Abstract: An MR imaging apparatus using NMR phenomenon includes a main magnet for generating a uniform static magnetic field in an imaging space, a first to a third gradient field coils, an RF coil for emitting an excitation RF pulse and a plurality of refocus RF pulses and detecting echo signals, an RF emitter for modulating and emitting the excitation RF pulse and refocus RF pulses with predetermined timing through the RF coil, and a slice-selecting gradient field pulse generator. A phase-encoding gradient field pules generator and a reading gradient field pulse generator are provided, along with a data collector for detecting, with a predetermined frequency (reference frequency), the echo signals detected by the RF coil, and collecting data therefrom. A phase detector determines phase differences of echo peaks in the echo signals with respect to the reference frequency, respectively.

Abstract: A magnetic resonance imaging apparatus uses an NMR phenomenon, and includes a number of imaging elements. A made magnet generates a uniform static magnetic field in an imaging space, and first, second and third gradient field coils are provided. These field coils are mounted on the main magnet, and generate three gradient field pulses with magnetic strength varying in three orthogonal directions in the imaging space. An RF coil is provided for transmitting an RF signal to an examinee, and for detecting an NMR signal generated therein. A gradient field control device is connected the gradient field coils for causing the gradient field coils to generate a plurality of gradient field pulses. A first pulse sequence is generated and repeated, while a phase-encoding gradient field pulse is varied.

Abstract: A magnetic resonance imaging method for emitting a single excitation RF pulse and then a plurality of refocusing RF pulses to an examinee to generate echo signals successively.