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US 12,007,460 B2Granted
Actuating a magnetic resonance device with compensated Maxwell phase
AssigneeSiemens Healthineers AG
InventorsMario Zeller, Kun Zhou, Dominik Paul
Life of this patent
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Abstract
A method for actuating a magnetic resonance device according to an MR control sequence, wherein the MR control sequence includes a bipolar gradient pulse between an excitation pulse and a first refocusing pulse, and the bipolar gradient pulse induces a defined Maxwell phase and generates a dephasing gradient moment for a readout gradient.
Claims12
A method for actuating a magnetic resonance (MR) device according to an MR control sequence comprising:
- at least one excitation pulse followed by at least two consecutive refocusing pulses, wherein, between exactly two of the at least two consecutive refocusing pulses, all magnetic field gradients acting on a readout axis of the readout gradient induce a first Maxwell phase and at least one readout gradient is provided;
- and
- a bipolar gradient pulse having a first part and a second part of opposite polarity arranged between the excitation pulse and a first of the at least two consecutive refocusing pulses, wherein a Maxwell phase induced by the bipolar gradient pulse corresponds to between 40% and 60% of the first Maxwell phase, a gradient moment of the bipolar gradient pulse corresponds to a dephasing gradient moment for the readout gradient, and a duration of the bipolar gradient pulse corresponds at most to a first time interval between the excitation pulse and a first of the at least two consecutive refocusing pulses.
Dependencies are inferred from the claim text.