MRI apparatus with correction of envelope of RF pulse

An MRI apparatus, comprising:

• an amplifier configured to amplify an RF pulse and output an amplified RF pulse to an RF coil;
• processing circuitry configured to perform correction processing on an envelope of an RF pulse to be inputted to the amplifier so as to compensate for nonlinear input-output characteristics of the amplifier;
• and
• a detector configured to detect an amplified RF pulse outputted from the amplifier and to output a detected pulse as a detection RF pulse, wherein
• the amplifier is configured to receive a reference RF pulse generated based on a digital signal and to output the amplified RF pulse as an output RF pulse to the RF coil by amplifying the reference RF pulse, and
• the processing circuitry is further configured to
• select a correction information item out of a plurality of correction information items prepared for a corresponding plurality of imaging conditions, and
• perform correction processing by using the selected information item on an envelope of the reference RF pulse to be inputted to the amplifier such that an envelope of the output RF pulse outputted at a time of imaging an object matches the envelope of the reference RF pulse.