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Can 7T MPRAGE match MP2RAGE for gray-white matter contrast?

Ícaro A.F. Oliveira, Thomas Roos, Serge O. Dumoulin, Jeroen C.W. Siero, Wietske van der Zwaag
2021 NeuroImage  
It provides excellent contrast between gray and white matter and is widely used for brain segmentation.  ...  Overall, the gray-white matter contrast from MP2RAGE is higher, with higher CNR and higher intensity peak distances, even when scaled to scan time.  ...  Our results show that the MPRAGE does not yet match MP2RAGE for gray-white matter contrast, even after a robust SNR increase using sophisticated alternative pulses.  ... 
doi:10.1016/j.neuroimage.2021.118384 pmid:34265419 fatcat:sv2qcon57naexooymfofez6ufq

Multi T1-weighted contrast imaging and T1 mapping with Compressed sensing FLAWS at 3T [article]

Jeremy Beaumont, Jurgen Fripp, Parnesh Raniga, Oscar Acosta, Jean-Christophe Ferre, Katie McMahon, Julie Trinder, Tobias Kober, Giulio Gambarota
2021 bioRxiv   pre-print
The Fluid And White matter Suppression (FLAWS) MRI sequence allows for the acquisition of multiple T1-weighted contrasts in a single sequence acquisition.  ...  In addition, this study demonstrates for the first time that T1-weighted imaging with low B1 sensitivity and T1 mapping can be performed with the FLAWS sequence at 3T for both GRAPPA and CS reconstructions  ...  We are also grateful to the team at the Herston Imaging Research Facility for their generous scan time allowances and technical support acquiring the data presented here.  ... 
doi:10.1101/2021.12.18.473283 fatcat:fe4pvj4h55dmvkbns6utzsjs6e

Layer-dependent multiplicative effects of spatial attention on contrast responses in human early visual cortex [article]

Fanhua Guo, Chengwen Liu, Chencan Qian, Zihao Zhang, Kaibao Sun, Danny JJ Wang, Sheng He, Peng Zhang
2020 bioRxiv   pre-print
Using submillimeter-resolution fMRI at 7T, we investigated the effects of top-down spatial attention on the contrast responses across different cortical depths in human early visual cortex.  ...  Attention modulation of low contrast response was strongest in the middle cortical depths, indicating baseline enhancement or contrast gain of attention modulation on feedforward input.  ...  T1 MP2RAGE image shows good contrast between gray matter and white matter, and was primarily used to define the WM surface.  ... 
doi:10.1101/2020.02.01.926303 fatcat:dv5ql3ufkjh3taihkxabioeafq

Distortion-matched T 1 maps and unbiased T 1 -weighted images as anatomical reference for high-resolution fMRI

Wietske van der Zwaag, Pieter F. Buur, Alessio Fracasso, Tessa van Doesum, Kâmil Uludağ, Maarten J. Versluis, José P. Marques
2018 NeuroImage  
A B S T R A C T The increasing availability of ultra-high field scanners has led to a growing number of submillimetre fMRI studies in humans, typically targeting the gray matter at different cortical depths  ...  Thus, the T 1 23DEPI T 1 -weighted images and T 1 -maps can be used to provide cortical surfaces with matched distortions to the functional data or else to facilitate co-registration between functional  ...  Acknowledgements The authors would like to thank Ritu Bhandari for sharing data and Pierre-Louis Bazin and Christian Keysers for useful discussions.  ... 
doi:10.1016/j.neuroimage.2018.04.026 pmid:29665420 fatcat:4etyxcujp5cyjhtj7iqz75iune

Quantitative comparison of cortical surface reconstructions from MP2RAGE and multi-echo MPRAGE data at 3 and 7T

Kyoko Fujimoto, Jonathan R. Polimeni, André J.W. van der Kouwe, Martin Reuter, Tobias Kober, Thomas Benner, Bruce Fischl, Lawrence L. Wald
2014 NeuroImage  
The Magnetization-Prepared 2 Rapid Acquisition Gradient Echo (MP2RAGE) method achieves spatially uniform contrast across the entire brain between gray matter and surrounding white matter tissue and cerebrospinal  ...  0.19 mm (or 8%) for the MP2RAGE data.  ...  Acknowledgments Support for this research was provided in part by the NIH National Institute for Biomedical Imaging and Bioengineering (R01-EB006758, P41-EB015896, K01-EB011498 and R01-EB006847), the National  ... 
doi:10.1016/j.neuroimage.2013.12.012 pmid:24345388 pmcid:PMC4035370 fatcat:rqzujpenxzcanovzgby36kncmu

Individual Differences in the Alignment of Structural and Functional Markers of the V5/MT Complex in Primates

I. Large, H. Bridge, B. Ahmed, S. Clare, J. Kolasinski, W. W. Lam, K. L. Miller, T. B. Dyrby, A. J. Parker, J. E. T. Smith, G. Daubney, J. Sallet (+2 others)
2016 Cerebral Cortex  
Myelination is directly identifiable from postmortem histology but also indirectly by image contrast with structural magnetic resonance imaging (sMRI).  ...  A section-by-section comparison of histological slices with in vivo and postmortem sMRI for the same block of cortical tissue showed precise correspondence in localizing heavy myelination for V5/MT and  ...  We would like to thank Kathy Murphy and Caroline Bergmann for invaluable anesthetic support and the BMS team for expert animal care. Conflict of Interest: None declared.  ... 
doi:10.1093/cercor/bhw180 pmid:27371764 pmcid:PMC5028002 fatcat:ufh6t3rzszbjnm4zp7q2x56txi

Imaging gray matter with concomitant null point imaging from the phase sensitive inversion recovery sequence

Olivier Mougin, Rasha Abdel-Fahim, Robert Dineen, Alain Pitiot, Nikos Evangelou, Penny Gowland
2015 Magnetic Resonance in Medicine  
/white matter boundary and minimal partial volume effects.  ...  detect and classify abnormalities in cortical gray matter.  ...  of the whole cortex with isotropic high spatial resolution, and to provide high contrast between gray matter (GM) and white matter (WM) as well as within the cortex.  ... 
doi:10.1002/mrm.26061 pmid:26599705 pmcid:PMC5082579 fatcat:jgtjeovxprfp5gw4nyixmcjvty

Insights from Ultrahigh Field Imaging in Multiple Sclerosis

Matthew K. Schindler, Pascal Sati, Daniel S. Reich
2017 Neuroimaging clinics of North America  
The increase in magnetic susceptibility effects inherent to ultrahigh field can be used to detect pathological features of MS lesions including a central vein, potentially useful for diagnostic considerations  ...  The improved spatial resolution and anatomical detail are due to the increase in signal-to-noise and contrast-to-noise ratio at higher magnetic field strengths.  ...  Martina Absinta for her help in editing figures included in the manuscript.  ... 
doi:10.1016/j.nic.2016.12.006 pmid:28391792 pmcid:PMC5453514 fatcat:aftjlfohtndrhfsp5mhstsxdju

The impact of B1+ correction on MP2RAGE cortical T1 and apparent cortical thickness at 7T

Roy A.M. Haast, Dimo Ivanov, Kâmil Uludağ
2018 Human Brain Mapping  
Specifically, anatomical MRI relying on T 1 contrast may be unreliable due to spatially variable image contrast between gray matter (GM), white matter (WM) and cerebrospinal fluid (CSF).  ...  7T) MRI, transmit and receive B 1 -related image inhomogeneities can hamper correct classification of tissue types.  ...  the brain into gray (GM) and white matter (WM).  ... 
doi:10.1002/hbm.24011 pmid:29457319 pmcid:PMC5969159 fatcat:jf5lndzx7jchtazmyax2jmomvy

Radiological and Clinical Value of 7T MRI for Evaluating 3T-Visible Lesions in Pharmacoresistant Focal Epilepsies

Z Irene Wang, Se-Hong Oh, Mark Lowe, Mykol Larvie, Paul Ruggieri, Virginia Hill, Volodymyr Statsevych, Doksu Moon, Jonathan Lee, Todd Emch, James Bena, Ingmar Blümcke (+4 others)
2021 Frontiers in Neurology  
, gray-white tissue contrast, artifacts, and the most helpful sequence for diagnosis.  ...  Chance-adjusted agreement was within the fair range for lesion presence, conspicuity and boundary. Gray-white contrast was significantly improved at 7T (p < 0.001).  ...  Ken Sakaie for the acquisition of 7T studies.  ... 
doi:10.3389/fneur.2021.591586 pmid:33737901 pmcid:PMC7960771 fatcat:44bcsjasurdc3fguwzy5wwv2my

Biexponential longitudinal relaxation in white matter: Characterization and impact on T1mapping with IR-FSE and MP2RAGE

James A. Rioux, Ives R. Levesque, Brian K. Rutt
2015 Magnetic Resonance in Medicine  
For MP2RAGE, significant differences (90 ms at 3T, 125 ms at 7T) remain at all parameter values.  ...  For IR-FSE, acquiring four TIs with a minimum of 150 ms (3T) or 200 ms (7T) yielded monoexponential T 1 estimates that match the long component to within 10 ms.  ...  This image was used because the WM signal is approximately nulled and the white/gray contrast is highest. Seeds were manually chosen until most of the WM was included.  ... 
doi:10.1002/mrm.25729 pmid:26190230 pmcid:PMC4837078 fatcat:xcrtnjny5vfijbrm74xowl3v3e

Blood-brain barrier breakdown in non-enhancing multiple sclerosis lesions detected by 7-Tesla MP2RAGE ΔT1 mapping

Seongjin Choi, Margaret Spini, Jun Hua, Daniel M Harrison
2021 PLoS ONE  
ΔT1 values were interrogated in enhancing white matter lesions (ELs), non-enhancing white matter lesions (NELs), and normal appearing white matter (NAWM) and metrics were compared to clinical data.  ...  Measurement of the changes in T1 relaxation time caused by contrast on 7T MP2RAGE reveals clinically relevant evidence of BBB breakdown in NELs in MS.  ...  the ability to visualize white and gray matter lesions [11, 12] .  ... 
doi:10.1371/journal.pone.0249973 pmid:33901207 pmcid:PMC8075220 fatcat:fepe63frvjdndgapog66fhwubu

Effects of MP2RAGE B1+ sensitivity on inter-site T1 reproducibility and morphometry at 7T [article]

Roy AM Haast, Jonathan C Lau, Dimo Ivanov, Ravi S Menon, Kamil Uludag, Ali R Khan
2020 bioRxiv   pre-print
In contrast, quantitative imaging using the MP2RAGE sequence, for example, allows direct characterization of the brain based on the tissue property of interest.  ...  However, specific MP2RAGE parameters choices − e.g., to emphasize intracortical myelin-dependent contrast variations − can substantially impact image quality and cortical analyses through remnants of B1  ...  A computational framework for ultra-high resolution cortical segmentation at 7Tesla. Neuroimage 93 Pt 2,  ... 
doi:10.1101/2020.02.13.947382 fatcat:65tiekoj7badbmjdcbzcudlhou

Investigation of lateral geniculate nucleus volume and diffusion tensor imaging in patients with normal tension glaucoma using 7 tesla magnetic resonance imaging

Manuel A. Schmidt, Michael Knott, Robin Heidemann, Georg Michelson, Tobias Kober, Arnd Dörfler, Tobias Engelhorn, Sanjoy Bhattacharya
2018 PLoS ONE  
Instead, we used a superior MP2RAGE sequence which has an improved gray/white matter contrast allowing to identify the LGN [25] .  ...  Anatomical information was obtained through a high-resolution 3D MP2RAGE (Magnetization Prepared 2 Rapid Acquisition Gradient Echoes) [20] which improves the gray/white matter contrast (0.8 mm isotropic  ... 
doi:10.1371/journal.pone.0198830 pmid:29879191 pmcid:PMC5991727 fatcat:rue5zzj36rg63g2mrofo6enogm

Ultra-high field magnetic resonance imaging in human epilepsy: a systematic review

R.H.G.J. van Lanen, A.J. Colon, C.J. Wiggins, M.C. Hoeberigs, G. Hoogland, A. Roebroeck, D. Ivanov, B.A. Poser, R.P.W. Rouhl, P.A.M. Hofman, J.F.A. Jansen, W. Backes (+2 others)
2021 NeuroImage: Clinical  
Resective epilepsy surgery is an evidence-based curative treatment option for patients with drug-resistant focal epilepsy.  ...  Seizure freedom was achieved in 73% of operated patients; no seizure outcome comparison was made between 7T MRI positive, 7T negative and 3T positive patients. 7T could influence surgical decision-making  ...  Drenthen PhD for their contribution. Funding This work was supported by the Dutch epilepsy foundation (Epilepsiefonds, with grant number [WAR project number 2020-09].  ... 
doi:10.1016/j.nicl.2021.102602 pmid:33652376 fatcat:6das6pxbbvfmdmejhtlbbgopde
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