Which organ is primarily involved in the hepatobiliary imaging using Tc mebrofenin?

• A. Heart
• B. Gallbladder
• C. Stomach
• D. Kidneys

Answer: (B)

The gallbladder is the primary organ involved in hepatobiliary imaging when using Tc mebrofenin. Technetium-99m mebrofenin is a radiopharmaceutical specifically designed for assessing liver and biliary function. It is actively taken up by hepatocytes in the liver and subsequently excreted into the bile. This process allows for visualization of the gallbladder under imaging.

In a typical procedure, after Tc mebrofenin is injected, it will be concentrated in the liver, then released into the biliary tree, leading to representation of the gallbladder if it is functioning properly. Imaging assists in evaluating gallbladder conditions, such as cholecystitis or obstructive jaundice.

The heart, stomach, and kidneys, while important organs, are not primarily assessed in this specific type of imaging. The focus on the gallbladder allows for targeted diagnostic capabilities concerning liver and biliary health, making it the correct answer for this question.