Air under central tendon of diaphragm is
Air under diaphragm sign
Cupola sign
Doges cap sign
Falciform ligament sign
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.
Gastrointestinal Radiology