Enhanced quantitative susceptibility mapping (QSM) using real‐time field control

Özbay, Pinar Senay; Duerst, Yolanda; Wilm, Bertram J.; Pruessmann, Klaas P.; Nanz, Daniel

doi:10.1002/mrm.26735

Cited by 10 publications

(12 citation statements)

References 30 publications

(41 reference statements)

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“…Several alternative approaches have been developed, primarily for susceptibility-based imaging at 7 T, in which respiratory-induced field changes are significant. 30 The field changes may be measured using multichannel FID navigators, 4 respiratory signal correlated to a reference scan, 31 NMR field probes, [32][33][34][35] navigator echoes, 36,37 image navigators, [38][39][40] or the mismatch between image data and coilsensitivity profiles. 41 Correction may then be implemented by real-time shimming [31][32][33][34]36 or retrospectively during reconstruction.…”

Section: Discussionmentioning

confidence: 99%

Motion‐insensitive susceptibility weighted imaging

Berglund

Sprenger

Niekerk

et al. 2021

Magnetic Resonance in Med

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Section: Discussionmentioning

confidence: 99%

Motion‐insensitive susceptibility weighted imaging

Berglund

Sprenger

Niekerk

et al. 2021

Magnetic Resonance in Med

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“…However, the long, high resolution acquisitions are susceptible to motion artifacts, especially in possible applications to study disease or large populations. Interleaving the acquisition with fat image navigators (Gallichan & Marques, ) or using real‐time field control (Özbay, Duerst, Wilm, Pruessmann, & Nanz, ) would be candidate approaches to correct for motion artifacts either retrospectively or prospectively.…”

Section: Discussionmentioning

confidence: 99%

MP2RAGEME: T₁, T₂^*, and QSM mapping in one sequence at 7 tesla

Caan

Bazin

Marques

et al. 2018

Human Brain Mapping

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Quantitative magnetic resonance imaging generates images of meaningful physical or chemical variables measured in physical units that allow quantitative comparisons between tissue regions and among subjects scanned at the same or different sites. Here, we show that we can acquire quantitative T1, T2*, and quantitative susceptibility mapping (QSM) information in a single acquisition, using a multi‐echo (ME) extension of the second gradient‐echo image of the MP2RAGE sequence. This combination is called MP2RAGE ME, or MP2RAGEME. The simultaneous acquisition results in large time savings, perfectly coregistered data, and minimal image quality differences compared to separately acquired data. Following a correction for residual transmit B1+‐sensitivity, quantitative T1, T2*, and QSM values were in excellent agreement with those obtained from separately acquired, also B1+‐corrected, MP2RAGE data and ME gradient echo data. The quantitative values from reference regions of interests were also in very good correspondence with literature values. From the MP2RAGEME data, we further derived a multiparametric cortical parcellation, as well as a combined arterial and venous map. In sum, our MP2RAGEME sequence has the benefit in large time savings, perfectly coregistered data and minor image quality differences.

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“…The former can be addressed retrospectively . In addition, real‐time field‐control has been used to correct for spatiotemporal magnetic field fluctuations in QSM . Alternatively, navigators have also been successfully applied to correct for physiological field fluctuations .…”

Section: Discussionmentioning

confidence: 99%

“…52 In addition, real-time field-control has been used to correct for spatiotemporal magnetic field fluctuations in QSM. 53 Alternatively, navigators have also been successfully applied to correct for physiological field fluctuations. 54 Because PMC cannot correct for changes in the magnetic field, however, potential residual field perturbation could have biased the present results.…”

Section: Limitations and Future Workmentioning

confidence: 99%

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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Enhanced quantitative susceptibility mapping (QSM) using real‐time field control

Abstract: Real-time FC improved the delineation of brain structures and the match of susceptibility values with reference values obtained without FP. Magn Reson Med 79:770-778, 2018. © 2017 International Society for Magnetic Resonance in Medicine.

Cited by 10 publications

References 30 publications

Motion‐insensitive susceptibility weighted imaging

Motion‐insensitive susceptibility weighted imaging

MP2RAGEME: T₁, T₂^*, and QSM mapping in one sequence at 7 tesla

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

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Enhanced quantitative susceptibility mapping (QSM) using real‐time field control

Abstract: Real-time FC improved the delineation of brain structures and the match of susceptibility values with reference values obtained without FP. Magn Reson Med 79:770-778, 2018. © 2017 International Society for Magnetic Resonance in Medicine.

Cited by 10 publications

References 30 publications

Motion‐insensitive susceptibility weighted imaging

Motion‐insensitive susceptibility weighted imaging

MP2RAGEME: T1, T2*, and QSM mapping in one sequence at 7 tesla

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

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MP2RAGEME: T₁, T₂^*, and QSM mapping in one sequence at 7 tesla