Figure 2From: Acute fibrinous and organising pneumonia: a case report and review of the literature High-resolution computed tomography (HRCT) at presentation at the level of the lower pulmonary veins (A) and lower lobes (B) at lung windowing shows a ring-like opacity (arrowhead) and subpleural band-like opacity (arrow) with ground-glass in the centre of them consistent with the "reversed halo sign".Back to article page