Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Upright AP and lateral radiographs of the chest demonstrate underinflated but clear lungs . The hilar and cardiomediastinal contours are normal . There is minimal bibasilar atelectasis . There is no pneumothorax or pleural effusion . Pulmonary vascularity is normal . There is no evidence of infradiaphragmatic free air .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . No evidence of pneumoperitoneum .