Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest is compared to previous exam from earlier the same day at 12 :44 p .m . The lungs remain clear . Cardiomediastinal silhouette is stable as are the osseous and soft tissue structures . No visualized free air is seen below the diaphragm .
    OUTPUT:
    
No significant interval change since prior , no visualized air below the diaphragm .