PROBLEM TO BE SOLVED: To improve transmission efficiency of an RF amplifier even in the presence of a reflection wave in the case of a heavy load, in a magnetic resonance imaging apparatus.SOLUTION: A magnetic resonance imaging apparatus according to this embodiment comprises: a transmission coil which transmits a high frequency pulse； a high-frequency amplifier which sends a high frequency pulse signal to the transmission coil； and a cable for phase adjustment which is provided between the high-frequency amplifier and the transmission coil and whose line length is determined on the basis of the transmission efficiency or output power of the high-frequency amplifier.SELECTED DRAWING: Figure 3【課題】磁気共鳴イメージング装置において、高負荷の場合において、反射波が存在しても、ＲＦ増幅器の送信効率を高めること。【解決手段】本実施形態に係る磁気共鳴イメージング装置は、高周波パルスを送信する送信コイルと、前記送信コイルに高周波パルス信号を伝送する高周波増幅器と、前記高周波増幅器と前記送信コイルとの間に設けられ、線路長が前記高周波増幅器の送信効率又は出力電力に基づいて決定される位相調整用ケーブルと、を備えた。【選択図】 図３
