Diffusion Weighted MRI Category

Simulations of free diffusion. Error between theoretical and simulated diffusion probability-density functions was minimized with 5–10 time-steps when the number of spins × the number of time-steps was held constant. Curves show mean error ± standard error for three diffusion times.

Complex Geometric Models of Diffusion and Relaxation in Healthy and Damaged White Matter

Jan. 31, 2010—. B. A. Landman, J. A.D. Farrell, S. A. Smith, D. Reich, P. Calabresi, and P. C.M. van Zijl, “Complex Geometric Models of Diffusion and Relaxation in Healthy and Damaged White Matter”, NMR in Biomed, Volume 23 Issue 2, Pages 152 – 162. (2010). PMC2838925 † Full text: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2838925/ Abstract Which aspects of tissue microstructure...

Interpolation of the genu of the Corpus Callosum (CC) and longitudinal fasciculus
(LF) near the lateral ventricle (V): region of interest (ROI) selected on an
orientation color coded anisotropy map (A,B). MD (C) and log-determinant (D) are
shown at the reconstructed resolution. Upsampled (4 × 4) and interpolated contrasts
are shown for linear (E-G), Log-Euclidean (H-J), and CLEAR (K-M) tensor interpolation.
While the linear interpolation has smooth FA and MD (E,F), it exhibits abrupt
changes in the determinant (G). The Log-Euclidean interpolation exhibits FA artifacts
in regions of high anisotropy and curvature (H). CLEAR avoids all these problems

Tensor Interpolation by Concise Local Estimation of Anisotropy and Rotation

Sep. 1, 2008—A. Landman, P-L. Bazin, and J. L. Prince. “Tensor Interpolation by Concise Local Estimation of Anisotropy and Rotation”, In Proceedings of the Workshop on Computational Diffusion MRI at the 11th International Conference on Medical Image Computing and Computer Assisted Intervention, New York, NY, September 2008. Full Text:http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.701.4262&rep=rep1&type=pdf#page=265 Abstract In diffusion tensor imaging, tensors represent the...

CFARI identified consistent intra-voxel structure in the crossing fibers between
the corpus callosum (CC, lower left, red) and internal capsule (IC, blue, lower right).
Conventional tensor modeling does not preserve the connectivity of the corpus callosum
to the lateral hemispheres

Compressed Sensing of Multiple Intra-Voxel Orientations with Traditional DTI

Sep. 1, 2008—A. Landman, J. Bogovic, and J. L. Prince. “Compressed Sensing of Multiple Intra-Voxel Orientations with Traditional DTI”, In Proceedings of the Workshop on Computational Diffusion MRI at the 11th International Conference on Medical Image Computing and Computer Assisted Intervention, New York, NY, September 2008. Full Text:http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.701.4262&rep=rep1&type=pdf#page=183 Abstract Diffusion tensor imaging (DTI) is widely used to...

Slices at the level of C4 are shown for a control (left) and a MS patient with a LC lesion (center). Mean PDF's within the indicated regions are presented at right.

Robust Maximum Likelihood Estimation in Q-space MRI

May. 1, 2008—A. Landman, J. A.D. Farrell, S. A. Smith, P. A. Calabresi, P. C.M. van Zijl, and J. L. Prince. “Robust Maximum Likelihood Estimation in Q-space MRI”, In Proceedings of the 2008 IEEE International Symposium on Biomedical Imaging, Paris, France, May 2008 PMC2872926 Full Text:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2872926/ Abstract Q-space imaging is an emerging diffusion weighted MR imaging technique...