Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are unchanged with tortuosity of the thoracic aorta again noted . There is no pulmonary vascular congestion . Streaky linear opacities in the bases are compatible with subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . Interposition of the colon between the diaphragm and liver is noted on the right . Distended bowel loops are partially imaged within the upper abdomen .
    OUTPUT:
    
Mild bibasilar atelectasis .