What type of examination is cholangiography specifically used for?

Cholangiography is a medical imaging technique specifically designed to visualize the bile ducts, which transport bile from the liver to the gallbladder and the small intestine. This examination allows healthcare providers to diagnose conditions such as bile duct obstructions, gallstones, or tumors. By using contrast dye and advanced imaging techniques like X-rays or MRI, cholangiography provides detailed images of the bile duct system, enabling effective assessment and management of various hepatobiliary diseases.

The other options, while relevant to different medical procedures, focus on areas unrelated to cholangiography. For instance, examining muscle tissues pertains to procedures like electromyography or muscle biopsy. Investigating the digestive tract involves techniques such as endoscopy or colonoscopy, which study organs like the stomach and intestines. Assessing heart function is typically conducted through tests such as echocardiograms or stress tests, which evaluate cardiovascular health. Thus, the specificity of cholangiography to the bile ducts is what makes it the correct choice in this context.