Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . There is heterogeneous opacification in each mid to lower lung and each hilum is mildly enlarged . This is probably due to enlargement of pulmonary vessels in association with mild vascular congestion . Confluent opacification obscuring the left cardiac border suggests pneumonia in the lingula , although pneumonia might not be confined to this area .
    OUTPUT:
    
Findings suggest pneumonia in the appropriate , most well defined in the lingular region , with coinciding suspicion for mild vascular congestion .