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Magnetic resonance image artifact correction using navigator echo information

  • US 6,586,935 B1
  • Filed: 03/31/2000
  • Issued: 07/01/2003
  • Est. Priority Date: 03/31/2000
  • Status: Expired due to Term
First Claim
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1. A method for characterizing magnet system instabilities in magnetic resonance imaging system, the method comprising the steps of:

  • applying magnetic field gradients and a radio frequency excitation pulse to gyromagnetic material of a subject of interest;

    applying an image echo readout gradient of a first polarity with a phase encoding gradient, followed by detecting first magnetic resonance signals from the subject;

    applying a navigator echo gradient of a second polarity opposite the first polarity of the image echo readout gradient and detecting second magnetic resonance signals representative of magnet system field instabilities due to magnet system structures; and

    analyzing the second magnetic resonance signals to characterize a plurality of effects of magnet system instabilities.

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