Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . A heterogeneous opacity in the posterior left lower lobe is worrisome for pneumonia in the correct clinical setting . This less likely represents atelectasis . Right hemidiaphragm elevation is stable . Pacemaker leads end in the right atrium and right ventricle . Sternotomy wires are in appropriate position . Cardiomegaly is stable . There are no pleural effusions or pneumothorax . No pulmonary vascular congestion .
    OUTPUT:
    
1 . Left lower lobe opacity worrisome for pneumonia in the right clinical setting , less likely atelectasis . 2 . No pulmonary vascular congestion . These findings were discussed with ___ on ___ at 3 :30 p .m . by telephone .