Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is increased obscuration of the left hemidiaphragm with a more prominent retrocardiac left lower lobe airspace opacity and a corresponding abnormality projecting over the spine posteriorly on the lateral radiograph . The lungs are hyperinflated with a paucity of vessels in the apices , suggestive of emphysema . The right lung is clear . A right pectoral pacemaker sends leads to the right atrium and right ventricle . There is no pneumothorax . The heart and mediastinum are within normal limits . Bones and soft tissues are unremarkable . Old healed right rib fractures are incidentally noted .
    OUTPUT:
    
Left lower lobe pneumonia .