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. Author manuscript; available in PMC: 2010 Mar 9.
Published in final edited form as: Magn Reson Med. 2009 Feb;61(2):457–461. doi: 10.1002/mrm.21832

FIG. 1.

FIG. 1

Gradient moment nulling scheme. a: During readout, gradient , weights are distributed (indicated by the arrows on the right). b: By the time the echo is formed, if these weights are symmetrically distributed, flow compensation is achieved. c: Spiral readouts for MRSI can be modified to achieve this symmetric weighting by using an out–in trajectory.