Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is retrocardiac opacity silhouetting the medial hemidiaphragm compatible with consolidation and possible component of atelectasis . This was present on prior . Elsewhere , lungs are clear . The cardiomediastinal silhouette is stable . Median sternotomy wires are again noted . Free intraperitoneal air is noted below the right hemidiaphragm . PEG tube is new from prior .
    OUTPUT:
    
Left lower lobe consolidation likely due to combination of atelectasis and infection . Free intraperitoneal air . This could be related to recent PEG tube placement but clinical correlation is advised .