Increasing prominence of air space opacities in the right upper and mid lung zones, and the left lower lung near the costophrenic sulcus, which may represent infection. The differential diagnosis includes pulmonary infarction, eosinophilic pneumonia, and bronchiolitis obliterans organizing pneumonia (BOOP). Further evaluation with a chest CT without contrast is suggested.
Air space opacity–multifocal (Uncertain) Pneumonia (Uncertain)