Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in sitting semi-upright position . Comparison is made with the next preceding similar study of ___ . As before , status post sternotomy and previous bypass surgery with mild - to - moderate cardiac enlargement but absence of any pulmonary congestion . No new pulmonary infiltrates are seen . No evidence of subdiaphragmatic free abdominal air . Comparison with the previous study , moderately gas - filled colon loops are seen , but no gross interval change has occurred .
    OUTPUT:
    
No evidence of free subdiaphragmatic abdominal air in the patient with pain following colonoscopy .