Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is linear opacification of the left lung base and right mid lung , likely representing atelectasis . The lungs are otherwise clear . The cardiac silhouute is top normal in size . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Linear opacification of the left lung base and right mid lung , likely representing atelectasis .