Eddy current compensation with N-average SSFP imaging
AssigneeUniversitatsklinikum Freiburg
InventorsMichael Markl, Jochen Leupold
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Abstract
A method according to the technique of a steady state free precession (SSFP) gradient echo method, in particular, of nuclear magnetic resonance (NMR) tomography, wherein a regular sequence of radio frequency pulses with flip angle α is applied at temporally constant intervals TR, wherein the phase of these pulses is increased in subsequent steps by a constant phase increment, is characterized in that a predetermined phase encoding scheme is performed in such a manner that each individual phase encoding step is identically repeated N times under the following conditions: N is an even number and N≧2; successive measured NMR signals are averaged, which minimizes the artefacts produced due to incrementation of the phase encoding gradients.
Claims20
Method according to the technique of a steady state free precession (SSFP) gradient echo method, in particular, of nuclear magnetic resonance (NMR) tomography, wherein a regular sequence of radio frequency pulses with flip angle α is applied at temporally constant intervals TR, wherein the phase of these pulses is increased by a constant phase increment in successive steps, characterized in that a predetermined phase encoding scheme is performed in such a manner that each individual phase encoding step is identically repeated N times under the following conditions:
- N is an even number and N≧2, i.e. (N=2, 4, 6, 8, . . . );
- successive measured NMR signals are averaged.
Dependencies are inferred from the claim text.