Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild left base atelectasis / scarring is seen . Right upper and mid to lower lung streaky linear opacities have improved in the interval . Left mid lung opacities have also improved . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Previously seen pulmonary opacities have improved in the interval . Left base atelectasis / scarring .