No MRI takes more than 60 minutes. If doctors do not suggest MRI suggest then it will take 30 minutes to 45 minutes. So the question “How Long Does an MRI Take” depends on the requirements of your doctor. If your radiologist has decided for an MRI of the brain plus further requirements, such as IACs (inner auditory canals), orbits or the CCJ (Cervical Cranial Junction), then the test may take 45 minutes.