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Tract Orientation and Angular Dispersion Deviation Indicator (TOADDI): A framework for single-subject analysis in diffusion tensor imaging

Cheng Guan Koay, Ping-Hong Yeh, John M. Ollinger, M. Okan İrfanoğlu, Carlo Pierpaoli, Peter J. Basser, Terrence R. Oakes, Gerard Riedy
2016 NeuroImage  
The purpose of this work is to develop a framework for single-subject analysis of diffusion tensor imaging (DTI) data.  ...  This work develops two complementary statistical tests based on the elliptical cone of uncertainty (COU), which is a model of uncertainty or dispersion of the major eigenvector of the diffusion tensor.  ...  Novel FDR-FNR-based Orientation and Nonparametric Shape Deviation Results The FDR and FNR values were set at 1.0x10 -10 to ensure the effect size is large, i.e., the interpolation during image registration  ... 
doi:10.1016/j.neuroimage.2015.11.046 pmid:26638985 pmcid:PMC4733630 fatcat:f4hme2ckhne2flbe2pgtnmipgm

On the averaging of cardiac diffusion tensor MRI data: the effect of distance function selection

Archontis Giannakidis, Gerd Melkus, Guang Yang, Grant T Gullberg
2016 Physics in Medicine and Biology  
Hence, we came to the conclusion that the tensor manifold for cardiac DT-MRI studies is a curved space of almost zero curvature.  ...  We employed temporal averaging at the diffusion tensor level of three consecutive and identically-acquired DT-MRI datasets from each of five rat hearts as a means to rectify the background noise-induced  ...  Acknowledgments The authors would like to thank Prof. Thomas  ... 
doi:10.1088/0031-9155/61/21/7765 pmid:27754986 pmcid:PMC5094190 fatcat:nlnngwfc4rao7k6euoykcsma34

Ex vivo 3D diffusion tensor imaging and quantification of cardiac laminar structure

Patrick A. Helm, Hsiang-Jer Tseng, Laurent Younes, Elliot R. McVeigh, Raimond L. Winslow
2005 Magnetic Resonance in Medicine  
of the diffusion tensor (DT) defines the sheet normal.  ...  The method was applied to the ex vivo reconstruction of the fiber architecture of seven canine hearts.  ...  By comparing the principle eigenvector of the DT at each image voxel with the fiber orientation measured histologically, one can see that the principle direction of water diffusion in cardiac tissue is  ... 
doi:10.1002/mrm.20622 pmid:16149057 pmcid:PMC2396270 fatcat:7pzjkaw5y5hyjjasafefdo52um

A non-rigid registration approach for quantifying myocardial contraction in tagged MRI using generalized information measures

Nicolas Rougon, Caroline Petitjean, Françoise Prêteux, Philippe Cluzel, Philippe Grenier
2005 Medical Image Analysis  
Beyond cardiac MRI, this work redefines the foundations of variational non-rigid registration for information-theoretic similarity criteria with potential interest in multimodal medical imaging.  ...  Abstract We address the problem of quantitatively assessing myocardial function from tagged MRI sequences.  ...  It is, therefore, applicable to model-free (Petitjean et al., 2003a) as well as compact model-based motion estimation using a dedicated statistical cardiac motion atlas (Petitjean et al., 2004) .  ... 
doi:10.1016/ pmid:15948657 fatcat:3m4bvm5epvhabkr4wiky3hk6oa

Glyph-based Visualization: Foundations, Design Guidelines, Techniques and Applications [article]

Rita Borgo, Johannes Kehrer, David H. S. Chung, Eamonn Maguire, Robert S. Laramee, Helwig Hauser, Matthew Ward, Min Chen
2012 Eurographics State of the Art Reports  
and implementation techniques, and surveying the use of glyph-based visualization in many applications.  ...  This state of the art report focuses on glyph-based visualization, a common form of visual design where a data set is depicted by a collection of visual objects referred to as glyphs.  ...  A subset of the family of superquadrics is chosen and applied towards visualizing a DT-MRI tensor field which is then compared against an equivalent ellipsoid visualization. Kriz et al.  ... 
doi:10.2312/conf/eg2013/stars/039-063 fatcat:72lte7n3crb5ncclsde3bb4jsq

Wavelets in Temporal and Spatial Processing of Biomedical Images

Andrew F. Laine
2000 Annual Review of Biomedical Engineering  
We review some of the most recent advances in the area of wavelet applications in medical imaging.  ...  Next, wavelets in tomography are reviewed, including their relationship to the radon transform and applications in position emission tomography imaging.  ...  Obviously in a dyadic framework, interpolation across scale is required for tracking, and there is a lack of mathematics to support the validity of segmentation methods.  ... 
doi:10.1146/annurev.bioeng.2.1.511 pmid:11701522 fatcat:zyudqts6ave2lirghksik5i3ie

Anatomical Model of Rat Ventricles to Study Cardiac Arrhythmias under Infarction Injury

Roman Rokeakh, Tatiana Nesterova, Konstantin Ushenin, Ekaterina Polyakova, Dmitry Sonin, Michael Galagudza, Tim De Coster, Alexander Panfilov, Olga Solovyova
2021 Mathematics  
Species-specific computer models of the heart are a novel powerful tool in studies of life-threatening cardiac arrhythmias.  ...  Then, using an anatomically realistic ventricular geometry and fiber orientation in the rat heart, we built a model with a post-infarction scar to study the electrophysiological effects of myocardial damage  ...  The fiber orientation was interpolated within the refined ventricular geometry using nearest neighbor interpolation. The diffusion tensor D was defined according to this fiber orientation.  ... 
doi:10.3390/math9202604 fatcat:mq2sn3kcvjbupa4qr5fc5yhjue

Three-dimensional solid texture analysis in biomedical imaging: Review and opportunities

Adrien Depeursinge, Antonio Foncubierta-Rodriguez, Dimitri Van De Ville, Henning Müller
2014 Medical Image Analysis  
Future research directions and opportunities are proposed to efficiently model personalized image-based phenotypes of normal biomedical tissue and its alterations.  ...  In this text we exhaustively analyze the state-of-the-art in 3-D biomedical texture analysis to identify the specific needs of the application domains and extract promising trends in image processing algorithms  ...  Acknowledgments This work was supported by the Swiss National Science Foundation (under Grants 205320-141300/1, PBGEP2_142283 and PP00P2-146318), the CIBM, and the EU 7th Framework Program in the context of  ... 
doi:10.1016/ pmid:24231667 fatcat:6luivlhrtrdv5dlbh626ohkps4

A combined local and global motion estimation and compensation method for cardiac CT

Qiulin Tang, Beshan Chiang, Akinola Akinyemi, Alexander Zamyatin, Bibo Shi, Satoru Nakanishi, Bruce R. Whiting, Christoph Hoeschen
2014 Medical Imaging 2014: Physics of Medical Imaging  
In this paper, we present a method to extract the centerline of the aorta in PC-MR images by applying methods from the DT-MRI.  ...  cine MRI requires the segmentation of cardiac structures in the images, but the problem of automatic cardiac segmentation is still open, due to the imaging characteristics of cardiac MR images and the  ...  construct automated systems to compliment histopathological evaluation of biomedical tissue samples.  ... 
doi:10.1117/12.2043492 fatcat:fyzpc5m6jbh7fjohqpdmtzkhte

A Review of Wavelet Analysis and Its Applications: Challenges and Opportunities

Tiantian Guo, Tongpo Zhang, Enggee Lim, Miguel Lopez-Benitez, Fei Ma, Limin Yu
2022 IEEE Access  
This article also introduces the categories of wavelet-based applications. The advantages of wavelet analysis are summarized in terms of application scenarios with a comparison of results.  ...  Through the review, new research challenges and gaps have been clarified, which will serve as a guide for potential wavelet-based applications and new system designs.  ...  In practical applications, the two-dimensional and high-dimensional wavelet bases currently used are separable; the lowdimensional wavelet base is constructed as a tensor product.  ... 
doi:10.1109/access.2022.3179517 fatcat:esfc4umo4vgzlbqa7lfxsl7e4m

A multiresolution space-time adaptive scheme for the bidomain model in electrocardiology

Mostafa Bendahmane, Raimund Bürger, Ricardo Ruiz-Baier
2009 Numerical Methods for Partial Differential Equations  
purpose is to concentrate computational effort on zones of strong variation of the solution.  ...  In the simpler subcase of the monodomain model, the elliptic PDE reduces to an algebraic equation.  ...  Clearly, cardiac simulations should be based on space-(and also time-) adaptive methods.  ... 
doi:10.1002/num.20495 fatcat:otvic54cd5fudmj7wwp4ryl5v4

Multi-Resolution and Wavelet Representations for Identifying Signatures of Disease

Paul Sajda, Andrew Laine, Yehoshua Zeevi
2002 Disease Markers  
We present several examples where these transforms are applied to biomedical signal and imaging processing.  ...  analysis of the electroencephalogram, and reconstruction of positron emission tomography data.  ...  of Naval Research under N00014-01-0625 (P.S and Y.Z), the Department of Biomedical Engineering Imaging Group of Columbia University, the Ollendorff Center of the Technion and the Israeli Ministry of Science  ... 
doi:10.1155/2002/108741 pmid:14646044 pmcid:PMC3851637 fatcat:3igejnra3res3k7m3vhb3sklii

Scalable Biophysical Simulations of the Neuromuscular System [article]

Benjamin Maier
2021 arXiv   pre-print
The numerical solution of such multi-scale models imposes high computational work loads, which restricts their application to short simulation time spans or coarse resolutions.  ...  enables us to simulate muscular surface EMG of the biceps brachii muscle with realistic muscle fiber counts of several hundred thousands.  ...  Another application-oriented work dedicated to the use of commercial tools is [Ram18] .  ... 
arXiv:2107.07104v1 fatcat:i5simmhifbgjdpcsm6l73vc3pe

Computational Fluid-Particle Dynamics Modeling for Unconventional Inhaled Aerosols in Human Respiratory Systems [chapter]

Yu Feng, Zelin Xu, Ahmadreza Haghnegahdar
2016 Aerosols - Science and Case Studies  
(LBM), and/or physiologically based pharmacokinetic (PBPK) models.  ...  The ultimate goal is to establish a roadmap to link different numerical models, and to build the framework of a new multiscale numerical model, which will extend exposure and lung deposition predictions  ...  Also, Brownian motion of particles arises spontaneously from stochastic fluctuations in the fluid stress tensor, avoiding application of a random force on particles.  ... 
doi:10.5772/65361 fatcat:su2tpzr4x5e6zbcooxcsb742qy

SU-FF-I-79: Java-Based Plugin for Tomographic Reconstruction for SPECT Data

M Andrade, M Costa, A Marques da Silva
2006 Medical Physics (Lancaster)  
True alignment of planning and on-board image data was achieved according to a 3D point-based registration of the 6 reference BBs in the CT and CBCT images.  ...  This study examines the accuracy of 3D-3D registration of reference and on-board DTS images to assess the potential of DTS for image-guided radiation therapy (IGRT).  ...  SU-FF-I-58 Demonstration of the Use of A Capillary Phantom to Monitor DTI Image Processing: Dyadic Sorting of Tensor Eigenvalues N Yanasak*, J Allison, Medical College of Georgia, Augusta, GA Purpose:  ... 
doi:10.1118/1.2240759 fatcat:5we2nvgwx5hrxcv2ngufce6obq
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