Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . There is a retrocardiac opacity obscuring the left hemidiaphragm , suggesting a consolidation in the left lower lobe . Air bronchograms are noted within the opacity . Elsewhere , the lungs appear clear . There are no pleural effusions or pneumothorax .
    OUTPUT:
    
Findings most consistent with consolidative pneumonia in the left lower lobe . Followup radiographs are recommended to show resolution after treatment in approximately eight weeks .