Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable chest radiograph demonstrates unremarkable mediastinal , hilar , and cardiac contours . Lungs are clear . Air beneath the central portion of the diaphragm suggests continued pneumoperitoneum . No pleural effusion or pneumothorax is evident . No pneumomediastinum identified . Right subclavian with tip in the distal SVC is noted .
    OUTPUT:
    
Continuous evidence of pneumoperitoneum . No pneumothorax or pneumomediastinum .