Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear without focal opacity , pleural effusion or pneumothorax . Enlargement of pulmonary arteries is compatible with known history of pulmonary arterial hypertension . The heart and mediastinal contours are unremarkable , with density over the trachea and aortic arch on the lateral view , compatible with known calcified mediastinal lymph nodes .
    OUTPUT:
    
No acute intrathoracic process with stable calcified mediastinal nodes consistent with prior granulomatous disease