Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided dual lumen central venous catheter terminates at the SVC / right atrial junction . Low lung volumes are present . The heart size is normal but accentuated by the low lung volumes . The aorta remains tortuous . There is crowding of the bronchovascular structures . Mild pulmonary vascular congestion is likely present . Patchy airspace opacities in the lung bases likely reflect atelectasis though infection can not be excluded . No pleural effusion or pneumothorax is identified . There are no acute osseous abnormalities .
    OUTPUT:
    
1 . Mild pulmonary vascular congestion . 2 . Low lung volumes with patchy bibasilar airspace opacities likely reflecting atelectasis .