Nil by mouth for 4 h before. Oral contrast is given 30 min before, as for the abdomen. If the liver is the only organ to be scanned, the oral contrast can be omitted to decrease the artefact from the stomach, which can obscure small lesions in the liver.
KeywordsPortal Vein Oral Contrast Vein Patency Coeliac Axis Portal Vein Patency
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