Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previously seen opacity in the left mid lung field is no longer identified on this radiograph . There are no new parenchymal opacities , pleural effusion or pneumothorax . Cardiomediastinal silhouette is normal . There are no acute bony abnormalities .
    OUTPUT:
    
Resolved pneumonia in the left mid lung and no new opacity identified .