Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest , PA and lateral . There is minimal linear opacity in the left lower lobe . The lungs are otherwise clear . The hilar and cardiomediastinal contours are normal . There is no pneumothorax or pleural effusion . Pulmonary vascularity is normal . Sternal cerclage wires are intact .
    OUTPUT:
    
Linear opacity in the left lower lobe likely represents atelectasis .