Gas visible in the subcutaneous tissues around proximal MCP of the hallux, and medially around the ankle bones
Massive distension of bladder
Gross cardiomegally with dilated right atrium and upper lobe blood diversion.
Pneumoperitoneum with air visible under both diaphragms as a result of peptic ulcer perforation.
X-ray illustrates the 'continuous diaphragm sign' - the diaphragm is not usually seen in its entirety due to the cardiac shadow.
Abdo Film shows distended bowel loops and Rigler's sign
Erect chest shows air under the diaphragm
Dilated bowel loops.
There is also Rigler's sign - both sides of the bowel wall are visible due to air outside and inside the bowel.