Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Worsened bibasilar opacities likely reflect atelectasis . Lung volumes are low . The heart is top normal . The aortic arch is calcified . There is no large pleural effusion or pneumothorax . Curvilinear opacities in the region of the bilateral hemidiaphragms are suspicious for subdiaphragmatic free air but could also reflect air within loops of bowel .
    OUTPUT:
    
1 . Possible new pneumoperitoneum . Distinguish with left lateral decubitus radiograph of the abdomen . 2 . Low lung volumes and bibasilar atelectasis .