MAGNETIC RESONANCE IMAGING APPARATUS

摘要

PROBLEM TO BE SOLVED: To obtain a correct tomographic image of a part of a living being presenting a cyclical motion by exciting a plurality of strip-shaped areas all at once when exciting an object to be imaged by a burst pulse to allow setting of the areas to have a width correlated to a discrete interval of a high frequency magnetic field subpulse. SOLUTION: A high frequency generated by a synthesizer 111 is applied to a high frequency magnetic coil 104 through a modulator 112 to generate a burst pulse with a different excitation frequency. In a state where a magnetostatic field is applied by a magnetostatic field generation coil 101, an inclined magnetic field pulse and a burst pulse in the first axis direction out of orthogonal three axes are applied. Thereafter, a 180 deg. high frequency magnetic field pulse and an inclined magnetic field pulse in the second axis direction are applied and subsequently, an inclined magnetic field in the third axis direction is applied inverting the intensity gradient as a second phase encode inclined magnetic field to receive a resonance signal. This photographing sequence is repeatedly executed to match a heart time phase of a heart thereby fast photographing the behavior in the motion of the object to be photographed.