Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP semi upright and lateral chest radiographs . The lungs are low in volume with bronchovascular crowding . There is no focal consolidation , pleural effusion or pneumothorax . Mild cardiomegaly is stable . Tortuosity and general enlargement of the thoracic aorta contributiing the increased width of the mediastinum remains stable over multiple prior examinations . The pulmonary arteries appear enlarged suggesting pulmonary hypertension .
    OUTPUT:
    
No acute intrathoracic process . Pulmonary arterial enlargement may reflect pulmonary hypertension .