Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Normal cardiomediastinal and hilar contours . Low lung volumes bilaterally with clear lungs . Normal pleural surfaces . Lucency in the midline and left subdiaphragmatic region likely represents intraluminal air , but extraluminal air can not be definitively excluded . Gaseous distention of bowel .
    OUTPUT:
    
Lucency in the midline and left subdiaphragmatic region likely represents intraluminal air , but extraluminal air can not be definitively excluded . Consider left lateral decubitus radiographs for further evaluation .