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Reference: Mollink, J, van Baarsen, KM, Dederen, PJ et al., (2015). Dentatorubrothalamic tract localization with postmortem MR diffusion tractography compared to histological 3D reconstruction. Brain structure and function.Citable link to this page:

 

Dentatorubrothalamic tract localization with postmortem MR diffusion tractography compared to histological 3D reconstruction.

Abstract: Diffusion-weighted imaging (DWI) tractography is a technique with great potential to characterize the in vivo anatomical position and integrity of white matter tracts. Tractography, however, remains an estimation of white matter tracts, and false-positive and false-negative rates are not available. The goal of the present study was to compare postmortem tractography of the dentatorubrothalamic tract (DRTT) by its 3D histological reconstruction, to estimate the reliability of the tractography algorithm in this specific tract. Recent studies have shown that the cerebellum is involved in cognitive, language and emotional functions besides its role in motor control. However, the exact working mechanism of the cerebellum is still to be elucidated. As the DRTT is the main output tract it is of special interest for the neuroscience and clinical community. A postmortem human brain specimen was scanned on a 7T MRI scanner using a diffusion-weighted steady-state free precession sequence. Tractography was performed with PROBTRACKX. The specimen was subsequently serially sectioned and stained for myelin using a modified Heidenhain-Woelke staining. Image registration permitted the 3D reconstruction of the histological sections and comparison with MRI. The spatial concordance between the two modalities was evaluated using ROC analysis and a similarity index (SI). ROC curves showed a high sensitivity and specificity in general. Highest measures were observed in the superior cerebellar peduncle with an SI of 0.72. Less overlap was found in the decussation of the DRTT at the level of the mesencephalon. The study demonstrates high spatial accuracy of postmortem probabilistic tractography of the DRTT when compared to a 3D histological reconstruction. This gives hopeful prospect for studying structure-function correlations in patients with cerebellar disorders using tractography of the DRTT.

Peer Review status:Peer reviewedPublication status:PublishedVersion:Publisher's versionNotes:© The Author(s) 2015. This article is published with open access at Springerlink.com. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License. This is the publisher's version of the article. The final version is available online from Springer-Verlag at: [10.1007/s00429-015-1115-7]

Bibliographic Details

Publisher: Springer-Verlag

Publisher Website: http://link.springer.com/

Journal: Brain structure and functionsee more from them

Publication Website: http://link.springer.com/journal/429

Issue Date: 2015-10-05Identifiers

Urn: uuid:28d8c1f3-00c2-48e5-a610-8ccb8e360a12

Source identifier: 572243

Eissn: 1863-2661

Doi: https://doi.org/10.1007/s00429-015-1115-7

Issn: 1863-2653 Item Description

Type: Journal article;

Language: eng

Version: Publisher's versionKeywords: Cerebellum Dentatorubrothalamic tract Diffusion-weighted imaging Histological reconstruction Postmortem Tractography Tiny URL: pubs:572243

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Author: Mollink, J - institutionUniversity of Oxford Oxford, MSD, Clinical Neurosciences - - - van Baarsen, KM - - - Dederen, PJ - - - Fo

Source: https://ora.ox.ac.uk/objects/uuid:28d8c1f3-00c2-48e5-a610-8ccb8e360a12



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