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Training to become an MRI technician will take at least one or two years. You can finish an Associates degree in 2 years or go on to a Bachelors degree, requiring four years of study. Once you have finished the training, you should check with your states requirements for certification or licensing. The states have different rules and a variety of state health agencies that control certification. The certification exam from the American Registry of Radiologic Technologists (ARRT) is a national exam and 37 states will accept successful completion of the test as certification to work in their state.