Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear opacities overlying the left mid lung likely represents subsegmental atelectasis . No focal consolidation , pleural effusion , pneumothorax is seen . Heart size is normal . Hilar structures and cardiomediastinal silhouette are normal . Median sternotomy wires are visualized . Surgical clips overlying the left lateral chest wall are seen .
    OUTPUT:
    
Linear opacities overlying the left mid lung likely represents subsegmental atelectasis / scarring .