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  Online motion correction for diffusion-weighted imaging using navigator echoes: Application to RARE imaging without sensitivity loss

Norris, D. G., & Driesel, W. (2001). Online motion correction for diffusion-weighted imaging using navigator echoes: Application to RARE imaging without sensitivity loss. Magnetic Resonance in Medicine, 45(5), 729-733. doi:10.1002/mrm.1099.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0010-CDFC-2 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-7D8B-9
Genre: Journal Article

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 Creators:
Norris, David G.1, Author              
Driesel, Wolfgang1, Author              
Affiliations:
1MPI of Cognitive Neuroscience (Leipzig, -2003), The Prior Institutes, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634574              

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 Abstract: This article describes the first application of true online motion correction to diffusion-weighted RARE imaging. Two orthogonal navigator echoes were acquired and zeroth and first-order phase corrections applied in less than 8 ms between a diffusion-weighted magnetization preparation and data acquisition using the RARE sequence. The zeroth-order phase correction was realized by pulsing the system's B(0)-coil: the first-order error corrected with appropriate magnetic field gradient pulses. Online correction ensured that no irreversible signal loss could occur in the imaging experiment. Diffusion-weighted images of the brain were obtained from healthy volunteers. EGG-triggered acquisition was applied at 400 ms after the R-wave. Data were acquired on a matrix of 256 x 256 with a RARE factor of 16 and a b-value of 804 smm(-2). The images obtained with online motion correction showed a remarkably high image quality, while those acquired without motion correction were severely degraded by artifacts.

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Language(s): eng - English
 Dates: 2001
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 239462
ISI: 000168444000001
Other: P6914
DOI: 10.1002/mrm.1099
 Degree: -

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Title: Magnetic Resonance in Medicine
Source Genre: Journal
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Publ. Info: New York : Wiley-Liss
Pages: - Volume / Issue: 45 (5) Sequence Number: - Start / End Page: 729 - 733 Identifier: ISSN: 0740-3194
CoNE: https://pure.mpg.de/cone/journals/resource/954925538149