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    • 5. 发明授权
    • NMR imaging method
    • NMR成像方法
    • US4649345A
    • 1987-03-10
    • US766316
    • 1985-08-16
    • Kiyoshi YodaHidenobu ItagakiSatoshi FujimuraTadatoshi Yamada
    • Kiyoshi YodaHidenobu ItagakiSatoshi FujimuraTadatoshi Yamada
    • G01R33/561G01R33/20
    • G01R33/561
    • A nuclear magnetic resonance imaging method in which the time necessary for forming a two-dimensional image of a single plane of a sample is significantly reduced, making the method applicable for imaging of the human heart or the like. First, nuclear spin is excited in a given volume of a sample disposed in a magnetostatic field. Secondly, first, second and third oblique magnetic fields are applied to the volume. Thirdly, the nuclear spin is rephased under the second magnetic field gradient by applying a 180.degree. pulse. Fourthly, the nuclear spin is phase modulated in the direction of the third magnetic field gradient prior to or following read out of a spin echo signal derived from the rephasing of the spin. Fifthly, the first through fourth steps are repeated, wherein the third magnetic field gradient in each of the repetitions of the fourth step has a constant absolute value and the direction of the third magnetic field gradient alternates.
    • 其中形成样品的单个平面的二维图像所需的时间显着减小的核磁共振成像方法,使得该方法适用于人心脏的成像等。 首先,在静磁场中的给定体积的样品中激发核旋转。 其次,第一,第二和第三倾斜磁场被施加到体积。 第三,通过施加180°脉冲,在第二磁场梯度下重核核自旋。 第四,在自旋回波信号导出的自旋回波信号之前或之后,核自旋在第三磁场梯度的方向上进行相位调制。 第五,重复第一至第四步骤,其中第四步骤的每个重复中的第三磁场梯度具有恒定的绝对值,并且第三磁场梯度的方向交替。