Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Multiple loops of distended colon are present . No free air is seen . The heart size is normal . The hilar and mediastinal contours are within normal limits . There is moderate atherosclerotic calcification of the aortic knob . There is no pneumothorax , focal consolidation , or pleural effusion .
    OUTPUT:
    
1 . No acute intrathoracic process . 2 . Multiple loops of distended colon . No free air .