Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph , lung volumes are significantly decreased accentuating the cardiomediastinal and bronchovascular structures . The heart is enlarged . No definite free air is identified . There is no large pleural effusion or pneumothorax . Note is made of distended bowel loops in the upper abdomen .
    OUTPUT:
    
No definite free air .