Effects of luminance and resolution on observer performance with chest radiographs
Effects of luminance and resolution on observer performance with chest radiographs
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DOI：
10.1148/radiology.215.1.r00ap34169
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发表时间：
2000-04-01
期刊：
影响因子：
19.7
通讯作者：
Gur, D
中科院分区：
文献类型：
--
作者：
Herron, JM;Bender, TM;Gur, D
目得：检查图像分辨率和显示亮度对观察者检测后前位胸片异常表现的综合影响。材料和方法：共有529张X线照片显示在一个特殊构造的视图框在三个亮度水平（770、260和85 cd/m（2））和三种分辨率（100 μ m、200 μ m和400 μ m像素）。每个图像由参与本研究的6名放射科医生审查9次。异常包括结节、气胸、间质性疾病、肺泡浸润和肋骨骨折。结果：受试者工作特征曲线表明图像亮度的影响大于分辨率的影响。气胸、间质性疾病和肋骨骨折的检测由于亮度而显示出统计学上的显著差异（P <0.05）。气胸的检测是唯一的异常，由于消退而具有统计学显著性差异。没有证据表明亮度与图像分辨率有关的任何abnorm.CONCLUSION：在分辨率为400 μ m像素或更高的视野和亮度为260 cd/m（2）或更高，初步诊断与后前位胸片是不太可能受到影响的显示质量。
PURPOSE: To examine the combined effects of image resolution and display luminance on observer performance for detection of abnormalities depicted on posteroanterior chest radiographs.MATERIALS AND METHODS: A total of 529 radiographs were displayed on a specially constructed view box at three luminance levels (770, 260, and 85 cd/m(2)) and three resolutions (100-mu m, 200-mu m, and 400-mu m pixels). Each image was reviewed nine times by six radiologists who participated in this study. The abnormalities included nodule, pneumothorax, interstitial disease, alveolar infiltrates, and rib fracture. Negative (normal) radiographs were also included.REULTS: Receiver operating characteristic curves indicated that the effect of image luminance was greater than that of resolution. The detection of pneumothorax, interstitial disease, and rib fracture showed statistically significant differences (P < .05) due to luminance. The detection of pneumothorax was the only abnormality with a statistically significant difference due to resolution. There was no evidence that luminance was related to image resolution for any of the abnormalities.CONCLUSION: At a resolution of 400-mu m pixels or higher across the field of view and a luminance of 260 cd/m(2) or more, primary diagnosis with posteroanterior chest radiographs is not likely to be affected by the quality of display.