2011
DOI: 10.2463/mrms.10.59
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Multi-tensor Tractography of the Motor Pathway at 3T: A Volunteer Study

Abstract: Conventional single-tensor tractography cannot depict the entire motor tract of the corticospinal tract because ofˆber-crossing and other factors. Using a 3-tesla magnetic resonance (MR) unit, we compared single-and multi-tensor methods for the tract ratio of the 5 major components of the motor pathway, the lower extremity, trunk, hand, face, and tongue, in 5 healthy volunteers. Multi-tensor tractography is better than single-tensor tractography at 3T in depicting moreˆbers of non-trunk areas from the primary … Show more

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Cited by 7 publications
(12 citation statements)
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“…Akter et al 17 used multitensor tractography to detect face and tongue motor pathways in 5 healthy adults, but their techniques required complicated data processing and a longer postprocessing time compared with the usual single tensor tractography. A multitensor tractography study with high-angular-resolution diffusion imaging by Yamada et al 18 depicted face and tongue motor pathways; however, the CBT tracts of the face were identified in only 70% of their patients.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Akter et al 17 used multitensor tractography to detect face and tongue motor pathways in 5 healthy adults, but their techniques required complicated data processing and a longer postprocessing time compared with the usual single tensor tractography. A multitensor tractography study with high-angular-resolution diffusion imaging by Yamada et al 18 depicted face and tongue motor pathways; however, the CBT tracts of the face were identified in only 70% of their patients.…”
Section: Discussionmentioning
confidence: 99%
“…Studies based on single tensor deterministic tractography have failed to identify the CBT fibers associated with the face and tongue. 12,1518 There have been a few, relatively sophisticated, high-angular-resolution diffusion imaging– based multitensor techniques with some success in extracting fibers from wider areas of the primary motor cortex, including the face and tongue areas 15,17,18 ; however, high-angular-resolution diffusion imaging– based techniques have not been applied to large cohorts of patients with brain tumors. Multitensor techniques also require long acquisition times, which are a limiting factor in patients with brain tumors and neurologic deficits.…”
mentioning
confidence: 99%
“…Thus, although our focus was not on these anatomically transitional structures per se, and despite the fact that the single-tensor approach appeared to outline these structures relatively well, future studies should utilize more advanced strategies to investigate these regions. For instance, multitensor tractography models are better at delineating fine-grained anatomical details and in imaging structures with heavy crossing fibers [52,53]. …”
Section: Discussionmentioning
confidence: 99%
“…Recent studies have used DW-MRI techniques to map the course of the adult corticobulbar tract (Akter et al 2011;Pan et al 2012;Yim et al 2013), the direct motor pathways controlling the cranial nerves responsible for articulation. However, none of these studies examined the hemispheric asymmetry of diffusion metrics.…”
Section: Introductionmentioning
confidence: 99%
“…However, none of these studies examined the hemispheric asymmetry of diffusion metrics. Furthermore, anatomical landmarks were used to delineate the seed regions necessary for reconstruction of the CBT, typically the ''hand knob'' area (Akter et al 2011). This reliance on anatomical landmarks can be problematic as representations of the articulators have been reported to overlap (see Takai et al 2010 for a review) and may differ in their precise anatomical locations between individuals.…”
Section: Introductionmentioning
confidence: 99%