Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a focal opacity in the lingula . Otherwise , the remainder of the lungs are clear . Cardiac silhouette is normal . There is no evidence of an effusion or pneumothorax . No acute fractures identified .
    OUTPUT:
    
Lingular opacities most likely representing pneumonia . Other etiologies are not excluded and a followup chest radiograph in 6 weeks is recommended to ensure resolution .