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โœฆ   LIBER   โœฆ

Gaussian process modeling for image distortion correction in echo planar imaging

โœ Scribed by Joseph W. Stevick; Sally G. Harding; Ulrich Paquet; Richard E. Ansorge; T. Adrian Carpenter; Guy B. Williams

Book ID
102955117
Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
747 KB
Volume
59
Category
Article
ISSN
0740-3194

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โœฆ Synopsis

Abstract

An enhanced method for correction of image distortion due to B~0~โ€field inhomogeneities in echo planar imaging (EPI) is presented. The algorithm is based on the measurement of the point spread function (PSF) associated with each image voxel using a reference scan. The expected distortion map in the phase encode direction is then estimated using a nonparametric inference algorithm known as Gaussian process modeling. The algorithm is shown to be robust to the presence of regions of low signalโ€toโ€noise in the image and large inhomogeneities. Magn Reson Med, 2008. ยฉ 2008 Wileyโ€Liss, Inc.

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