Mr imaging apparatus

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. A rotating device rotates the data collected from the echo signals based on the phase differences to connect phases of the echo signals to be continuous, and a data processor is provided for reconstructing a sectional image based on the rotated data.