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Nuclear magnetic resonance refocusing pulses for inhomogeneous magnetic fields
Nuclear magnetic resonance refocusing pulses for inhomogeneous magnetic fields
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机译:非均匀磁场的核磁共振重聚焦脉冲
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摘要
A method for applying a nuclear magnetic resonance (NMR) sequence is described herein. The method includes applying a series of refocusing pulses to a substance within an inhomogeneous static magnetic field. Each refocusing pulse in the series of refocusing pulses includes a central axis, a total pulse duration greater than t180, and at least five segments (e.g., 5, 7, 11, 20, and 21). The phase of each segment is substantially anti-symmetric about the central axis of the refocusing pulse. In a more particular embodiment, the phase of each segment is also symmetric about the central axis of the refocusing pulse and the five segments include a substantially constant amplitude.
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