Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: New opacity in the lingula is worrisome for pneumonia . The remaining lung fields are clear and normally expanded . The heart is not enlarged . The mediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Lingular pneumonia . Followup radiographs in ___ weeks after treatment are recommended to confirm resolution .