Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without focal consolidation , effusion , or overt pulmonary edema . The cardiomediastinal silhouette is stable given differences in positioning and technique . Slight compression deformity of a lower thoracic vertebral body is unchanged . Compressed lumbar vertebral body is obscured on this image . There is a sliver of lucency below the left hemidiaphragm on the frontal and adjacent to the right hemidiaphragm on the lateral .
    OUTPUT:
    
No definite acute cardiopulmonary process . Sliver of free intraperitoneal air suspected , not unexpected within a few days after intra-abdominal surgery .