International Board of Certified Lactation Consultant (IBCLC) Practice Exam

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What contrast agent is extremely rarely used for hepatic and pancreatic MRIs?

Gadobutrol
Magnetic Resonance Cholangiopancreatography (MRCP)
Mangafodipir Trisodium
Iohexol

The correct answer is: Mangafodipir Trisodium

Mangafodipir Trisodium is the correct choice, as it is a contrast agent that has fallen out of favor and is extremely rarely used in hepatic and pancreatic MRIs. Historically, it was developed for enhanced imaging of liver lesions and for assessing liver function based on manganese uptake. However, it has very limited usage today due to availability issues and the advent of more effective and safer contrast agents. In the context of the other options, Gadobutrol is a gadolinium-based contrast agent that is widely used for MRI due to its efficacy in providing clear images of soft tissues, including the liver and pancreas. Magnetic Resonance Cholangiopancreatography (MRCP) is a non-invasive imaging technique that relies on the body's natural magnetic properties without the use of iodine-based contrast; it helps visualize bile ducts and pancreatic ducts. Iohexol is primarily an iodine-based contrast agent used for CT scans and is not typically utilized in MRIs. These alternatives are much more commonly employed in imaging studies, making Mangafodipir Trisodium a rare choice for such applications.