Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Moderate cardiomegaly is unchanged . The lungs are hyperinflated with a hyperlucent appearance compatible with known COPD . Increased opacity in the left lower lobe may reflect pneumonia versus atelectasis . No large effusion or pneumothorax is seen . There may be a tiny left pleural effusion given blunting on lateral projection . Mediastinal contour stable . Aortic atherosclerotic calcification noted . Imaged bony structures appear grossly intact .
    OUTPUT:
    
Stable cardiomegaly , subtle left lower lobe opacities , which may represent atelectasis versus pneumonia . Possible tiny left pleural effusion .