Chronic airspace disease: Review of the causes and key computed tomography findings

Figure 3 Organizing pneumonia. A: Contrast-enhanced computed tomography (CT) of the chest in lung window in a 52-year-old woman with rheumatoid arthritis presenting with chest pain and shortness of breath. CT was negative for pulmonary embolism but showed pleural-based patchy opacities and consolidations (arrows); B: Follow-up chest CT after 3 mo showed persistent pleural-based opacities in the lungs (arrows). Suture material is seen in the right lobe opacity (arrowhead), in keeping with post-biopsy changes, which confirmed organizing pneumonia; C: Axial CT image more superiorly demonstrated development of a new area of ground glass opacity with a rim of more solid consolidation (reverse halo sign) as well as secondary to organizing pneumonia (arrow).