Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right - sided central venous catheter tip terminates in the mid SVC , not significantly changed when compared to the prior exam . No pneumothorax is present . The heart size is normal . There is continued enlargement of the main pulmonary artery , compatible with known pulmonary arterial hypertension . The mediastinal contours are within normal limits . The lungs are clear . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Central venous catheter tip in the mid SVC . Enlargement of the pulmonary artery compatible with pulmonary arterial hypertension .