Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal . The hilar and mediastinal contours are within normal limits . There is no pneumothorax , focal consolidation , or pleural effusion . Large amount of gas is seen within the splenic flexure , but there is no evidence of obstruction . No free air is detected .
    OUTPUT:
    
1 . No acute intrathoracic process . 2 . Large amount of air within the splenic flexure .