Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are normal . Subtle opacity in the right middle lobe may represent an early pneumonia . The left lung is clear . No pleural effusion or pneumothorax is seen . Lucent lesion in the right perihilar region , likely represents a bulla in the right middle lobe . No acute osseous abnormality is evident .
    OUTPUT:
    
Possible early / focal RML pneumonia . Consider follow up CXR in 4 weeks after treatment to ensure resolution . The findings were discussed with Dr .___ ___ telephone at 9 : 15 A . M on ___ .