Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal upright view of the chest . Heart size and cardiomediastinal contours are normal . Small bibasilar opacities may represent mild atelectasis . No focal consolidation , pleural effusion , pneumothorax , or pneumoperitoneum .
    OUTPUT:
    
No pneumoperitoneum or acute cardiopulmonary process .