Samuel S, Kundel H L, Nodine C F, Toto L C
Pendergrass Diagnostic Imaging Laboratory, Department of Radiology, University of Pennsylvania School of Medicine, Philadelphia 19104-6086.
Radiology. 1995 Mar;194(3):895-902. doi: 10.1148/radiology.194.3.7862998.
To use the eye position recordings of observers as they read chest images to advance understanding of the mechanism of "satisfaction of search," a phenomenon in which the detection of one abnormality interferes with the detection of other abnormalities.
Eight radiologists examined chest images that contained simulated pulmonary nodules and native abnormalities. Accuracy in detecting nodules and native abnormalities and eye position, gaze duration, and total search time were recorded.
Nodule detectability was lower on native abnormality-containing images than it was on normal images (P < .005). Native-abnormality detectability was not negatively affected by the nodules. Most missed nodules were fixated; only those on images without native abnormalities, however, received prolonged visual attention.
The satisfaction of search phenomenon is an important source of error in the detection of subtle abnormalities but not of obvious abnormalities. Obvious abnormalities capture visual attention and decrease vigilance for more subtle abnormalities.
利用观察者阅读胸部图像时的眼位记录，以增进对“搜索满意”机制的理解，“搜索满意”是一种异常情况的检测会干扰其他异常情况检测的现象。
八位放射科医生检查包含模拟肺结节和自然存在的异常情况的胸部图像。记录检测结节和自然存在的异常情况的准确性以及眼位、注视持续时间和总搜索时间。
包含自然存在的异常情况的图像上结节的可检测性低于正常图像（P <.005）。自然存在的异常情况的可检测性未受到结节的负面影响。大多数漏检的结节被注视；然而，只有那些在没有自然存在的异常情况的图像上的结节才会受到长时间的视觉关注。
“搜索满意”现象是检测细微异常情况时错误的重要来源，但不是明显异常情况的错误来源。明显的异常情况吸引视觉注意力并降低对更细微异常情况的警惕性。
