A new approach to Echo-Planar Imaging (EPI) is
introduced under the name Zigzag-Aligned-Projections (ZAP) that replaces the
blipped phase-encoding (PE) gradient with the modulus of the readout (RO). This
comes with two significant advantages: the reduction of acoustic noise due to
the modified PE gradient and the higher efficiency due to continuous data
sampling. ZAP EPI is the only EPI derivate that combines Cartesian GRAPPA using
a fixed Kernel size with continuous data sampling. The reduction in acoustic noise
was verified experimentally and volunteer images were acquired and processed with
two reconstruction techniques.
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