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Brain Fiber Tracking with Clinically Feasible Diffusion-Tensor MR Imaging: Initial Experience¹

¹ From the Departments of Radiology (K.Y., O.K., H.I., H.N., S.Y., T.K., O.T., W.A., T.N.) and Neurosurgery (H.S., K.M.), Kyoto Prefectural University of Medicine, Kajii-cyo, Kawaramachi Hirokoji Sagaru, Kamigyo-ku, Kyoto City, Kyoto 602-8566, Japan; and Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, Md (S.M.). Received April 1, 2002; revision requested June 13; revision received June 20; accepted August 8. Address correspondence to K.Y. (e-mail: kyamada@koto.kpu-m.ac.jp).

Two technical challenges must be overcome before brain fiber tracking with diffusion-tensor magnetic resonance (MR) imaging can be applied to clinical practice: Imaging time must be shortened, and image distortion must be minimized. Single-shot echo-planar MR imaging with parallel imaging technique enabled both objectives to be accomplished. Twenty-three consecutive patients with brain tumors underwent MR imaging with a 1.5-T whole-body MR system. Fiber tracts on the lesion side in the brain had varying degrees of displacement or disruption as a result of the tumor. Tract disruption resulted from direct tumor involvement, compression on the tract, and vasogenic edema surrounding the tumor. This diffusion-tensor MR imaging method with the parallel imaging technique allows clinically feasible brain fiber tracking.

© RSNA, 2003

Index terms: Brainstem, MR, 15.121416 • Brainstem, neoplasms, 15.30 • Diffusion tensor, 15.121416 • Magnetic resonance (MR), diffusion tensor, 15.121416

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