Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Subtle opacity at the left lung may be due to atelectasis although subtle infection is not excluded in the appropriate clinical setting . There is persistent apparent blunting of the right costophrenic angle on the frontal view , chronic . Cardiac and mediastinal silhouettes are stable . No pulmonary edema is seen . Vertebral body heights are grossly stable in appearance . No displaced fracture is identified .
    OUTPUT:
    
Subtle left base opacity may be due to combination of atelectasis and epicardial fat , however , subtle consolidation is not excluded in the appropriate clinical setting . No displaced fracture seen .