Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Mild cardiomegaly is similar to prior . The contour of the main pulmonary artery is prominent , similar to prior , and likely reflective of pulmonary arterial hypertension . Lungs are clear without focal or diffuse abnormality . No pneumothorax or pleural effusion . No radiopaque foreign body . Osseous structures are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process . Stable mild cardiomegaly and enlarged main pulmonary artery contour .