Gretsch, Frederic, Mattern, Hendrik, Gallichan, Daniel ![]() ![]() |
Preview |
PDF
- Accepted Post-Print Version
Download (6MB) | Preview |
Abstract
Purpose: To compare motion tracking by two modern methods (fat navigators - FatNavs and Moiré phase tracking - MPT) as well as their performance for retrospective correction of very high resolution acquisitions. Methods: A direct comparison of FatNavs and MPT motion parameters was performed for several deliberate motion patterns to estimate the agreement between methods. In addition, two different navigator resolution were applied. 0.5 mm isotropic MP2RAGE images with simultaneous MPT and FatNavs tracking were acquired in nine cooperative subjects with no intentional motion. Retrospective motion corrections based on both tracking modalities were compared qualitatively and quantitatively. The FatNavs impact on quantitative T1 maps was also investigated. Results: Both methods showed good agreement within a 0.3 mm/° margin in subjects that moved very little. Higher resolution FatNavs (2mm) showed overall better agreement with MPT than 4mm resolution ones, except for fast and large motion. The retrospective motion corrections based on MPT or FatNavs were at par in 33 cases out of 36, and visibly improved image quality compared to the uncorrected images. In separate fringe cases, both methods suffered from their respective potential shortcomings: unreliable marker attachment for MPT and poor temporal resolution for FatNavs. The magnetization transfer induced by the navigator RF pulses had a visible impact on the T1 values distribution, with a shift of the gray and white matter peaks of 12 ms at most. Conclusion: This work confirms both FatNavs and MPT as excellent retrospective motion correction methods for very high resolution imaging of cooperative subjects.
Item Type: | Article |
---|---|
Date Type: | Publication |
Status: | Published |
Schools: | Engineering Cardiff University Brain Research Imaging Centre (CUBRIC) |
Subjects: | Q Science > Q Science (General) Q Science > QC Physics R Medicine > R Medicine (General) T Technology > T Technology (General) |
Publisher: | Wiley |
ISSN: | 0740-3194 |
Funders: | Swiss National Science Foundation, NIH, Leenards and Jeantet Foundations |
Date of First Compliant Deposit: | 26 June 2019 |
Date of Acceptance: | 25 June 2019 |
Last Modified: | 19 Nov 2024 16:45 |
URI: | https://orca.cardiff.ac.uk/id/eprint/123753 |
Citation Data
Cited 12 times in Scopus. View in Scopus. Powered By Scopus® Data
Actions (repository staff only)
![]() |
Edit Item |