lobar collapse on CXR

Schematic drawings depicting frontal and lateral views of chest radiographs of acute and nearly complete lobar atelectasis that result from absorptive mechanisms of collapse. Dark shading indicates the airless and contracted collapsed lobes. Large arrows indicate zones of typically indistinct radiographic margins of the atelectatic tissues (stippled pattern). Figure courtesy of Marini JJ. Acute lobar atelectasis. Chest. Published Online: December 5, 2018 (doi: https://doi.org/10.1016/j.chest.2018.11.014).