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MAGNETIC RESONANCE SYSTEM AND METHOD TO ADJUST AT LEAST ONE SHIM CURRENT AND AN ASSOCIATED RF CENTER FREQUENCY DURING AN INTERLEAVED MULTISLICE MR MEASUREMENT OF A MOVING EXAMINATION SUBJECT

  • US 20120235681A1
  • Filed: 03/19/2012
  • Published: 09/20/2012
  • Est. Priority Date: 03/17/2011
  • Status: Active Grant
First Claim
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1. A method for implementing an interleaved multislice magnetic resonance (MR) measurement of a moving examination subject, comprising:

  • continuously moving an examination subject through an MR data acquisition unit;

    while continuously moving the examination subject through the MR data acquisition unit, acquiring MR data from the subject in an interleaved multislice MR data acquisition procedure in which a basic magnetic field is generated in a measurement volume of the MR data acquisition unit and in which at least two successive excitations of nuclear spins in a slice of the examination subject are produced by radiation of respective RF pulses by an RF system of the MR data acquisition unit, said RF system having an RF center frequency, and acquiring MR data from said slice after said at least two successive excitations of the nuclear spins in said slice; and

    shimming said basic magnetic field to achieve a desired homogeneity of said basic magnetic field at least in said measurement volume by, via a computerized control unit, adjusting a shim current in a shim channel of said MR data acquisition unit, together with adjusting said RF center frequency, in order to avoid phase discontinuities between measurement data respectively acquired from said slice after each of said at least two successive excitations.

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