Liddell F D
Br J Ind Med. 1977 May;34(2):85-94. doi: 10.1136/oem.34.2.85.
Problems in the assessment of small opacities, within the ILO U/C International Classification of Radiographs of the Pneumoconioses (International Labour Office, 1972), are discussed in the light of readings by three experts of a group of films in which both rounded and irregular small opacities frequently coexisted. There was considerable disagreement on whether opacities were rounded or irregular, but reasonable agreement on type (diameter or thickness). As expected, rounded opacities were more commonly recorded in upper zones of the lung, and irregular opacities in lower zones. However, determination of which zones were affected left much to be desired. Perhaps as a result, major problems arose over the assessment of combined profusion.
根据三位专家对一组X光片的判读情况，讨论了国际劳工组织（ILO）U/C尘肺病X光片国际分类（1972年）中关于小阴影判定的问题。在这组X光片中，圆形和不规则形小阴影常常同时存在。对于阴影是圆形还是不规则形，专家们存在很大分歧，但在类型（直径或厚度）方面有合理的共识。正如预期的那样，圆形阴影在肺上部区域更常见，不规则阴影在肺下部区域更常见。然而，确定哪些区域受到影响仍有很大不足。也许正因如此，在综合密集度的判定上出现了重大问题。
