Iterative static field map estimation for off-resonance correction in non-Cartesian susceptibility weighted imaging. [PDF]
Magn Reson Med, 2022 Patient‐induced inhomogeneities in the magnetic field cause distortions and blurring during acquisitions with long readouts such as in susceptibility‐weighted imaging (SWI). Most correction methods require collecting an additional ΔB0$$ \Delta {\mathrm{B}
Daval-Frérot G +5 more
europepmc +2 more sources
Field Map Reconstruction in Magnetic Resonance Imaging Using Bayesian Estimation
Sensors, 2009 Field inhomogeneities in Magnetic Resonance Imaging (MRI) can cause blur or image distortion as they produce off-resonance frequency at each voxel. These effects can be corrected if an accurate field map is available. Field maps can be estimated starting
Fabio Baselice +2 more
doaj +2 more sources
Regularized Field Map Estimation in MRI [PDF]
IEEE Transactions on Medical Imaging, 2008 In fast magnetic resonance (MR) imaging with long readout times, such as echo-planar imaging (EPI) and spiral scans, it is important to correct for the effects of field inhomogeneity to reduce image distortion and blurring. Such corrections require an accurate field map, a map of the off-resonance frequency at each voxel.
Funai, Amanda K. +4 more
openaire +4 more sources
Simultaneous changes in visual acuity, cortical population receptive field size, visual field map size, and retinal thickness in healthy human aging. [PDF]
Brain Struct Funct, 2021 Healthy human aging is associated with a deterioration of visual acuity, retinal thinning, visual field map shrinkage and increasing population receptive field sizes.
Silva MF +7 more
europepmc +2 more sources
Efficient Regularized Field Map Estimation in 3D MRI. [PDF]
IEEE Trans Comput Imaging, 2020 Magnetic field inhomogeneity estimation is important in some types of magnetic resonance imaging (MRI), including field-corrected reconstruction for fast MRI with long readout times, and chemical shift based water-fat imaging.
Lin CY, Fessler JA.
europepmc +3 more sources
A twisted visual field map in the primate dorsomedial cortex predicted by topographic continuity. [PDF]
Sci Adv, 2020 Twisted visual maps emerge from a model that balances topographical continuity within and between areas. Adjacent neurons in visual cortex have overlapping receptive fields within and across area boundaries, an arrangement theorized to minimize wiring ...
Yu HH +4 more
europepmc +2 more sources
Development of intravoxel inhomogeneity correction for chemical exchange saturation transfer spectral imaging: a high-resolution field map-based deconvolution algorithm for magnetic field inhomogeneity correction. [PDF]
Magn Reson Med, 2020 CEST MRI is sensitive to dilute proteins/peptides and microenvironmental properties yet susceptible to magnetic field inhomogeneity. We aimed to develop a high‐resolution field map‐based CEST intravoxel inhomogeneity correction (CIVIC) algorithm for CEST
Sun PZ.
europepmc +2 more sources
NeRF-VINS: A Real-time Neural Radiance Field Map-based Visual-Inertial Navigation System [PDF]
IEEE International Conference on Robotics and Automation, 2023 Achieving efficient and consistent localization with a prior map remains challenging in robotics. Conventional keyframe-based approaches often suffer from sub-optimal viewpoints due to limited field of view (FOV) and/or constrained motion, thus degrading
Saimouli Katragadda +7 more
semanticscholar +1 more source
Template-based field map prediction for rapid whole brain B0 shimming. [PDF]
Magn Reson Med, 2018 In typical MRI protocols, time is spent acquiring a field map to calculate the shim settings for best image quality. We propose a fast template‐based field map prediction method that yields near‐optimal shims without measuring the field.
Shi Y, Vannesjo SJ, Miller KL, Clare S.
europepmc +2 more sources
Evaluation of Field Map and Nonlinear Registration Methods for Correction of Susceptibility Artifacts in Diffusion MRI. [PDF]
Front Neuroinform, 2017 Correction of echo planar imaging (EPI)-induced distortions (called “unwarping”) improves anatomical fidelity for diffusion magnetic resonance imaging (MRI) and functional imaging investigations. Commonly used unwarping methods require the acquisition of
Wang S +5 more
europepmc +2 more sources