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Cine mr imaging method and apparatus

  • US 5,042,485 A
  • Filed: 05/31/1989
  • Issued: 08/27/1991
  • Est. Priority Date: 06/07/1988
  • Status: Expired due to Term
First Claim
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1. A method of imaging a moving portion in an object implemented by a magnetic resonance imaging apparatus which comprises a means for generating a static magnetic field, a gradient magnetic field and a radio frequency field to excite the object;

  • a means for measuring nuclear magnetic resonance signals from the object under test, and means for performing various computations, including image reconstruction from said measured signals, wherein said method comprises the steps of;

    measuring a plurality of positions of the moving portion in said object;

    changing excitation positions to be excited by the radio frequency field in accordance with the result of said position measurement;

    measuring resonance signals from said excitation positions;

    reconstructing images from said measured resonance signals and displaying said images on a display, wherein said step of changing the excitation position includes at least one of varying the frequency of said radio frequency field and varying the amplitude characteristics of said gradient magnetic field.

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