Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta is tortuous and diffusely calcified . Prominence of the right hilum may suggest right pulmonary arterial enlargement . There is no pulmonary vascular congestion . Linear opacities in the lung bases likely reflect subsegmental atelectasis . Eventration of the right hemidiaphragm is present . No pleural effusion or pneumothorax is identified . There are no acute osseous abnormalities .
    OUTPUT:
    
Subsegmental atelectasis in the lung bases . Right hilar enlargement could suggest a dilated right pulmonary artery .