Challenge Your Exam Readiness With Our Free Nuclear Medicine Practice Questions

Comprehensive and Detailed Explanation: Hepatobiliary scintigraphy using Tc-99m IDA derivatives (e.g., mebrofenin or disofenin) is primarily indicated for the diagnosis of acute cholecystitis, evaluation of biliary obstruction, assessment of bile leaks, and measurement of gallbladder ejection fraction. Non-visualization of the gallbladder after adequate hepatic uptake and excretion is the classic finding in cystic-duct obstruction. Morphine augmentation or delayed imaging may be used when the gallbladder is not seen on early images. Renal studies use different agents (MAG3, DTPA). Lung perfusion uses MAA. Lymphoma staging is typically performed with FDG PET/CT. Proper patient preparation (NPO for several hours) and knowledge of interfering medications (opioids, etc.) are important for accurate results. Technologists must time the imaging sequence correctly and recognize when pharmacologic intervention is required.