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SYSTEM, METHOD, AND APPARATUS FOR MAGNETIC RESONANCE RF-FIELD MEASUREMENT

  • US 20100315084A1
  • Filed: 06/15/2009
  • Published: 12/16/2010
  • Est. Priority Date: 06/15/2009
  • Status: Active Grant
First Claim
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1. A magnetic resonance imaging (MRI) apparatus comprising:

  • a magnetic resonance imaging (MRI) system having a plurality of gradient coils positioned about a bore of a magnet, and an RF transceiver system and an RF switch controlled by a pulse module to transmit RF signals to an RF coil assembly to acquire MR images; and

    a computer programmed to;

    apply a first off-resonant radio frequency (RF) pulse at a first frequency to a plurality of nuclei excited at a resonant frequency, wherein the first frequency is different than the resonant frequency;

    acquire a first signal from the plurality of nuclei after application of the first off-resonant RF pulse;

    determine a phase shift from the first signal, wherein the phase shift is based on the first off-resonant RF pulse;

    determine a B1 field based on the phase shift; and

    store the B1 field on a computer readable storage medium.

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