MAGNETIC RESONANCE IMAGING APPARATUS

摘要

While a magnetic resonance signal is received a plural number of times during shifting of a table (shifting means), a gradient magnetic field is applied in the direction of shifting the table with the application amounts (intensity and application time period) of the gradient magnetic field in the direction of shifting the table being varied for each of data acquisitions. Unlike the conventional phase encoding, the encoding using this gradient magnetic field in the direction of shifting the table is performed in such a manner that a series of phase encodings are performed at different positions of a subject to be examined. Therefore, Fourier transform cannot be applied to the image reconstruction. In view of this, the reconstruction is performed by deciding the distribution of the magnetization of total FOV for the subject in such a manner that minimizes the sum of the squares of the respective absolute values of the differences between the received signals and the signals established as parameters and calculated from the distribution of the magnetization. Even when the signal acquisition range in the direction of shifting the table is narrow, the inventive magnetic resonance imaging apparatus performs an imaging, while continuously shifting the table, thereby achieving a high-rate imaging having a wide view field.