Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes contribute to bibasilar atelectasis as well as bronchovascular crowding . The heart size is exaggerated due to the low lung volumes and the AP view . There are no focal opacities concerning for pneumonia . No pleural effusion or pneumothorax . The right paratracheal stripe is noted to be widened , possibly due to a tortuous vessel , however lymphadenopathy is not excluded . Patient status post thoracic spinal fusion .
    OUTPUT:
    
1 . Atelectasis due to low lung volumes 2 . Widening of the right paratracheal stripe may be due to a tortuous vascular structure however lymphadenopathy or other mass lesion is not excluded . Correlation with prior imaging would be helpful . In the absence of such , a chest CT would be appropriate for further workup .