A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2021; you can also visit the original URL.
The file type is application/pdf.
Filters
Physics-based Reconstruction Methods for Magnetic Resonance Imaging
[article]
2021
arXiv
pre-print
Preserved Fulltext
Other Versions
Conventional Magnetic Resonance Imaging (MRI) is hampered by long scan times and only qualitative image contrasts that prohibit a direct comparison between different systems. ...
To address these limitations, model-based reconstructions explicitly model the physical laws that govern the MRI signal generation. ...
Tobias Block for the radial spin-echo sequence, and Dr. Christian Holme for help with the scripts. ...
arXiv:2010.01403v3
fatcat:dwd2abbjgvhpvh4c63lmmyaouy
A new fast magnetic resonance imaging method based on variabledensity spiral data acquisition and Bregman iterative reconstruction
2013
Wuli xuebao
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2022; you can also visit the original URL.
The file type is application/pdf.
Data acquisition time is a bottle neck for increasing imaging speed of magnetic resonance imaging. ...
To solve the problem, a new fast magnetic resonance imaging method based on variable-density spiral acquisition and Bregman iterative reconstruction is proposed in this paper, under the framework of compressed ...
resonance imaging method based on variabledensity spiral data acquisition and Bregman iterative reconstruction * ∂ J(∇ρ k ) − q k−1 + E H (Eρ k − s) = 0, ( 14 ) ∂ J(∇ρ k ) = q k−1 − E H (Eρ k − s), ( ...
doi:10.7498/aps.62.048702
fatcat:goniq3fvcfftvikdo3djemyx7e
Computational MRI: Compressive Sensing and Beyond [From the Guest Editors]
2020
IEEE Signal Processing Magazine
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
Model-based reconstruction in MRI using fixed transforms The first article, "Mathematical Models for Mag netic Resonance Imaging Reconstruction," by Doneva, is an overview of MRI acquisition schemes from ...
Most of the current medical-imaging modalities [e.g., magnetic resonance imaging (MRI), CT, positron emission tomography] employ computational imaging in one form or another. ...
Namrata Vaswani, Clem Karl, SPM's Editor-in-Chief Robert Heath, and SPM's entire editorial board for their helpful feedback and suggestions for the content of this special issue. ...
doi:10.1109/msp.2019.2953993
pmid:33623355
pmcid:PMC7899158
fatcat:kqogwy52r5grbezsfjp2mzxs6e
Magnetic resonance imaging based correction and reconstruction of positron emission tomography images (in English)
2000
Medical Physics (Lancaster)
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL.
The file type is application/pdf.
Magnetic resonance imaging ͑MRI͒ data provides significant information about the expected distribution of radioactivity in the brain. ...
This thesis presents new methods for dealing with the projection data on an anisotropic basis. This is done in order to compromise the need for regularization and the drive toward better resolutions. ...
Magnetic resonance imaging based correction and reconstruction of positron emission tomography images "in Reconstruction of positron emission tomography ͑PET͒ images with good quantitative and qualitative ...
doi:10.1118/1.1287650
fatcat:3kzhcwxvwvg25jf33febgrd7nm
Investigation of Cell Ratio Objects by Magnetic Resonance Imaging (MRI)
2013
Journal of Materials Science and Engineering: B
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
The pseudo-inversion matrix method is used for spatial density reconstruction of investigated object. ...
The physical model of cell ratio object is used for calculation of additional magnetic fields caused by the interaction of magnatic moments. ...
A novel, fast entropy-minimization algorithm for bias field correction in magnetic resonance (MR) images is suggested to correct the intensity inhomogeneity degradation of MR images that has become an ...
doi:10.17265/2161-6221/2013.09.006
fatcat:3cpo7ozp6rhkldbo6sgq6ye2ym
Magnetic resonance image reconstruction using analytic image representation
2007
Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
Partial k-space acquisition is a subject of great interest in magnetic resonance imaging (MRI). ...
We propose a novel approach for reconstructing MR images from partial k-space. ...
ARTICLE IN PRESS
Conclusion We have proposed a magnetic resonance image reconstruction method based on the notion of analytic image. ...
doi:10.1016/j.nima.2006.10.032
fatcat:73mvav2sobf3xjb5gdv6nflcwy
Multifrequency inversion in magnetic resonance elastography
2012
Physics in Medicine and Biology
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL.
The file type is application/pdf.
Therefore, we here propose the use of multifrequency wave data from magnetic resonance elastography (MRE) for solving the inverse problem of viscoelasticity reconstruction by an algebraic least-squares ...
However, finite tissue boundaries and waveguide effects give rise to wave interferences which are not accounted for by standard elasticity reconstruction methods. ...
Therefore, we here propose the use of multifrequency wave data from magnetic resonance elastography (MRE) for solving the inverse problem of viscoelasticity reconstruction by an algebraic least-squares ...
doi:10.1088/0031-9155/57/8/2329
pmid:22460134
fatcat:4pz6ia5iingttlkjtbkyddjbry
Breast Volume Measurement by Recycling the Data Obtained From 2 Routine Modalities, Mammography and Magnetic Resonance Imaging
2017
ePlasty: Open Access Journal of Plastic and Reconstructive Surgery
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
The correlation coefficients with mastectomy specimen volumes were 0.982 for magnetic resonance imaging and 0.911 for mammography. ...
These results indicate that mammography could be an alternative modality for breast volume measurement as a substitute for magnetic resonance imaging. ...
The correlation coefficients with mastectomy specimen volumes were 0.982 for magnetic resonance imaging and 0.911 for mammography. ...
pmid:29308107
pmcid:PMC5741562
fatcat:sjmtzsyszjeh5p6sj7ufwvfdvm
Compressed sensing in MRI – mathematical preliminaries and basic examples
2016
Nukleonika
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL.
The file type is application/pdf.
In magnetic resonance imaging (MRI), k-space sampling, due to physical restrictions, is very time-consuming. It cannot be much improved using classical Nyquist-based sampling theory. ...
We describe the main conditions for measurement matrices and recovery algorithms and present a basic example, showing that while the method really works (reducing the time of MR examination), there are ...
In magnetic resonance imaging (MRI), k-space sampling, due to physical restrictions, is very time--consuming. It cannot be much improved using classical Nyquist-based sampling theory. ...
doi:10.1515/nuka-2016-0003
fatcat:luoygbn6brho7mysanyts5t6pm
Accelerated three-dimensional free-breathing first pass cardiac perfusion at 1.5T
2013
Journal of Cardiovascular Magnetic Resonance
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL.
The file type is application/pdf.
However, such highly accelerated k-t based techniques used for 3D perfusion [3] require breath-hold acquisitions, which may be difficult following physical stress or for some patients. ...
Methods 9 patients (46.0±14.8 years; 6 males) underwent 3D perfusion CMR on a 1.5T Philips Achieva magnet. ...
doi:10.1186/1532-429x-15-s1-p42
fatcat:ym3xwa32ejfo7mtqbym5uwjhzu
Multi-modality image reconstruction for dual-head small-animal PET
2015
EJNMMI Physics
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
The hybrid positron emission tomography/computed tomography (PET/CT) or positron emission tomography/magnetic resonance imaging (PET/MRI) has become routine practice in clinics. ...
Our simulations studies validated that the images reconstructed by use of the proposed method can outperform those obtained by use of conventional expectation maximization algorithms or that without considering ...
National Taiwan University, Taipei, Taiwan The hybrid positron emission tomography/computed tomography (PET/CT) or positron emission tomography/magnetic resonance imaging (PET/MRI) has become routine practice ...
doi:10.1186/2197-7364-2-s1-a35
pmid:26956292
pmcid:PMC4798626
fatcat:j3dmyobyuzcexdhz4fykmuin2u
Divergence-free reconstruction for accelerated 3D phase-contrast flow measurements
2012
Journal of Cardiovascular Magnetic Resonance
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
Background Cine 3D phase-contrast magnetic resonance imaging (PC-MRI) has emerged as a valuable tool for assessing blood flow patterns [Markl, JCMR'11] . ...
Summary In this work an approach is described to efficiently reduce inaccuracies of flow data acquired with reduced data acquisition methods based on the physical prior knowledge of zero divergence in ...
Submit your next manuscript to BioMed Central and take full advantage of:
• Research which is freely available for redistribution Submit your manuscript at www.biomedcentral.com/submit ...
doi:10.1186/1532-429x-14-s1-w38
pmcid:PMC3305738
fatcat:4tdh6fn6incnlewt3rmgcag4bu
Reliability of using a fixed matrix in coregistration of combined PET–MRI in a split magnet design
2013
Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
We consider the effects of using a fixed linear transformation to match positron emission tomography (PET) and magnetic resonance imaging (MRI) data acquired simultaneously using a split-magnet system. ...
Estimates of the frequency offset in MRI scans were used to calculate geometric variability in MRI reconstruction as a consequence of mis-setting this parameter in addition to repeated estimation of the ...
Introduction Magnetic resonance imaging (MRI) provides excellent soft-tissue contrast in in vivo imaging at a high spatial resolution. ...
doi:10.1016/j.nima.2012.07.060
pmid:25729118
pmcid:PMC4340551
fatcat:goygnxaskjhohmg3pmkmw5s2be
Fast conjugate phase image reconstruction based on a Chebyshev approximation to correct for B0 field inhomogeneity and concomitant gradients
2008
Magnetic Resonance in Medicine
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
Off-resonance effects can cause image blurring or artifacts in a number of fast imaging methods. ...
In this abstract, we present a fast CPR method based on a Chebyshev approximation for simultaneous B0 inhomogeneity and concomitant gradient field correction. ...
Fast conjugate phase image reconstruction based on a Chebyshev approximation to correct for B0 field inhomogeneity and concomitant gradients W. Chen 1 , C. T. Sica 1,2 , and C. H. ...
doi:10.1002/mrm.21703
pmid:18956462
pmcid:PMC3236685
fatcat:iuge76uibngklo2hc2drun6ryq
Body coil reference for inverse reconstructions of multi-coil data—the case for real-time MRI
2019
Quantitative Imaging in Medicine and Surgery
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
Real-time magnetic resonance imaging (MRI) or model-based MRI reconstructions of parametric maps require the solution of an ill-posed nonlinear inverse problem. ...
The method is evaluated for anatomical real-time MRI and model-based phase-contrast flow MRI in real-time at 3 T. ...
The method is simple, easy to Table 1 . MRI, magnetic resonance imaging. Table 1 . MRI, magnetic resonance imaging. ...
doi:10.21037/qims.2019.08.14
pmid:31867235
pmcid:PMC6902137
fatcat:bodd7rtc45h4xcr64zoe5wqs3q
« Previous
Showing results 1 — 15 out of 67,269 results