。Objective： Evaluate the influence of monochrome LCDs with different resolutions for the quality of detail imaging and detection performance of lesions. Methods： 93 DR chest images were selected from PACS on-line, including 38 positive cases, 32 suspected cases and 23 normal cases. The positive cases were divided into two groups A and B according the diameter of pulmonary nodules. Three of high-, mid- and low-experienced radiologists interpreted the 93 images on three types of displays independently. Each observer marked their confidence of the presence of pulmonary nodule with five-point rating scale ： （1）definitely absent, （2）probably absent, （3）possibly present, （4）probably present and （5）definitely present, and the visual quality of lung markings with three-point rating scale：0） excellent, （2）fine, （3） inferior. Software SPSS 13.0 was used to analyze the results. Results： For the detection performance of lesion, while detecting nodules of Group A, the areas under ROC curves were 0.643,0.686,0.739 on 2MP,3MP and 3MP display for high-experienced radiologist. Those were 0.636,0.682,0.717 for mid-experienced radiologist and 0.623,0.656~0.721 for low-experienced radiologist; while detecting nodules of Group B, those were 0.813,0.832,0.846 for high-experienced d radiologist, 0.773 ~0.824,0.838 for mid-experienced radiologist and 0.763 、 0.733,0.833 for low-experienced radiologist. There were no significant differences among detection performance of radiodiagnostic systems. For the quality of detail imaging, while interpreting the visualization of lung markings, the difference between high- and mid-experienced radiologist or between high- and low-experienced radiologist on 5MP display was conspicuous （P〈0.05）： But the differences of other comparisons did not reach the significant level. Conclusions： For the detection performance of pulmonary nodules, it is comparable among different radiodiagnostic systems; for the visualization of lung markings, high-experienced ra

关 键 词：分辨率 结节 纹理 单色显示器 

分 类 号：R445[医药卫生—影像医学与核医学]