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NMR measurements using recursive RF excitation

  • US 5,185,574 A
  • Filed: 08/09/1991
  • Issued: 02/09/1993
  • Est. Priority Date: 08/09/1991
  • Status: Expired due to Term
First Claim
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1. In an NMR system for acquiring an NMR echo signal by executing a pulse sequence in which a first RF excitation pulse produces transverse magnetization in spins subject to a polarizing magnetic field and an NMR echo signal is subsequently produced and acquired by a receiver, the improvement comprising:

  • means for storing the acquired NMR echo signal;

    means coupled to the storing means for producing an RF excitation waveform that has a shape which is determined by the acquired NMR echo signal; and

    means coupled to the last named means for executing a pulse sequence in which an RF excitation pulse has a waveform determined by the acquired NMR echo signal from a previous pulse sequence.

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