Toeplitz-based iterative image reconstruction for MRI with correction for magnetic field inhomogeneity. - Jeffrey A. Fessler; Sangwoo Lee; Valur T. Olafsson; Hugo R. Shi; Douglas C. Noll (IEEE Trans. Signal Process., 2005)

Spatial resolution analysis of iterative image reconstruction with separate regularization of real and imaginary parts. - Valur T. Olafsson; Jeffrey A. Fessler; Douglas C. Noll (ISBI, 2006)

Regularized Field Map Estimation in MRI. - Amanda K. Funai; Jeffrey A. Fessler; Desmond Teck Beng Yeo; Valur T. Olafsson; Douglas C. Noll (IEEE Trans. Medical Imaging, 2008)

Fast Joint Reconstruction of Dynamic R2* and Field Maps in Functional MRI. - Valur T. Olafsson; Douglas C. Noll; Jeffrey A. Fessler (IEEE Trans. Medical Imaging, 2008)

Anti-correlated networks, global signal regression, and the effects of caffeine in resting-state functional MRI. - Chi Wah Wong; Valur T. Olafsson; Omer Tal; Thomas T. Liu (NeuroImage, 2012)

The amplitude of the resting-state fMRI global signal is related to EEG vigilance measures. - Chi Wah Wong; Valur T. Olafsson; Omer Tal; Thomas T. Liu (NeuroImage, 2013)

Enhanced identification of BOLD-like components with multi-echo simultaneous multi-slice (MESMS) fMRI and multi-echo ICA. - Valur T. Olafsson; Prantik Kundu; Eric C. Wong; Peter A. Bandettini; Thomas T. Liu (NeuroImage, 2015)

Fast Spatial Resolution Analysis of Quadratic Penalized Least-Squares Image Reconstruction With Separate Real and Imaginary Roughness Penalty: Application to fMRI. - Valur T. Olafsson; Douglas C. Noll; Jeffrey A. Fessler (IEEE Trans. Medical Imaging, 2018)