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Nonlinear Regularization for Per Voxel Estimation of Magnetic Susceptibility Distributions From MRI Field Maps

B. Kressler, L. de Rochefort, Tian Liu, P. Spincemaille, Quan Jiang, Yi Wang
2010 IEEE Transactions on Medical Imaging  
Presented here is a technique to estimate arbitrary magnetic susceptibility distributions by solving an ill-posed inversion problem from field maps obtained in an MRI scanner.  ...  Initial experience indicates that the nonlinear regularization better suppresses noise and streaking artifacts common in susceptibility estimation.  ...  CONCLUSION In this work, ℓ 1 and ℓ 2 norm based regularization techniques were developed for magnetic susceptibility estimation from MRI field maps, and were evaluated using numerical simulations, phantom  ... 
doi:10.1109/tmi.2009.2023787 pmid:19502123 pmcid:PMC2874210 fatcat:jn7i3ku4bne4dgsliweo3zsdyq

Quantitative susceptibility mapping (QSM): Decoding MRI data for a tissue magnetic biomarker

Yi Wang, Tian Liu
2014 Magnetic Resonance in Medicine  
In MRI, the main magnetic field polarizes the electron cloud of a molecule, generating a chemical shift for observer protons within the molecule and a magnetic susceptibility inhomogeneity field for observer  ...  Recently, physically meaningful regularizations, including the Bayesian approach, have been developed to enable accurate quantitative susceptibility mapping (QSM) for studying iron distribution, metabolic  ...  ACKNOWLEDGMENTS We thank the members and collaborators of Professor Wang  ... 
doi:10.1002/mrm.25358 pmid:25044035 pmcid:PMC4297605 fatcat:zall27kgbnaezl4glzp7kwalfq

Morphology-adaptive total variation for the reconstruction of quantitative susceptibility map from the magnetic resonance imaging phase

Li Guo, Yingjie Mei, Jijing Guan, Xiangliang Tan, Yikai Xu, Wufan Chen, Qianjin Feng, Yanqiu Feng, Dzung Pham
2018 PLoS ONE  
W, et al. (2018) Morphology-adaptive total variation for the reconstruction of quantitative susceptibility map from the magnetic resonance imaging phase. PLoS ONE 13(5): e0196922.  ...  Quantitative susceptibility mapping (QSM) is a magnetic resonance imaging technique that quantifies the magnetic susceptibility distribution within biological tissues.  ...  Yihao Guo for his assistance on validation. Author Contributions Conceptualization: Yanqiu Feng.  ... 
doi:10.1371/journal.pone.0196922 pmid:29738526 pmcid:PMC5940224 fatcat:pwuz5nbsfzbztpzo7gkmg2z52y

On the sensitivity of quantitative susceptibility mapping for measuring trabecular bone density

Maximilian N. Diefenbach, Jakob Meineke, Stefan Ruschke, Thomas Baum, Alexandra Gersing, Dimitrios C. Karampinos
2018 Magnetic Resonance in Medicine  
To develop a methodological framework to simultaneously measure R 2 * and magnetic susceptibility in trabecularized yellow bone marrow and to investigate the sensitivity of Quantitative Susceptibility  ...  Mapping (QSM) for measuring trabecular bone density using a non-UTE multi-gradient echo sequence.  ...  QSM reconstructs tissue magnetic susceptibility from the phase information of MRI gradient-echo data, 24 which involves three main conceptual steps 14 : (i) estimation of the magnetic field inside the  ... 
doi:10.1002/mrm.27531 pmid:30265769 pmcid:PMC6585956 fatcat:suzlqf26czhy5nm6ozihgohfh4

Computed Inverse Resonance Imaging for Magnetic Susceptibility Map Reconstruction

Zikuan Chen, Vince Calhoun
2012 Journal of computer assisted tomography  
Methods-The forward T2*-weighted MRI (T2*MRI) process is decomposed into two steps: 1) from magnetic susceptibility source to fieldmap establishment via magnetization in a main field, and 2) from fieldmap  ...  Objective-This paper reports on a computed inverse magnetic resonance imaging (CIMRI) model for reconstructing the magnetic susceptibility source from MRI data using a two-step computational approach.  ...  Since the inhomogeneous fieldmap is usually caused by a source of inhomogeneous susceptibility distribution via magnetization in a main field, the inhomogeneous susceptibility map (SM) is considered as  ... 
doi:10.1097/rct.0b013e3182455cab pmid:22446372 pmcid:PMC4347950 fatcat:v3arkvckx5a3vhzu6y35uvdave

Quantitative oxygenation venography from MRI phase

Audrey P. Fan, Berkin Bilgic, Louis Gagnon, Thomas Witzel, Himanshu Bhat, Bruce R. Rosen, Elfar Adalsteinsson
2013 Magnetic Resonance in Medicine  
SvO 2 from QSM is consistent with previous MR susceptometry methods for vessel segments oriented parallel to the main magnetic field.  ...  Methods-Regularized quantitative susceptibility mapping (QSM) is used to reconstruct susceptibility values and estimate SvO 2 in veins.  ...  Current QSM approaches condition the inversion problem of estimating magnetic susceptibility from MRI phase by k-space thresholding of large values in the deconvolution kernel near the magic angle (28  ... 
doi:10.1002/mrm.24918 pmid:24006229 pmcid:PMC4234149 fatcat:eg7i7k7ekbgj7g4h3qukov5sty

MRI estimates of brain iron concentration in normal aging using quantitative susceptibility mapping

Berkin Bilgic, Adolf Pfefferbaum, Torsten Rohlfing, Edith V. Sullivan, Elfar Adalsteinsson
2012 NeuroImage  
Herein, we use recently-developed Quantitative Susceptibility Mapping (QSM) methodology to estimate the tissue magnetic susceptibility based on MRI signal phase.  ...  These regularized approaches solve for the underlying magnetic susceptibility distribution, a sensitive measure of the tissue iron concentration, that gives rise to the observed signal phase.  ...  Acknowledgments National Institutes of Health, Grant numbers NIH R01 EB007942, AG019717, AA005965, AA017168, EB008381; National Science Foundation (NSF), Grant number 0643836; Siemens Healthcare; Siemens-MIT  ... 
doi:10.1016/j.neuroimage.2011.08.077 pmid:21925274 pmcid:PMC3254708 fatcat:6skom6jtlngahoqej3mgiaedry

Microscopic susceptibility anisotropy imaging

Enrico Kaden, Noemi G. Gyori, S. Umesh Rudrapatna, Irina Y. Barskaya, Iulius Dragonu, Mark D. Does, Derek K. Jones, Chris A. Clark, Daniel C. Alexander
2020 Magnetic Resonance in Medicine  
A human pilot study at 3 T demonstrates proxy maps of microscopic susceptibility anisotropy unconfounded by fiber crossings and orientation dispersion as well as magnetic field direction.  ...  properties of tissue microenvironments, especially the myelin microstructure, and (b) the axon orientation distribution relative to the magnetic field.  ...  | INTRODUCTION Gradient-echo magnetic resonance (MR) imaging allows the mapping of the magnetic susceptibility distribution in living tissue.  ... 
doi:10.1002/mrm.28303 pmid:32378746 fatcat:apptu4wlxvgd5i6xaidrfsclmm

Fast nonlinear susceptibility inversion with variational regularization

Carlos Milovic, Berkin Bilgic, Bo Zhao, Julio Acosta-Cabronero, Cristian Tejos
2018 Magnetic Resonance in Medicine  
Purpose: Quantitative susceptibility mapping (QSM) can be performed through the minimization of a functional consisting of data fidelity and regularization terms.  ...  For data consistency, a Gaussian phase-noise distribution is often assumed, which breaks down when SNR is low.  ...  JAC is supported by core funding from the Wellcome, UK [203147/Z/16/Z]. We also thank Hendrik Mattern and Oliver Speck (BMMR, Magdeburg) for providing the 7T dataset.  ... 
doi:10.1002/mrm.27073 pmid:29322560 fatcat:5hoiytaekrbcdbv6ftwwfgyo4i

Implications of tissue magnetic susceptibility-related distortion on the rotating magnet in an MR-linac design

K. Wachowicz, T. Stanescu, S. D. Thomas, B. G. Fallone
2010 Medical Physics (Lancaster)  
While there are straightforward techniques in the literature for correcting distortions from gradient nonlinearities and nonuniform magnetic fields during image reconstruction, the correction of distortions  ...  A finite-difference algorithm was then implemented to solve for magnetic field distortion maps should the anatomies be placed in the uniform polarizing field of an MR system.  ...  The rotation of the magnet complicates matters further, as each B 0 angle will generate a different susceptibility field for the same tissue distributions.  ... 
doi:10.1118/1.3355856 pmid:20443492 fatcat:egbvckheijbgzbgxfkwsj4c3ti

Mean magnetic susceptibility regularized susceptibility tensor imaging (MMSR-STI) for estimating orientations of white matter fibers in human brain

Xu Li, Peter C. M. van Zijl
2014 Magnetic Resonance in Medicine  
Conclusion-The proposed regularization strategy for STI can improve estimation of the susceptibility tensor in white matter.  ...  Here we suggest combined use of limiting the susceptibility anisotropy to white matter and imposing morphology constraints on the mean magnetic susceptibility (MMS) for regularizing the STI inverse problem  ...  Peter van Zijl is a paid lecturer for Philips Healthcare and is the inventor of technology that is licensed to Philips. Dr. Li's salary is supported in part by a grant from Philips Healthcare.  ... 
doi:10.1002/mrm.25322 pmid:24974830 pmcid:PMC4134695 fatcat:zaxejiqwdzh6tjxnxvzgh6lmwe

Joint Estimation and Correction of Geometric Distortions for EPI Functional MRI Using Harmonic Retrieval

H.M. Nguyen, B.P. Sutton, R.L. Morrison, M.N. Do
2009 IEEE Transactions on Medical Imaging  
CONCLUSION In this work, we propose a new, nonterative method for joint estimation (JE) and correction of susceptibility artifacts problem in the case of EPI functional MRI.  ...  We are interested in the SNR of the reconstructed image with and without compensating for the field map and the SNR of the field map recovered from conventional field map estimation and our joint estimation  ... 
doi:10.1109/tmi.2008.2006530 pmid:19244014 fatcat:4q4vr46rzffzdmtm32qkqsnb5e

Ultra-High-Resolution in vitro MRI Study of Age-Related Brain Subcortical Susceptibility Alteration in Rhesus Monkeys at 9.4 T

Qingqing Wen, Hongyi Yang, Jiali Li, Jin Zhang, Haiyang Tong, Qiong Ye, Kai Zhong
2020 Frontiers in Aging Neuroscience  
Awareness of age-related changes in susceptibility is vital for the establishment of a baseline to facilitate the differentiation of pathologic neurodegeneration from healthy aging in non-human primate  ...  This study aimed to quantify the age-related changes in iron concentration in the gray matter of healthy rhesus monkeys using quantitative susceptibility mapping (QSM).  ...  It is well established that the reconstruction of magnetic susceptibility from a field map is an inverse problem.  ... 
doi:10.3389/fnagi.2020.00259 pmid:33013351 pmcid:PMC7461968 fatcat:y2mjpxjanbcrzlraxb7ativqku

Efficient correction of inhomogeneous static magnetic field-induced distortion in Echo Planar Imaging

Dominic Holland, Joshua M. Kuperman, Anders M. Dale
2010 NeuroImage  
However, EPI suffers from severe spatial and intensity distortion due to B 0 field inhomogeneity induced by magnetic susceptibility variations.  ...  These qualities make it desirable for Diffusion Tensor Imaging (DTI), functional MRI (fMRI), and Dynamic Susceptibility Contrast MRI (DSC-MRI).  ...  The terms of this arrangement have been reviewed and approved by the University of California, San Diego in accordance with its conflict of interest policies.  ... 
doi:10.1016/j.neuroimage.2009.11.044 pmid:19944768 pmcid:PMC2819607 fatcat:wlsig3e55jhczed6t3f4mxeqwe

Model-Based Image Reconstruction for MRI

Jeffrey Fessler
2010 IEEE Signal Processing Magazine  
FIELD MAP ESTIMATION For scans with long readout times, the effect of field inhomogeneity Dv 0 in (22) is important.  ...  This possibility has motivated the development of dynamic field mapping methods that estimate the field map separately for each frame in a dynamic study, e.g., [15] .  ... 
doi:10.1109/msp.2010.936726 pmid:21135916 pmcid:PMC2996730 fatcat:jcf4ms5a5ffrlotaw3w7wbofue
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