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J Korean Radiol Soc. 1972 Mar;8(1):7-9. Korean. Original Article.
Yoo HJ .

The perception of abnormal shadows is fundamental to roentgenological diagnosis. A lesion must be greater thancertain limits in size to be roentgenologically visible. On the other hand, considerably larger lesions may frequently escape from being detected when they are located in so-called blind areas of the lung fields. There seems to be relatively a high intraobserver and interobserver error in detecting and describing abnormal pulmonary shadows. On this occasion, a brief comment has been made on the variability and limitation in perception of pulmonary lesions as well as on the advantages and shortcomings of dual interpretation. A few measures which maybe of value in reducing the undesired unreliability of chest X-ray interpretation has also been shortly discussed.

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