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MAGNETIC RESONANCE SPECTROSCOPY WITH PHASE ROTATION

  • US 20150241532A1
  • Filed: 02/25/2015
  • Published: 08/27/2015
  • Est. Priority Date: 02/26/2014
  • Status: Active Grant
First Claim
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1. A method for acquiring a magnetic resonance (MR) signal from an examination subject, comprising:

  • operating an MR data acquisition unit, comprising a radio-frequency (RF) transmitter and a gradient coil system and an RF receiver, according to a pulse sequence, while an examination subject is situated in the MR data acquisition unit;

    in said pulse sequence, operating said RF transmitter to radiate a first RF pulse, having a first phase, while simultaneously operating said gradient coil system to activate a gradient magnetic field in a first direction;

    in said pulse sequence, operating said RF transmitter to radiate a second RF pulse, having a second phase and to radiate a third RF pulse, having a third phase, while simultaneously operating said gradient coil system to activate a gradient magnetic field in a second direction;

    in said pulse sequence, operating said RF transmitter to radiate a fourth RF pulse, having a fourth phase, and a fifth RF pulse having a fifth phase, while simultaneously operating said gradient coil system to activate a gradient magnetic field in a third direction;

    in said pulse sequence, operating said RF receiver to acquire an MR signal from said examination subject resulting from a state of excitation of nuclear spins in the examination subject produced by a combination of said first, second, third, fourth and fifth RF pulses, and entering the acquired MR signal into an electronic memory;

    operating said MR data acquisition unit by repeating said pulse sequence a plurality of times with a phase rotation of said first, second, third, fourth and fifth phases in each repetition, with said third and fourth phases being the same in each repetition, and thereby compiling a set of MR signals in said electronic memory respectively resulting from each repetition; and

    making said set of MR signals in said electronic memory available from said memory in electronic form as a data file for further processing thereof.

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