A Hepatobiliary Imino-Diacetic Acid scan, (HIDA scan) or cholescintigraphy is a nuclear imaging procedure to evaluate the health and function of the gallbladder. A radioactive tracer, usually technetium-99m, is injected through any accessible vein, then allowed to circulate to the liver, where it is excreted into the biliary system and stored by the gallbladder and biliary system.^[1]

In the absence of disease, the gallbladder is visualized within 1 hour of the injection the radioactive tracer. If the gallbladder is not visualized within 4 hours after the injection, this indicates either cholecystitis or cystic duct obstruction.

HIDA scan has sensitivity of 95%, Specificity of 90%.^{[citation needed]}

[edit] See also

• Iminodiacetic acid

[edit] References