Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Give AP technique and the low lung volumes , heart size is normal . Cardiomediastinal silhouette and hilar contours are unremarkable . Lungs are clear . Pleural surfaces are clear without effusion or pneumothorax . Lucency under the right hemidiaphragm is once again noted , compatible with pneumoperitoneum , expected in the setting of peritoneal dialysis .
    OUTPUT:
    
No acute cardiopulmonary abnormality .