Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated and clear . Cardiomediastinal silhouette is mildly enlarged . Enlarged right and left main pulmonary arteries are again noted , likley reflecting pulmonary arterial hypertension . There is no pneumothorax . There is minimal blunting of the bilateral posterior costophrenic angles , which may represent tiny pleural effusions or pleural thickening . Visualized osseous structures are unremarkable .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Enlarged right and left main pulmonary arteries , likely reflecting pulmonary arterial hypertension . 3 . Minimal blunting of the bilateral posterior costophrenic angles , which may represent tiny pleural effusions or pleural thickening .