Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . An opacity in the right lower lung field obscuring the right heart border is new compared with prior exam . Opacities are mostly in the right middle lobe although there is also coinciding right lower lobe subpleural opacity . The remaining lung parenchyma is unremarkable . There is no pleural effusion or pneumothorax . Mild cardiomegaly stable . A single - lead pacemaker in the left hemithorax is unchanged .
    OUTPUT:
    
Findings consistent with pneumonia . Follow - up radiographs are recommended to show resolution within eight weeks .