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Cholescintigraphy or hepatobiliary scintigraphy is scintigraphy of the hepatobiliary tract, including the gallbladder and bile ducts. The image produced by this type of medical imaging , called a cholescintigram , is also known by other names depending on which radiotracer is used , such as HIDA scan , PIPIDA scan , DISIDA scan , or BrIDA scan .
The image produced by this type of medical imaging, called a cholescintigram, is also known by other names depending on which radiotracer is used, such as HIDA scan, PIPIDA scan, DISIDA scan, or BrIDA scan. Cholescintigraphic scanning is a nuclear medicine procedure to evaluate the health and function of the gallbladder and biliary system.
However, clear fluid and routine medication is allowed before the scan. [1] Negative oral contrast such as pineapple juice, [ 1 ] date syrup, ferumoxsil, Açaí juice and water are useful in decreasing T2 signal intensity, thus minimising signals from stomach and duodenum from interfering with signals from the biliary system.
Intestinal perforation is a risk of any gastroenterologic endoscopic procedure, and is an additional risk if a sphincterotomy is performed. As the second part of the duodenum is anatomically in a retroperitoneal location (that is, behind the peritoneal structures of the abdomen), perforations due to sphincterotomies are retroperitoneal.
The system is usually referred to as the biliary tract or system, [9] and can include the use of the term "hepatobiliary" when used to refer just to the liver and bile ducts. [1] The name biliary tract is used to refer to all of the ducts, structures and organs involved in the production, storage and secretion of bile. [10] The tract is as follows:
There are at least four types of cholangiography: [citation needed] Percutaneous transhepatic cholangiography (PTC): Examination of liver and bile ducts by x-rays. This is accomplished by the insertion of a thin needle into the liver carrying a contrast medium to help to see blockage in liver and bile ducts.
Women more commonly have stones than men and they occur more commonly after age 40. [4] Certain ethnic groups are more often affected; for example, 48% of American Indians have gallstones. [4] Of all people with stones, 1–4% have biliary colic each year. [5] If untreated, about 20% of people with biliary colic develop acute cholecystitis. [5]
All of the hepatobiliary visualization agents previous to mebrofenin have the same structural composition with changes only of the substituants on the phenyl ring of the lidocaine analogue molecules. Mebrofenin's fast hepatic excretion (t ½ =17 minutes) and high hepatic uptake (98.1%) can be attributed to the 3-bromo-2,4,6-trimethylphenyl moiety.