Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Subtle heterogeneous opacity in the right lower lobe could reflect pneumonia in the appropriate clinical situation . Small amount of left lower lobe atelectasis . No pleural effusion or pneumothorax . The heart is normal in size . Aortic knob calcifications are unchanged . No acute osseous abnormality . Left - sided pacemaker wires are unchanged with 1 tip projecting over the right atrium and the other over the right ventricle .
    OUTPUT:
    
Subtle heterogeneous opacity of the right lower lobe could reflect pneumonia or aspiration in the appropriate clinical situation . Short term follow - up radiograph may be helpful to ensure resolution .