Magnetic resonance imaging apparatus and control method thereof

摘要

The magnetic resonance imaging apparatus includes a main magnet to generate a static magnetic field in an imaging region, a gradient coil assembly to form a gradient in the static magnetic field, a radio frequency (RF) coil assembly to apply a first RF pulse and second RF pulse with respect to n (n≧2) slice regions located at different positions in the imaging region, to excite atomic nuclei of the slice regions, and a controller to control the RF coil assembly to apply a first RF pulse and second RF pulse having a first center frequency f0 to a first slice and to apply a first RF pulse having a second center frequency f0+fs1 and a second RF pulse having a third center frequency f0−fs1 to a second slice.

主权项

1. A magnetic resonance imaging apparatus comprising:
a main magnet which generates a static magnetic field in an imaging region; gradient coils which form magnetic field gradients in the static magnetic field; a radio frequency (RF) coil assembly which applies a first RF pulse and a second RF pulse to n (n≧2) slice regions located at different positions in the imaging region to excite atomic nuclei of the slice regions; and a controller which controls the RF coil assembly to apply the first RF pulse and the second RF pulse having a first center frequency f0 to a first slice region of the slice regions, to apply the first RF pulse having a second center frequency f0+fs to a second slice region of the slice regions, and to apply the second RF pulse having a third center frequency f0−fs to the second slice region, so that each of the second center frequency and the third center frequency applied to the second slice region is shifted from the first center frequency by a quantity fs, wherein the controller is configured to adjust the quantity fs to obtain a desired slice gap between the first and second slice regions.