NDLI: Identification of the Corticobulbar Tracts of the Tongue and Face Using Deterministic and Probabilistic DTI Fiber Tracking in Patients with Brain Tumor.

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Identification of the Corticobulbar Tracts of the Tongue and Face Using Deterministic and Probabilistic DTI Fiber Tracking in Patients with Brain Tumor.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Jenabi, M. Peck, K. K. Young, R. J. Brennan, N. Holodny, A. I.
Description	Author Affiliation: Jenabi M ( From the Departments of Radiology (M.J., K.K.P., R.J.Y., N.B., A.I.H.).); Peck KK ( From the Departments of Radiology (M.J., K.K.P., R.J.Y., N.B., A.I.H.) Medical Physics (K.K.P.).); Young RJ ( From the Departments of Radiology (M.J., K.K.P., R.J.Y., N.B., A.I.H.) Brain Tumor Center (R.J.Y., A.I.H.), Memorial Sloan-Kettering Cancer Center, New York, New York Department of Radiology (R.J.Y., A.I.H.), Weill Medical College of Cornell University, New York, New York.); Brennan N ( From the Departments of Radiology (M.J., K.K.P., R.J.Y., N.B., A.I.H.).); Holodny AI ( From the Departments of Radiology (M.J., K.K.P., R.J.Y., N.B., A.I.H.) Brain Tumor Center (R.J.Y., A.I.H.), Memorial Sloan-Kettering Cancer Center, New York, New York Department of Radiology (R.J.Y., A.I.H.), Weill Medical College of Cornell University, New York, New York. holodnya@mskcc.org.)
Abstract	BACKGROUND AND PURPOSE: The corticobulbar tract of the face and tongue, a critical white matter tract connecting the primary motor cortex and the pons, is rarely detected by deterministic DTI fiber tractography. Detection becomes even more difficult in the presence of a tumor. The purpose of this study was to compare identification of the corticobulbar tract by using deterministic and probabilistic tractography in patients with brain tumor. MATERIALS AND METHODS: Fifty patients with brain tumor who underwent DTI were studied. Deterministic tractography was performed by using the fiber assignment by continuous tractography algorithm. Probabilistic tractography was performed by using a Monte Carlo simulation method. ROIs were drawn of the face and tongue motor homunculi and the pons in both hemispheres. RESULTS: In all subjects, fiber assignment by continuous tractography was ineffectual in visualizing the entire course of the corticobulbar tract between the face and tongue motor cortices and the pons on either side. However, probabilistic tractography successfully visualized the corticobulbar tract from the face and tongue motor cortices in all patients on both sides. No significant difference (P < .08) was found between both sides in terms of the number of voxels or degree of connectivity. The fractional anisotropy of both the face and tongue was significantly lower on the tumor side (P < .03). When stratified by tumor type, primary-versus-metastatic tumors, no differences were observed between tracts in terms of the fractional anisotropy and connectivity values (P > .5). CONCLUSIONS: Probabilistic tractography successfully reconstructs the face- and tongue-associated corticobulbar tracts from the lateral primary motor cortex to the pons in both hemispheres.
File Format	HTM / HTML
ISSN	01956108
e-ISSN	1936959X
Journal	American Journal of Neuroradiology
Issue Number	11
Volume Number	36
Language	English
Publisher	American Journal of Neuroradiology
Publisher Date	2015-11-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Discipline Neurology Discipline Radiology Brain Neoplasms Pathology Diffusion Tensor Imaging Pyramidal Tracts Tongue Algorithms Anisotropy Image Processing, Computer-assisted
Content Type	Text
Resource Type	Article
Subject	Radiology, Nuclear Medicine and Imaging Neurology (clinical)

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Identification of the Corticobulbar Tracts of the Tongue and Face Using Deterministic and Probabilistic DTI Fiber Tracking in Patients with Brain Tumor.