Comparison of MRI-based automated segmentation methods and functional neurosurgery targeting with direct visualization of the Ventro-intermediate thalamic nucleus at 7T

Najdenovska, Elena, Tuleasca, Constantin, Jorge, João, Maeder, Philippe, Marques, José P., Roine, Timo, Gallichan, Daniel ORCID: https://orcid.org/0000-0002-0143-2855, Thiran, Jean-Philippe, Levivier, Marc and Bach Cuadra, Meritxell 2019. Comparison of MRI-based automated segmentation methods and functional neurosurgery targeting with direct visualization of the Ventro-intermediate thalamic nucleus at 7T. Scientific Reports 9 , 1119. 10.1038/s41598-018-37825-8

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Abstract

The ventro-intermediate nucleus (Vim), as part of the motor thalamic nuclei, is a commonly used target in functional stereotactic neurosurgery for treatment of drug-resistant tremor. As it cannot be directly visualized on routinely used magnetic resonance imaging (MRI), its clinical targeting is performed using indirect methods. Recent literature suggests that the Vim can be directly visualized on susceptibility-weighted imaging (SWI) acquired at 7 T. Our work aims to assess the distinguishable Vim on 7 T SWI in both healthy-population and patients and, using it as a reference, to compare it with: (1) The clinical targeting, (2) The automated parcellation of thalamic subparts based on 3 T diffusion MRI (dMRI), and (3) The multi-atlas segmentation techniques. In 95.2% of the data, the manual outline was adjacent to the inferior lateral border of the dMRI-based motor-nuclei group, while in 77.8% of the involved cases, its ventral part enclosed the Guiot points. Moreover, the late MRI signature in the patients was always observed in the anterior part of the manual delineation and it overlapped with the multi-atlas outline. Overall, our study provides new insight on Vim discrimination through MRI and imply novel strategies for its automated segmentation, thereby opening new perspectives for standardizing the clinical targeting

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering Cardiff University Brain Research Imaging Centre (CUBRIC)
Publisher:	Nature Publishing Group
ISSN:	2045-2322
Date of First Compliant Deposit:	7 February 2019
Date of Acceptance:	13 December 2018
Last Modified:	05 May 2023 20:57
URI:	https://orca.cardiff.ac.uk/id/eprint/119322

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