• Masaaki Hori, Satoshi Tsutsumi, Yukimasa Yasumoto, Masanori Ito, Michimasa Suzuki, Fumine S Tanaka, Shinsuke Kyogoku, Masanobu Nakamura, Takashi Tabuchi, Issei Fukunaga, Yuriko Suzuki, Koji Kamagata, Yoshitaka Masutani, and Shigeki Aoki.
• Department of Radiology, Juntendo University School of Medicine, Tokyo, Japan. Electronic address: mahori@juntendo.ac.jp.
• Magn Reson Imaging. 2014 Jun 1; 32 (5): 428-32.

IntroductionWe investigated microstructural changes in the spinal cord, separately for white matter and gray matter, in patients with cervical spondylosis by using diffusional kurtosis imaging (DKI).MethodsWe studied 13 consecutive patients with cervical myelopathy (15 affected sides and 11 unaffected sides). After conventional magnetic resonance (MR) imaging, DKI data were acquired by using a 3T MR imaging scanner. Values for fractional anisotropy (FA), apparent diffusion coefficient (ADC), and mean diffusional kurtosis (MK) were calculated and compared between unaffected and affected spinal cords, separately for white matter and gray matter.ResultsTract-specific analysis of white matter in the lateral funiculus showed no statistical differences between the affected and unaffected sides. In gray matter, only MK was significantly lower in the affected spinal cords than in unaffected spinal cords (0.60±0.18 vs. 0.73±0.13, P=0.0005, Wilcoxon's signed rank test).ConclusionsMK values in the spinal cord may reflect microstructural changes and gray matter damage and can potentially provide more information beyond that obtained with conventional diffusion metrics.Copyright © 2014 The Authors. Published by Elsevier Inc. All rights reserved.

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