Abstract
Mosaic attenuation pattern appears as patchwork of regions of differing attenuation that may represent (a) patchy interstitial disease, (b) obliterative small airway disease, or (c) occlusive vascular disease [1, 2]. Mosaic attenuation pattern caused by the latter two disease categories is called mosaic perfusion (Figs. 13.1 and 13.2). The combination of mixed lung attenuations (combination of ground-glass opacity, normal lung, and reduced lung attenuation as a result of mosaic perfusion) often gives the lung a geographic appearance and has been termed the head-cheese sign.
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Lee, K.S., Han, J., Chung, M.P., Jeong, Y.J. (2014). Decreased Opacity without Cystic Airspace. In: Radiology Illustrated: Chest Radiology. Radiology Illustrated. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-37096-0_13
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