Fig. 25-2. A, Survey, or "scout," film of the abdomen, with emphasis on the lumbar vertebrae. Note the twelfth ribs, the bodies and transverse and spinous processes of vertebrae (L.V. 4 spinous process is on the supracristal plane), and gas in the large intestine, particularly in the descending colon. B, Survey film with emphasis on soft tissues. Note the kidneys, psoas major muscles, and urinary bladder. The twelfth ribs are much shorter than in A. Note the transverse processes of the lumbar vertebrae and the sacroiliac joints, sacrum, and coccyx. Click for high resolution image.