Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left internal jugular central venous catheter has been removed . Heart size remains mildly enlarged with a left ventricular predominance . The aortic knob is calcified . Mediastinal and hilar contours are unchanged with enlargement of the main pulmonary artery compatible with pulmonary arterial hypertension . There is no pulmonary vascular congestion . Patchy opacities in the lung bases may reflect atelectasis but infection is not excluded in the correct clinical setting . No pleural effusion or pneumothorax is identified . Multilevel degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
Patchy bibasilar opacities may reflect atelectasis but infection is not excluded in the correct clinical setting . Enlargement of the pulmonary arteries compatible with pulmonary arterial hypertension .