PROBLEM TO BE SOLVED: To reduce an artifact caused by the nonlinearity of the gradient magnetic field and/or inhomogeneities of the magnetic field, without extending the imaging time in the continuous image forming by a fluoroscopy or others.SOLUTION: An MRI apparatus includes: an imaging means for measuring echo data associated with at least one measurement trajectory in k-space, while varying angles with respect to a coordinate axis in the k-space of the measurement trajectory, so as to collect at least one measured data for each of the angles and an image reconstruction means for rearranging the measured data in the k-space and reconstructing an image, wherein the imaging means performs time-series image forming of the desired area of the subject and obtains a plurality of sets of measured data. The image reconstruction means calculates a phase for correction based on standard data selected from the measured data for each of the angles, prior to rearranging the measured data in the k-space, and performs a phase correction as to the measured data, by using the phase for correction being calculated.COPYRIGHT: (C)2013,JPO&INPIT【課題】フルオロスコピー等の連続撮像において、撮影時間を延長することなく、傾斜磁場の非線形性や磁場不均一に起因するアーチファクトを低減する。【解決手段】MRI装置は、k空間における1以上の計測軌跡に対応するエコーデータを、該計測軌跡のk空間座標軸に対する角度を変えながら計測し、角度毎に少なくとも一つの計測データを収集する撮影手段と、前記計測データをk空間に再配置し画像再構成する画像再構成手段とを備え、撮影手段は、被検体の所望の領域について時系列の撮影を行い、複数組の計測データを取得する。画像再構成手段は、k空間への計測データの再配置に先立ち、角度毎に、計測データから選択した基準データをもとに補正用位相を算出し、算出された補正用位相を用いて計測データを位相補正する。【選択図】図12
