PURPOSE: A magnetic resonance imaging device, an amplifier therefor, and a control method thereof are provided to improve a use rate of the magnetic resonance imaging device by controlling an operating module by using a control module for back-up.CONSTITUTION: An amplifier for a magnetic resonance imaging device includes a first module(124) and a second module(122). A first module(126) for back-up is a back-up module for the first module. A determining unit determines whether the first module is normally operated or not. If the first module is not normally operated, a switching module(128) performs switching operation to perform tasks performed in the first module in the first module for back-up. Elements included in the first module have more malfunction than elements included in a second module.COPYRIGHT KIPO 2013[Reference numerals] (122) Second module (124) First module (126) First module for backup (128) Switching module (130) Determining module (AA,BB) Measuring unit적어도 하나 이상의 증폭기를 포함하는 자기공명영상(Magnetic Resonance Image: MRI)장치는 적어도 하나 이상의 증폭기의 동작모듈을 제어하는 제어모듈, 백업용 제어모듈, 제어모듈이 정상동작하는지 여부를 결정하는 결정부 및 스위칭모듈을 포함한다.
