PROBLEM TO BE SOLVED: To provide a magnetic resonance imaging apparatus that obtains clear MRI and MRE images in a short echo time.SOLUTION: A magnetic resonance imaging apparatus comprises: receiving means 53 that receives an electromagnetic wave on the basis of echo time set on the basis of a difference in resonance frequency gradient magnetic field application means 51d that applies a gradient magnetic field in a read-out direction in synchronization with the echo time intensity image acquisition means 54d that acquires and calculates a first water-based image and a second fat-based image on the basis of the acquired electromagnetic wave oscillation providing member 16 that provides an inspected part with multiple oscillations which are synchronized with the echo time and differ in phase and hardness estimation means 56 that estimates hardness of the inspected part on the basis of a wavelength λ of the oscillatory wave obtained from an MR phase image corresponding to a phase of an electromagnetic wave signal, a frequency f of the oscillatory wave and density ρ of the inspected part.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】鮮明なMRI画像とMRE画像とを短いエコー時間で得る磁気共鳴撮影装置を提供する。【解決手段】磁気共鳴撮影装置は、共鳴周波数のずれに基づいて設定されたエコー時間に基づいて電磁波を受信する受信手段53と、エコー時間に同期させてリードアウト方向に傾斜磁場を印加する傾斜磁場の印加手段51dと、取得された電磁波に基づいて水をベースとする第1の画像と脂肪をベースとする第2の画像とを取得、算出する強度画像の取得手段54bと、エコー時間に同期し且つ位相の異なる複数の振動を被検査部に付与する振動付与部材16と、電磁波信号の位相に応じたMR位相画像から得られた振動波の波長λと、振動波の周波数fと、被検査部の密度ρと、に基づいて、被検査部の硬さを推定する硬さ推定手段56とを備える。【選択図】図2
