Magnetic resonance imaging device and imaging parameter determination method

Provided is an MRI device using a transmission coil having a plurality of channels, wherein safety and image quality are obtained at the same time. In the present invention, a SAR distribution is computed, and an imaging parameter is determined for optimizing high-frequency magnetic field distribution of an imaging region while keeping the maximum value of the SAR equal to or less than a threshold value set in advance. The determined imaging parameter includes a high-frequency magnetic field parameter for specifying a high-frequency pulse transmitted from each of a plurality of channels. The SAR distribution is computed using a database for retaining an electric field distribution of each of the plurality of channels for each subject model retained in advance.