- usually performed following a cholycystectomy

- to check for residual stones in the biliary ducts that went undetected during surgery

- allows study of the biliary system in the post-operative period

- performed prior to removal of the surgically inserted T-tube

- fractional introduction of CM at 5 ml per exposure

- total CM introduced is 20 – 25 cc of iodinated contrast

Purpose:

1. visualize any residual or previously undetected cholelithiasis
2. evaluate the status of the biliary duct system
3. demonstrate small lesions, strictures or dilation within the biliary ducts