Air under central tendon of diaphragm is: (A) Air under diaphragm sign, (B) Cupola sign, (C) Doges cap sign, (D) Falciform ligament sign
Answer is B. The 'Cupola sign' is seen on a supine chest/abdominal radiograph in the presence of pneumoperitoneum. It refers to non-dependent gas that rises within the abdominal cavity of the supine patient to accumulate underneath the central tendon of the diaphragm in the midline.