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AJNR - American Journal of Neuroradiology

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MR Diffusion Tensor Imaging and Fiber Tracking in 5 Spinal Cord Astrocytomas

D. Ducreux^a, J.-F. Lepeintre^b, P. Fillard^c, C. Loureiro^b, M. Tadié^b and P. Lasjaunias^a

^a Department of Neuroradiology, CHU de Bicêtre, Paris XI University, Le Kremlin-Bicêtre, France
^b Department of Neurosurgery, CHU de Bicêtre, Paris XI University, Le Kremlin-Bicêtre, France
^c EPIDAURE, INRIA, Sophia-Antipolis, France

View larger version (114K): [in a new window]   Fig 1. Fiber tracking performed on a volunteer’s cervical spinal cord focused on the posterior lemniscal tracts. Sagittal (A), axial (B), and coronal (C) views show tracts reconstructed over the b0 sequence. Note the decussating fibers (arrow).

View larger version (87K): [in a new window]   Fig 2. MR imaging of a spinal cord involvement due to a solid state astrocytoma. FA map and fiber tracking over b0 image show warped fibers around the tumor. Neither the vasogenic edema nor the cystic portion of the tumor was visible on the T2-weighted image, and boundaries of the lesion visible on both the FA map and 3D FT reconstructions (arrow) matched those on T2-weighted imaging.