Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , causing accentuation of the pulmonary vasculature and exaggeration of the heart size . The lungs are grossly clear aside from minimal bibasilar atelectasis . Heart size is top normal . Note is made of a small hiatal hernia . The mediastinal contours are otherwise normal . There are no definite pleural effusions . No pneumothorax is seen .
    OUTPUT:
    
No acute cardiac or pulmonary process .