Magnetic resonance imaging apparatus

A magnetic resonance imaging apparatus comprising:

• a static magnetic field generator configured to generate a static magnetic field in a space in which a subject is placed;
• a radio frequency magnetic field irradiator configured to irradiate a radio frequency magnetic field on the subject;
• a gradient magnetic field applicator configured to apply a gradient magnetic field to the subject;
• a detector configured to detect magnetic resonance signals generated from the subject;
• a scan controller configured to obtain magnetic resonance signals of two kinds of substances showing difference of resonant frequencies by controlling operations of the gradient magnetic field applicator, the radio frequency magnetic field irradiator, and the detector;
• an arithmetic unit configured to carry out operational processing of the magnetic resonance signals;
• and
• a display device configured to display information obtained by the operational processing,
• wherein the arithmetic unit comprises:
• a spectrum calculator configured to calculate spectra of magnetic resonance signals of the two kinds of substances showing a difference of resonant frequencies,
• a temperature information calculator configured to calculate temperature information for inside of the subject on the basis of peaks of the calculated spectra,
• a temperature accuracy information calculator configured to calculate temperature accuracy information indicating accuracy of the temperature information on the basis of peaks of the calculated spectra, wherein the temperature accuracy information calculator comprises:
• a model function calculator configured to calculate model functions representing the calculated spectral peaks, respectively,
• a virtual model function generator configured to generate a plurality of virtual model functions for each of the two kind of substances by adding a plurality of virtual noises to each of the model functions, and
• a virtual temperature calculator configured to calculate virtual temperature from each of the virtual model functions, and
• wherein the temperature accuracy information calculator subjects a plurality of the virtual temperatures to a statistical treatment to obtain the temperature accuracy information, and
• a display information generator configured to generate display information to be displayed on the display device on the basis of the temperature information and the temperature accuracy information.