Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The heart size and cardiomediastinal contours are normal . Patchy linear opacity at the left base is consistent with atelectasis . The lungs are otherwise clear . No focal consolidation , pleural effusion , or pneumothorax . No radiopaque foreign body .
    OUTPUT:
    
Small left base atelectasis . No focal consolidation .