Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomegaly is mild . Enlargement of the hilar pulmonary arteries is symmetric . There is no pneumothorax or large pleural effusion . The lungs are well expanded and clear without focal consolidation . There is no pulmonary edema . The upper abdomen is unremarkable .
    OUTPUT:
    
No pneumonia or pulmonary edema . Mild cardiomegaly . Possible pulmonary arterial hypertension .