1 (If you don't know what these, are set them each to 0.5. 2  z is the value that specifies the level of confidence you want in your confidence interval when you analyze your data. 3  Typical levels of confidence for surveys are 95%, in which case z is set to 1.96. 4  E sets the accuracy of your sample proportions.
A hepatobiliary (HIDA) scan is an imaging procedure used to diagnose problems of the liver, gallbladder and bile ducts. For a HIDA scan, also known as cholescintigraphy and hepatobiliary scintigraphy, a radioactive tracer is injected into a vein in your arm.
This test is one of the main methods your doctor uses to make a diagnosis of gallbladder disease. An ultrasound can evaluate the gallbladder for the presence of gallstones, thickened walls, polyps, or masses. It can also identify any issues within your liver. HIDA scan. A HIDA scan looks at the duct system within the gallbladder and liver.