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    • 39. 发明申请
    • METHOD AND APPARATUS FOR BROADBAND DECOUPLING IN NUCLEAR MAGNETIC RESONANCE WITH CHIRP PULSES
    • 用于芯片磁共振的宽带解码方法与装置
    • WO9703548A2
    • 1997-02-06
    • PCT/US9611731
    • 1996-07-15
    • UNIV FLORIDA STATE
    • FU RIQIANGBODENHAUSEN GEOFFREY
    • G01R33/46
    • G01R33/4616
    • Methods and apparatus for broadband decoupling in nuclear magnetic resonance with chirp and other RF pulses are disclosed. Such methods may include the step of positioning the sample in a static magnetic field. Additional steps may define a first cycle of pulses, such as chirp pulses, wherein at least two of the pulses have a different initial phase angle from each other and may define a second cycle of pulses wherein at least two of the pulses in the second cycle have an initial phase angle different from the initial phase angles of the pulses in the first cycle. Further steps may repeatedly generate a supercycle of the first and second cycles to produce pulses for inverting the longitudinal magnetization in the sample and may also detect the signals emitted by the sample in response to inversion of the longitudinal magnetization. Alternatively, the chirp pulses in the first and second cycles may be defined to sweep a bandwidth of 100 kHz or more. The first and second cycles may also be defined to include linear frequency modulated RF pulses wherein each of the RF pulses has an amplitude which is substantially constant during at least about 50 % of the pulses. Apparatus for performing the disclosed methods is also disclosed. Other methods and apparatus are also disclosed.
    • 公开了用于啁啾和其他RF脉冲的核磁共振中宽带解耦的方法和装置。 这样的方法可以包括将样品定位在静态磁场中的步骤。 附加步骤可以定义脉冲的第一周期,例如啁啾脉冲,其中至少两个脉冲具有彼此不同的初始相位角,并且可以限定第二周期的脉冲,其中第二周期中的至少两个脉冲 具有与第一周期中的脉冲的初始相位角不同的初始相位角。 进一步的步骤可以重复地产生第一和第二循环的超级循环,以产生用于反转样品中的纵向磁化强度的脉冲,并且还可以响应于纵向磁化的反转来检测由样品发射的信号。 或者,第一和第二周期中的啁啾脉冲可以被定义为扫描100kHz或更大的带宽。 第一和第二周期也可以被定义为包括线性调频RF脉冲,其中每个RF脉冲具有在脉冲的至少约50%期间基本上恒定的幅度。 还公开了用于执行所公开方法的装置。 还公开了其它方法和装置。