Prospective motion correction enables highest resolution time‐of‐flight angiography at 7T

Mattern, Hendrik; Sciarra, Alessandro; Godenschweger, Frank; Stucht, Daniel; Lüsebrink, Falk; Rose, Georg; Speck, Oliver

doi:10.1002/mrm.27033

Cited by 48 publications

(58 citation statements)

References 63 publications

(112 reference statements)

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“…In the presence of small motion (e.g., respiratory motion or slow head drifts), artifacts are less obvious on QSM, although depiction of small structures such as pial veins in prefrontal regions were considerably improved with PMC (Figure ). Therefore, in line with a recent MR angiography study, these results also highlight the benefits of high resolution and PMC on MR venography.…”

Section: Discussionsupporting

confidence: 89%

“…Long scan durations and small voxel sizes render high resolution MRI vulnerable to small‐scale subject motion. Therefore, motion correction has been applied retrospectively to GRE with isotropic voxel sizes up to 0.35 mm, and prospectively to MPRAGE up to 0.25 mm and 0.15 mm time‐of‐flight angiography . In this study, QSM from GRE data with 0.33 mm isotropic voxel size was reconstructed.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, motion correction has been applied retrospectively to GRE with isotropic voxel sizes up to 0.35 mm, 48 and prospectively to MPRAGE up to 0.25 mm 49 and 0.15 mm time-of-flight angiography. 47 In this study, QSM from GRE data with 0.33 mm isotropic voxel size was reconstructed. Compared to uncorrected QSMs with 0.40 mm isotropic resolution, 1 this corresponds to ~1.8fold decrease in voxel volume.…”

Section: High Resolution Qsmmentioning

confidence: 99%

“…Therefore, scans were repeated (back-to-back) with and without motion correction enabled, the latter to approximate uncorrected data. Although such an approach is widely accepted in this context, 31,47 it is noteworthy that subject motion is not entirely reproducible. Additionally, statistical estimates neglect that motion during the acquisition of low k-space frequencies might have a greater impact on image quality than motion Arrows highlight the habenula (green), mammillothalamic tracts (yellow), anterior thalamic nuclei (blue), and substantia nigra nigrosome 1 (pink).…”

Section: Limitations and Future Workmentioning

confidence: 99%

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Prospective motion correction improves high‐resolution quantitative susceptibility mapping at 7T

Mattern

Sciarra

Lüsebrink

et al. 2018

Magnetic Resonance in Med

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Purpose Recent literature has shown the potential of high‐resolution quantitative susceptibility mapping (QSM) with ultra‐high field MRI for imaging the anatomy, the vasculature, and investigating their magnetostatic properties. Higher spatial resolutions, however, translate to longer scans resulting, therefore, in higher vulnerability to, and likelihood of, subject movement. We propose a gradient‐recalled echo sequence with prospective motion correction (PMC) to address such limitation. Methods Data from 4 subjects were acquired at 7T. The effect of small and large motion on QSM with and without PMC was assessed qualitatively and quantitatively. Full brain QSM and QSM‐based venograms with up to 0.33 mm isotropic voxel size were reconstructed. Results With PMC, motion artifacts in QSM and QSM‐based venograms were largely eliminated, enabling—in both large‐ and small‐amplitude motion regimes—accurate depiction of the cortex, vasculature, and other small anatomical structures that are often blurred as a result of head movement or indiscernible at lower image resolutions. Quantitative analyses demonstrated that uncorrected motion could bias regional susceptibility distributions, a trend that was greatly reduced with PMC. Conclusion Qualitatively, PMC prevented image degradation because of motion artifacts, providing highly detailed QSM images and venograms. Quantitatively, PMC increased the reproducibility of susceptibility measures.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: High Resolution Qsmmentioning

confidence: 99%

Section: Limitations and Future Workmentioning

confidence: 99%

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Prospective motion correction improves high‐resolution quantitative susceptibility mapping at 7T

Mattern

Sciarra

Lüsebrink

et al. 2018

Magnetic Resonance in Med

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“…Using the motion estimates provided by this external hardware, the MR imaging volume's position and orientation can be updated during scanning, therefore, correcting motion prospectively. This technique allowed the highest resolution whole brain in vivo data acquisition, with up to 250 µm and 150 µm isotropic resolution for anatomic and vascular data, respectively. Because of its accuracy and short latency, MPT is often regarded as a gold standard …”

Section: Introductionmentioning

confidence: 99%

Fat navigators and Moiré phase tracking comparison for motion estimation and retrospective correction

Gretsch

Mattern

Gallichan

et al. 2019

Magnetic Resonance in Med

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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 9 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 (2 mm) showed overall better agreement with MPT than 4 mm 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.

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Ultra‐high Field Imaging

CALLOT,

VIGNAUD

2024

The Challenges of MRI

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Prospective motion correction enables highest resolution time‐of‐flight angiography at 7T

Abstract: With PMC enabled, high-resolution TOF is able to visualize brain vasculature beyond the effective resolution limit. Magn Reson Med 80:248-258, 2018. © 2017 International Society for Magnetic Resonance in Medicine.

Cited by 48 publications

References 63 publications

Prospective motion correction improves high‐resolution quantitative susceptibility mapping at 7T

Prospective motion correction improves high‐resolution quantitative susceptibility mapping at 7T

Fat navigators and Moiré phase tracking comparison for motion estimation and retrospective correction

Ultra‐high Field Imaging

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