| 摘要 |
<p>A method (10) of suppressing a first chemical species in a subject in MR imaging includes generating a first spiral trajectory in k-space which acquires the center of the spiral (12), and generating a second spiral trajectory in k-space retraversing a portion of the first spiral trajectory to the center (14), after a delay, wherein the delay is the time required for the first chemical species to rotate out of phrase with a second chemical species in the subject. The method further includes combining the first and second spiral trajectories to suppress the signal of the first chemical species in the portion of k-space defined by second spiral trajectory, (16) and repeating the steps of generating the first and second spiral trajectories to form a plurality of trajectory interleaf pairs each covering a different portion of k-space (18). An MR image is generated using the trajectory interleaf pairs in which the first chemical species is suppressed relative to the second chemical species (20).</p> |
