Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patchy left base opacity is seen , more conspicuous on 1 of the frontal views than the other , underlying infection or aspiration not excluded although findings may relate to atelectasis . The right lung is clear . Overall , the lungs are hyperinflated . The cardiac and mediastinal silhouettes are stable . No pulmonary edema is seen .
    OUTPUT:
    
Patchy left base opacity is seen , more conspicuous on 1 of the frontal views than the other , underlying infection or aspiration not excluded although findings may relate to atelectasis