Fluoroscopy vs MRI. I am assuming frcp and ERCP are the same. These stand for fluoroscopic/endoscopic retrograde cholangiopancreatography and allow for the evaluation of the pancreatic and common bile ducts. If necessary a stent can be placed during this procedure, biopsy perfromed or stones removed. Mrcp is the MRI equivalent and allows for diagnosis of ductal abnormalities without the ability to treat.