Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A very small suspicious focal opacity at the right lung base is indeterminate for lung infection . The rest of the lungs are clear . No pleural effusion . The mediastinal and hilar contours are normal .
    OUTPUT:
    
Suspicious focal opacity at the right lung base is indeterminate for infection . Followup CT at four weeks is recommended to assess for interval change .