[HTML][HTML] SyMRI of the brain: rapid quantification of relaxation rates and proton density, with synthetic MRI, automatic brain segmentation, and myelin measurement

…, M Warntjes, M Hori, C Andica, M Nakazawa… - Investigative …, 2017 - journals.lww.com
… In the first phase, a slice-selective saturation pulse with flip angle θ acts on a slice m,
followed by spoiling of the signal (“saturation”). In the second phase, a slice-selective turbo spin-…

[HTML][HTML] Simultaneous three-dimensional myocardial T1 and T2 mapping in one breath hold with 3D-QALAS

S Kvernby, MJB Warntjes, H Haraldsson… - Journal of …, 2014 - Elsevier
… Δt according to: 1 M n + 1 = M 0 − M 0 − M n ⋅ e − Δ t T 1 … M 2 -M 3 , M 6 –M 7 , M 8 –M 9 ,
M 10 –M 11 and M 12 –M 13 . … M 0 * which can be described by: 2 T 1 * T 1 = M 0 * M 0 = 1 − e …

[HTML][HTML] Modeling the presence of myelin and edema in the brain based on multi-parametric quantitative MRI

M Warntjes, M Engström, A Tisell, P Lundberg - Frontiers in neurology, 2016 - frontiersin.org
M MY , M CL , M FW , and M EPW , respectively. The evolution of each magnetization M i =
M x M y M z i T was calculated in small time-steps t, where each sequential magnetization M i,…

[HTML][HTML] Myelin Measurement: Comparison Between Simultaneous Tissue Relaxometry, Magnetization Transfer Saturation Index, and T1w/T2w Ratio Methods

A Hagiwara, M Hori, K Kamagata, M Warntjes… - Scientific reports, 2018 - nature.com
… E S and M S are the mode intensity values of each subject’s eye and muscle masks,
respectively, and E R and M R show the reference values in template images of eye and muscle …

[HTML][HTML] Three-dimensional high-resolution simultaneous quantitative mapping of the whole brain with 3D-QALAS: an accuracy and repeatability study

S Fujita, A Hagiwara, M Hori, M Warntjes… - Magnetic resonance …, 2019 - Elsevier
… a b , Akifumi Hagiwara a , Masaaki Hori c , Marcel Warntjes d e , Koji Kamagata a , Issei
Fukunaga a , … Marcel Warntjes is currently employed part-time at SyntheticMR and has a stock in …

Magnetic resonance imaging goes postmortem: noninvasive detection and assessment of myocardial infarction by postmortem MRI

C Jackowski, MJB Warntjes, J Berge, W Bär… - European …, 2011 - Springer
Objective To investigate the performance of postmortem magnetic resonance imaging (pmMRI)
in identification and characterization of lethal myocardial infarction in a non-invasive …

Validation of rapid magnetic resonance myelin imaging in multiple sclerosis

R Ouellette, G Mangeat, I Polyak, M Warntjes… - Annals of …, 2020 - Wiley Online Library
Objective Magnetic resonance imaging (MRI) is essential for multiple sclerosis diagnostics
but is conventionally not specific to demyelination. Myelin imaging is often hampered by long …

Gd2O3 nanoparticles in hematopoietic cells for MRI contrast enhancement

…, H Gustafsson, N Abrikossova, M Warntjes… - International journal …, 2011 - Taylor & Francis
… with 0.1 M sodium cacodylate and 0.1 M sucrose, pH 7.2. After fixation, cells were rinsed
in 0.15 M sodium cacodylate buffer and postfixed in 1% osmium tetroxide in 0.15 M sodium …

3D quantitative synthetic MRI‐derived cortical thickness and subcortical brain volumes: Scan–rescan repeatability and comparison with conventional T1‐weighted …

S Fujita, A Hagiwara, M Hori, M Warntjes… - Journal of Magnetic …, 2019 - Wiley Online Library
Background Previous quantitative synthetic MRI of the brain has been solely performed in
2D. Purpose To evaluate the feasibility of the recently developed sequence 3D‐QALAS for …

Evaluation of automatic measurement of the intracranial volume based on quantitative MR imaging

…, A Wåhlin, E Petterson, MJB Warntjes… - American Journal …, 2012 - Am Soc Neuroradiology
BACKGROUND AND PURPOSE: Brain size is commonly described in relation to ICV,
whereby accurate assessment of this quantity is fundamental. Recently, an optimized MR …