Gallichan, Daniel  ORCID: https://orcid.org/0000-0002-0143-2855, Marques, Jose P. and Gruetter, Rolf
2016.
Retrospective correction of involuntary microscopic head movement using highly accelerated fat image navigators (3D FatNavs) at 7T.
Magnetic Resonance in Medicine
75
(3)
, pp. 1030-1039.
10.1002/mrm.25670
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Abstract
Purpose: The goal of the present study was to use a three- dimensional (3D) gradient echo volume in combination with a fat-selective excitation as a 3D motion navigator (3D FatNav) for retrospective correction of microscopic head motion during high-resolution 3D structural scans of extended duration. The fat excitation leads to a 3D image that is itself sparse, allowing high parallel imaging acceleration factors – with the additional advantage of a minimal disturbance of the water signal used for the host sequence. Methods: A 3D FatNav was inserted into two structural proto- cols: an inversion-prepared gradient echo at 0.33 0.33 1.00 mm resolution and a turbo spin echo at 600 mm isotropic resolution. Results: Motion estimation was possible with high precision, allowing retrospective motion correction to yield clear improvements in image quality, especially in the conspicuity of very small blood vessels. Conclusion: The highly accelerated 3D FatNav allowed motion correction with noticeable improvements in image quality, even for head motion which was small compared with the voxel dimensions of the host sequence.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Engineering |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Publisher: | Wiley |
| ISSN: | 0740-3194 |
| Date of First Compliant Deposit: | 24 January 2018 |
| Date of Acceptance: | 31 January 2015 |
| Last Modified: | 28 Nov 2024 21:00 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/96270 |
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