Fig. 4From: Pulmonary fibrosis on the lateral chest radiograph: Kerley D lines revisited68-year-old man with idiopathic pulmonary fibrosis. An axial CT slice (a) shows fibrosis at the lung bases. On the lateral radiograph (b), reticular opacities are seen in the retrosternal clear space but not at the lung bases, where they are obscured by pulmonary vasculature and the spine. A corresponding sagittal CT slice (c) is also shownBack to article page