1 Cleveland Clinic and.
2 Thoracic Imaging Section, Imaging Institute, Cleveland Clinic, Cleveland, Ohio.
Ann Am Thorac Soc. 2015 Jun;12(6):928-31. doi: 10.1513/AnnalsATS.201412-576AS.
Pneumothorax can be a critical medical condition. The radiographic curvilinear appearance of pneumothorax can be mimicked by a skinfold artifact. Radiographic differentiation of the two entities is achieved in most cases by careful analysis of the characteristics of the linear shadow and its course. A thin, sharply defined opaque density representing the visceral pleura is the hallmark of pneumothorax. The added density of a skinfold presents as a broad opacity, which is outlined laterally by a sharply defined lucent line as a result of the Mach band effect and adjacent air. Unlike pneumothorax, a skinfold produces a line that does not follow the expected course of visceral pleura. Additional features, such as the absence of increased lucency laterally and the projection of lung markings across the curvilinear shadow, can help in the correct identification of skinfolds. Repeating the chest radiograph or using other imaging modalities can be considered in difficult cases.
气胸可能是一种危急的医疗状况。气胸的放射曲线外观可能会被皮肤褶皱伪影模拟。在大多数情况下，通过仔细分析线性阴影及其走向的特征，可以实现这两种情况的放射鉴别。代表脏层胸膜的薄而清晰的不透明密度是气胸的标志。皮肤褶皱的附加密度表现为广泛的不透明，由于马赫带效应和相邻空气的作用，在侧向由清晰的透明线勾勒出。与气胸不同，皮肤褶皱产生的线不会遵循脏层胸膜的预期走向。其他特征，如侧向没有增加的透明度以及肺标记物穿过曲线状阴影的投影，可以帮助正确识别皮肤褶皱。在困难的情况下，可以考虑重复胸部 X 光检查或使用其他成像方式。
