Toward “plug and play” prospective motion correction for MRI by combining observations of the time varying gradient and static vector fields

Niekerk, Adam van; Kouwe, André van der; Meintjes, Ernesta M.

doi:10.1002/mrm.27790

Cited by 16 publications

(17 citation statements)

References 22 publications

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“…In the future, wireless RF coils could also follow the trend of additional sensor integration, providing a multitude of complementary information during MRI, e.g., patient motion [81,82], to further improve image quality and physiological monitoring. While wireless sensor data transmission often relaxes data rate constraints, efficient power supply and reliable data transmission still have to be ensured.…”

Section: Discussionmentioning

confidence: 99%

Perspectives in Wireless Radio Frequency Coil Development for Magnetic Resonance Imaging

et al. 2020

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This paper addresses the scientific and technological challenges related to the development of wireless radio frequency (RF) coils for magnetic resonance imaging (MRI) based on published literature together with the authors' interpretation and further considerations. Key requirements and possible strategies for the wireless implementation of three important subsystems, namely the MR receive signal chain, control signaling, and on-coil power supply, are presented and discussed. For RF signals of modern MRI setups (e.g., 3 T, 64 RF receive channels), with on-coil digitization and advanced methods for dynamic range (DR ≥ 16-bit) and data rate compression, still data rates > 500 Mbps will be required. For wireless high-speed MR data transmission, 60 GHz WiGig and optical wireless communication appear to be suitable strategies; however, on-coil functionality during MRI scans remains to be verified. Besides RF signals, control signals for on-coil components, e.g., active detuning, synchronization to the MR system, and B 0 shimming, have to be managed. Wireless power supply becomes an important issue, especially with a large amount of additional on-coil components. Wireless power transfer systems (>10 W) seem to be an attractive solution compared to bulky MR-compatible batteries and energy harvesting with low power output. In our opinion, completely wireless RF coils will ultimately become feasible in the future by combining efficient available strategies from recent scientific advances and novel research. Besides ongoing improvement of all three subsystems, innovations are specifically required regarding wireless technologies, MR compatibility, and wireless power supply.

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Section: Discussionmentioning

confidence: 99%

Perspectives in Wireless Radio Frequency Coil Development for Magnetic Resonance Imaging

et al. 2020

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“…Restricted access to state-of-the-art technologies has compelled African neuroscientists to find innovative approaches in pursuit of their research goals. Some have adapted existing technologies and the unique systems around them to build their own equipment ( Kumbol et al, 2018 ; van Niekerk et al, 2019 ); others are developing specialised research methodologies to generate robust, culturally-relevant scientific data on diseases affecting their communities ( Monteiro, 2014 ; Sahlu et al, 2019 ). Many have ventured into medicinal flora research and collaborate with the public and traditional healers to understand the scientific validity of traditional medicine and how it can result in the development of effective and affordable therapy for world diseases ( Abegaz, 2016 ; Maina et al, 2021 ; Terburg et al, 2013 ).…”

Section: Six Domains Of Distinction For Potential Of Neuroscience In ...mentioning

confidence: 99%

What is next in African neuroscience?

Donald

Maina

Patel

et al. 2022

eLife

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Working in Africa provides neuroscientists with opportunities that are not available in other continents. Populations in this region exhibit the greatest genetic diversity; they live in ecosystems with diverse flora and fauna; and they face unique stresses to brain health, including child brain health and development, due to high levels of traumatic brain injury and diseases endemic to the region. However, the neuroscience community in Africa has yet to reach its full potential. In this article we report the outcomes from a series of meetings at which the African neuroscience community came together to identify barriers and opportunities, and to discuss ways forward. This exercise resulted in the identification of six domains of distinction in African neuroscience: the diverse DNA of African populations; diverse flora, fauna and ecosystems for comparative research; child brain health and development; the impact of climate change on mental and neurological health; access to clinical populations with important conditions less prevalent in the global North; and resourcefulness in the reuse and adaption of existing technologies and resources to answer new questions. The article also outlines plans to advance the field of neuroscience in Africa in order to unlock the potential of African neuroscientists to address regional and global mental health and neurological problems.

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“…[14][15][16][17][18] In contrast, external tracking systems use additional hardware, either MR or optical (eg, cameras, light sources, and markers), to estimate motion at a temporal scale in the millisecond range. [19][20][21][22][23][24][25][26] RMC covers a large group of strategies in which the correction of motion takes place after the data acquisition is complete. Methods working in the k-space domain use the estimated motion to update the k-space trajectory in the image reconstruction.…”

Section: Introductionmentioning

confidence: 99%

Comparison of prospective and retrospective motion correction in 3D‐encoded neuroanatomical MRI

Slipsager

Glimberg²,

Højgaard

et al. 2021

Magnetic Resonance in Med

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Purpose: To compare prospective motion correction (PMC) and retrospective motion correction (RMC) in Cartesian 3D-encoded MPRAGE scans and to investigate the effects of correction frequency and parallel imaging on the performance of RMC.Methods: Head motion was estimated using a markerless tracking system and sent to a modified MPRAGE sequence, which can continuously update the imaging FOV to perform PMC. The prospective correction was applied either before each echo train (before-ET) or at every sixth readout within the ET (within-ET). RMC was applied during image reconstruction by adjusting k-space trajectories according to the measured motion. The motion correction frequency was retrospectively increased with RMC or decreased with reverse RMC. Phantom and in vivo experiments were used to compare PMC and RMC, as well as to compare within-ET and before-ET correction frequency during continuous motion. The correction quality was quantitatively evaluated using the structural similarity index measure with a reference image without motion correction and without intentional motion.Results: PMC resulted in superior image quality compared to RMC both visually and quantitatively. Increasing the correction frequency from before-ET to within-ET reduced the motion artifacts in RMC. A hybrid PMC and RMC correction, that is, retrospectively increasing the correction frequency of before-ET PMC to within-ET, also reduced motion artifacts. Inferior performance of RMC

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Toward “plug and play” prospective motion correction for MRI by combining observations of the time varying gradient and static vector fields

Cited by 16 publications

References 22 publications

Perspectives in Wireless Radio Frequency Coil Development for Magnetic Resonance Imaging

Perspectives in Wireless Radio Frequency Coil Development for Magnetic Resonance Imaging

What is next in African neuroscience?

Comparison of prospective and retrospective motion correction in 3D‐encoded neuroanatomical MRI

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