【How-to】How do they check your gallbladder

an abdominal X-ray, a HIDA scan (uses radioactive material) can measure gallbladder emptying while an ERCP test uses an endoscope to place dye in the ducts of the pancreas, gallbladder and liver, and. Magnetic resonance imaging (MRI) is sometimes used to detail the organ structures (liver, gallbladder, and pancreas).