Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided PICC terminates in the upper SVC . Heart size is normal . Mediastinal and hilar contours are unchanged . Lungs appear hyperinflated . Streaky opacities in the lung bases likely reflect atelectasis . No pleural effusion or pneumothorax is seen . There is no pulmonary vascular congestion . Mild degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
Mild bibasilar atelectasis .