| 摘要 |
A gradient magnetic field irradiation method comprising irradiating RF pulses and a slice plane selection gradient magnetic field to excite an atomic nucleus of a slice plane, irradiating then first, second and third frequency encoding gradient magnetic fields under the following condition and receiving NMR signals during the irradiation of the third frequency encoding gradient magnetic field: (A) (1/k)-(4/n)+1=0 where a ratio of intensity of the first, second and third frequency encoding gradient magnetic field is k:n:1; (B) the irradiation time of the first and second frequency encoding gradient magnetic fields is T/k and 2T/n, respectively, when the irradiation time of the third frequency gradient magnetic field is 2T; and (C) a time interval between the start timing of the irradiation of the first frequency encoding gradient magnetic field and the start timing of the irradiation of the second frequency encoding gradient magnetic field is equal to a time interval between the start timing of the irradiation of the second frequency encoding gradient magnetic field and the start timing of the irradiation of the third frequency gradient magnetic field.
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