Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Aside from minimal bilateral lower lobe atelectasis , the lungs are clear . The heart is top normal in size . The hilar and mediastinal contours are normal . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
Minimal bilateral lower lobe atelectasis , without evidence of acute cardiopulmonary process .