Related Experiment Video
Updated: Sep 30, 2026

Photoacoustic Cystography
Published on: June 11, 2013
Radiographic appearance of the nonabsorbed (unconjugated) and conjugated sodium tyropanoate (Bilopaque) in the bowel
Abstract:
A series of abdominal radiographs were taken in eight normal volunteers after the ingestion of sodium tyropanoate (Bilopaque). These showed nonabsorbed sodium tyropanoate to have a granular appearance, while the conjugated form had a smooth homogeneous appearance. The appearance of conjugated sodium tyropanoate in the bowel has the same diagnostic significance as conjugated iopanoic acid in the presence of a nonvisualized gallbladder. It indicates that the contrast material has passed through the hepatic ductal system and that there has been an opportunity for the gallbladder to opacify.
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