Author

The influence of regions of interest on tractography virtual dissection protocols: general principles to learn and to follow

Jul. 26, 2022—Rheault, Francois, Kurt G. Schilling, Sami Obaid, John P. Begnoche, Laurie E. Cutting, Maxime Descoteaux, Bennett A. Landman, and Laurent Petit. “The influence of regions of interest on tractography virtual dissection protocols: general principles to learn and to follow.” Brain Structure and Function (2022): 1-17. Full Text Abstract Purpose: Efficient communication across fields of research is challenging, especially...

Mosaic of dissections of the first timepoint of the first HCP subject from 20 raters (left), all dissections look extremely similar. On the right, the average dissection (gold standard) in both the streamlines and the voxel representations. The coloring is based on the orientation of each streamline, where the X/Y/Z differences are mapped to R/G/B. To be considered part of the gold standard, elements had to be labeled in at least 50% of dissection associated with each subject. The PYT had a more consistent spatial coverage compared to the first Tractostorm project (only bundle in common)

Tractostorm 2: Optimizing tractography dissection reproducibility with segmentation protocol dissemination

Feb. 11, 2022—Rheault, Francois, Kurt G. Schilling, Alex Valcourt-Caron, Antoine Théberge, Charles Poirier, Gabrielle Grenier, Guido I. Guberman, John Begnoche, Jon Haitz Legarreta, Leon Y. Cai, Maggie Roy, Manon Edde, Marco Perez Caceres, Mario Ocampo-Pineda, Noor Al-Sharif, Philippe Karan, Pietro Bontempi, Sami Obaid, Sara Bosticardo, Simona Schiavi, Viljami Sairanen, Alessandro Daducci, Laurie E. Cutting, Laurent Petit, Maxime...

Average shape and position of all bundles that are part of the TractEM protocol (association and projection pathways are shown only for the left hemisphere). The average was computed using segmentation from 4 raters and 4 datasets (BLSA) using a majority vote. This highlights the general agreement on the shape, but as seen in the lower right vignette the variability of each individual segmentation can be quite extreme.

TractEM: Evaluation of protocols for deterministic tractography white matter atlas

Dec. 3, 2021—Rheault, Francois, Roza G. Bayrak, Xuan Wang, Kurt G. Schilling, Jasmine M. Greer, Colin B. Hansen, Cailey Kerley et al. “TractEM: Evaluation of protocols for deterministic tractography white matter atlas.” Magnetic Resonance Imaging 85 (2022): 44-56. Full Text Abstract Purpose: One of the key challenges of the manual delineation of white matter pathways is human-rater’s subjectivity in labeling....