Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest , portable . The lungs are clear . The heart is top - normal in size , unchanged . The hilar and cardiomediastinal contours are otherwise normal . The aorta is in an unfolded configuration , unchanged from the prior radiograph . There is no pneumothorax or pleural effusion . Pulmonary vascularity is normal .
    OUTPUT:
    
1 . No evidence of mediastinal widening to suggest aortic dissection . 2 . No acute cardiopulmonary process .