Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . Lucency below the right hemidiaphragm best seen on lateral projection is concerning for free air . Please correlate with subsequent CT of the abdomen and pelvis . The lungs are clear aside from mild bibasilar atelectasis . The heart size is top normal . The aorta is unfolded . No pneumothorax . Calcified rounded structure in the left upper quadrant is better assessed on the subsequent CT of the abdomen and pelvis .
    OUTPUT:
    
Findings concerning for pneumoperitoneum , please refer to subsequent CT of the abdomen and pelvis for further details .