Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Indistinct increased opacity in the left midlung field could represent infection or aspiration in the proper clinical circumstances . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
Indistinct increased opacity at the left mid lung field may represent infectious process or aspiration , depending on the clinical setting . If patient disease antibiotics , followup radiographs in ___ weeks are recommended to ensure resolution .