Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . There is no focal consolidation , pleural effusion or pneumothorax . Cardiomediastinal silhouette is within normal limits , accounting for patient rotation . No acute osseous abnormalities are identified . There is a large amount of pneumoperitoneum , better evaluated on the CT abdomen and pelvis performed on the same date . Left - sided subclavian line terminates in the upper SVC .
    OUTPUT:
    
Large volume pneumoperitoneum .