Technical note
Image reconstruction of sequentially sampled echo-planar data

https://doi.org/10.1016/0730-725X(94)00068-EGet rights and content
Under a Creative Commons license
open archive

Abstract

For echo-planar imaging (EPI), failure to time-reverse alternate echoes results in aliasing in the image. We encountered image artifacts in EPI acquired on a system with sequential sampling. After examining the source of these image artifacts, we concluded that the artifacts were a result of the type of sampling method used in data acquisition and the way the time-reversal of alternate echoes was carried out prior to Fourier transformation. Two methods are demonstrated to obtain artifact-free EPI with sequential data sampling.

Keywords

Magnetic resonance imaging
Echo-planar imaging
Image reconstruction
Sequential sampling
Simultaneous sampling
k-Space trajectory
Time-reversal
Gradient-echo

Cited by (0)

§

Present address: MRC, John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK.