Patent ID: 7622926

Claim:
A magnetic resonance imaging apparatus comprising: a static magnetic field generation means for generating a static magnetic field in a space in which a subject lies down; a magnetic field gradient generation means for generating magnetic field gradients in the space; a radiofrequency magnetic field generation means for irradiating a radiofrequency magnetic field pulse, which induces nuclear magnetic resonance, to atomic nuclear spins in the subject; an echo signal reception means for detecting an echo signal derived from the nuclear magnetic resonance; a measurement control means for controlling the magnetic field gradient generation means, radiofrequency magnetic field generation means, and echo signal reception means so that the k-space to which data sets of echo signals are mapped will be measured by dividing the k-space into a plurality of blocks each of which contains a measurement trajectory passing through the origin of the k-space and whose measurement trajectories form different angles with respect to one of the coordinate axes of the k-space; a body motion compensation means for selecting a criterial block from among the plurality of blocks, detecting a body motion of the subject that has occurred between measurement of the criterial block and measurement of any other block, and compensating the body motion represented by the other block data by correcting the other block data so as to eliminate the adverse effect of the body motion on an image; a synthesis means for remapping the block data sets to the common k-space and synthesizing them; and an image reconstruction means for reconstructing an image using the common k-space data, wherein the body motion compensation means compensates the body motion represented by the other block data on the basis of the differences of a reference image, which is reconstructed using at least part of the data of the other block, from a plurality of different templates produced by moving a criterial image reconstructed using at least part of the data of the criterial block.