Valur Olafsson

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Chi Wah (Alec) WongManager and Adjunct Professor, AI in Precision Medicine, City of HopeVerified email at ieee.org
Douglas C. NollProfessor of Biomedical Engineering and Radiology, University of MichiganVerified email at umich.edu
Jeff FesslerProfessor of Electrical Engineering and Computer Science, Univ. of MichiganVerified email at umich.edu
Prantik Kundu, PhDHyperfine Research Inc., Icahn School of Medicine at Mount SinaiVerified email at hyperfine.io
Eric C. WongProfessor of Radiology and Psychiatry, University of California, San DiegoVerified email at ucsd.edu
Peter A. BandettiniChief, Section on Functional Imaging Methods, National Institute of Mental HealthVerified email at nih.gov
TK (Takashi Daniel Yoshida) KozaiErnest E Roth Faculty Fellow & Associate Professor of Bioengineering, Univeristy of PittsburghVerified email at pitt.edu
Alberto VazquezUniversity of PittsburghVerified email at pitt.edu

Valur Olafsson

Technical Director - NUBIC MRI Center, Northeastern University

Verified email at northeastern.edu

Image Reconstruction fMRI Neuroimaging


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The amplitude of the resting-state fMRI global signal is related to EEG vigilance measures CW Wong, V Olafsson, O Tal, TT Liu Neuroimage 83, 983-990, 2013	268	2013
Mechanical failure modes of chronically implanted planar silicon-based neural probes for laminar recording TDY Kozai, K Catt, X Li, ZV Gugel, VT Olafsson, AL Vazquez, XT Cui Biomaterials 37, 25-39, 2015	216	2015
Toeplitz-based iterative image reconstruction for MRI with correction for magnetic field inhomogeneity JA Fessler, S Lee, VT Olafsson, HR Shi, DC Noll IEEE Transactions on Signal Processing 53 (9), 3393-3402, 2005	178	2005
Regularized field map estimation in MRI AK Funai, JA Fessler, DTB Yeo, VT Olafsson, DC Noll IEEE transactions on medical imaging 27 (10), 1484-1494, 2008	169	2008
Anti-correlated networks, global signal regression, and the effects of caffeine in resting-state functional MRI CW Wong, V Olafsson, O Tal, TT Liu Neuroimage 63 (1), 356-364, 2012	138	2012
Enhanced identification of BOLD-like components with multi-echo simultaneous multi-slice (MESMS) fMRI and multi-echo ICA V Olafsson, P Kundu, EC Wong, PA Bandettini, TT Liu Neuroimage 112, 43-51, 2015	68	2015
Maturation of the human striatal dopamine system revealed by PET and quantitative MRI B Larsen, V Olafsson, F Calabro, C Laymon, B Tervo-Clemmens, ... Nature Communications 11 (1), 846, 2020	67	2020
Fast Joint Reconstruction of Dynamicand Field Maps in Functional MRI VT Olafsson, DC Noll, JA Fessler IEEE transactions on medical imaging 27 (9), 1177-1188, 2008	65	2008
Caffeine-induced global reductions in resting-state BOLD connectivity reflect widespread decreases in MEG connectivity O Tal, M Diwakar, CW Wong, V Olafsson, R Lee, MX Huang, TT Liu Frontiers in human neuroscience 7, 63, 2013	40	2013
Resting-state fMRI activity predicts unsupervised learning and memory in an immersive virtual reality environment CW Wong, V Olafsson, M Plank, J Snider, E Halgren, H Poizner, TT Liu PLoS One 9 (10), e109622, 2014	37	2014
Spectral‐spatial pulse design for through‐plane phase precompensatory slice selection in T‐weighted functional MRI CY Yip, D Yoon, V Olafsson, S Lee, WA Grissom, JA Fessler, DC Noll Magnetic Resonance in Medicine: An Official Journal of the International …, 2009	34	2009
Dopamine-related striatal neurophysiology is associated with specialization of frontostriatal reward circuitry through adolescence AC Parr, F Calabro, B Larsen, B Tervo-Clemmens, S Elliot, W Foran, ... Progress in Neurobiology 201, 101997, 2021	28	2021
Greater preference consistency during the Willingness-to-Pay task is related to higher resting state connectivity between the ventromedial prefrontal cortex and the ventral … S Mackey, V Olafsson, RL Aupperle, K Lu, GA Fonzo, J Parnass, T Liu, ... Brain imaging and behavior 10, 730-738, 2016	10	2016
Dynamic update of R2* and field map in fMRI V Olafsson, JA Fessler, DC Noll Proc. Intl. Soc. Mag. Res. Med, 45, 2004	10	2004
Fast Spatial Resolution Analysis of Quadratic Penalized Least-Squares Image Reconstruction with Separate Real and Imaginary Roughness Penalty: Application to fMRI VT Olafsson, DC Noll, JA Fessler IEEE Transactions on Medical Imaging, 2017	8	2017
Spatial resolution analysis of iterative image reconstruction with separate regularization of real and imaginary parts V Olafsson, JA Fessler, DC Noll 3rd IEEE International Symposium on Biomedical Imaging: Nano to Macro, 2006 …, 2006	7	2006
High spatial and temporal resolution fcMRI with BOLD selectivity using multiecho simultaneous multislice EPI V Olafsson, J Guo, CW Wong, P Kundu, S Inati, WM Luh, ... Proceedings of the 20th ISMRM 2068, 2012	4	2012
New approach for estimating dR2* in fMRI VT Olafsson, DC Noll, JA Fessler ISMRM Ninth Scientific Meeting, 132, 2003	4	2003
Resting-state fMRI activity in the basal ganglia predicts unsupervised learning performance in a virtual reality environment CW Wong, V Olafsson, M Plank, J Snider, E Halgren, H Poizner, T Liu 2013 6th International IEEE/EMBS Conference on Neural Engineering (NER …, 2013	3	2013
Improved detection of BOLD-like independent components with multi-echo simultaneous multi-slice acquisitions and multi-echo ICA V Olafsson, P Kundu, CW Wong, J Guo, K Lu, E Ghobrial, P Bandettini, ... 22nd Annual Scientific Meeting of the International Society for Magnetic …, 2014	2	2014

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