Quantitation and the elimination of errors in bile reflux tests using a gamma camera.
Entero-gastric reflux may be assessed quantitatively using 99mTc HIDA and a gamma camera. We have devised a computer program which applies corrections for several sources of error. The technique was validated using naso-gastric aspiration and phantom experiments. In 23 patient studies, 13 patients considered not to show reflux by visual assessment had a mean percentage injected dose (PID) in the stomach of 1.9% before correction and less than 1% after correction. The 10 patients with reflux showed a fall of PID from 5.8% to 1.7% as a result of the correction. In 14 patients the mean PID in the stomach after computer correction (3%) was not significantly different from that (3.5%) measured by aspiration. Computer correction of bile reflux data is essential when attempting to quantify the amount of entero-gastric reflux using a gamma camera.
D001655:Bile Reflux / Q000000981:diagnostic imaging*; D001660:Biliary Tract Diseases / Q000000981:diagnostic imaging*; D004383:Duodenogastric Reflux / Q000000981:diagnostic imaging; D006801:Humans; D007098:Imino Acids; D007441:Intubation, Gastrointestinal; D011877:Radionuclide Imaging; D012984:Software; D013667:Technetium; D019784:Technetium Tc 99m Diethyl-iminodiacetic Acid
D007098:Imino Acids; D019784:Technetium Tc 99m Diethyl-iminodiacetic Acid; D013667:Technetium