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Abstract

A method of acquiring MR echo data and MRI system to reconstruct a three or more dimensional image of an object use a 'hybrid echo volume imaging (EVI)' technique. In the hybrid EVI, applied to the object at predetermined timings are one RF excitation pulse concurrently with a slice-selective pulse, a readout gradient pulse, and a plurality of RF refocusing pulses. After each of the plurality of RF refocusing pulses, applied to the object is a slice-encoding gradient pulse having a first encoding value changed at every application of each of the RF refocusing pulses. After the slice-encoding gradient pulse, applied are a plurality of further readout magnetic gradient pulses whose polarities are alternately inverted, thereby a plurality of echoes are generated from the object in response to inversion of the polarities. Concurrently with applying the slice-encoding pulse and the plurality of further readout gradient pulses, applied are phase-encoding gradient pulses having a second encoding value changed at every inversion of the polarities. GRASE-specific ringing artifacts are preferably eliminated without degrading an imaging matrix size or spatial resolution and without prolonging imaging time.

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