Diffusion tensor imaging analysis of optic radiation using readout-segmented echo-planar imaging

Yamada, H., Yamamoto, A., Okada, T., Kanagaki, M., Fushimi, Y., Mehemed, T. M., Porter, D. A. and Togashi, K. (2014) Diffusion tensor imaging analysis of optic radiation using readout-segmented echo-planar imaging. Surgical and Radiologic Anatomy, 36(10), pp. 973-980. (doi: 10.1007/s00276-014-1299-1) (PMID:24771005)

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Abstract

Purpose: To investigate the diffusion tensor imaging parameters of the optic radiation and surrounding structures using the high-resolution readout-segmented diffusion tensor imaging method. Materials and methods: Coronal readout-segmented diffusion tensor images were acquired in 15 healthy volunteers. On three slices of each image, eigenvalue 1, fractional anisotropy, radial diffusivity, apparent diffusion coefficient, and signal intensity on T2-weighted images were measured in the lateral inferior longitudinal fasciculus, external and internal layers of the optic radiation, and the tapetum within regions of interest delineated by two independent observers. Profile curve analysis of regions of interest across the optic radiation and surrounding structures was performed for a representative typical case. Results: Significant differences in fractional anisotropy, radial diffusivity and apparent diffusion coefficient were observed between external and internal layers of the optic radiation, while there was no significant difference in eigenvalue 1. In fractional anisotropy maps, two low signal bands were observed between the inferior longitudinal fasciculus, the optic radiation and the tapetum. Profile curve analysis showed a minimum on the fractional anisotropy and eigenvalue 1 images and a maximum in the radial diffusivity image. Conclusion: Readout-segmented diffusion tensor imaging revealed significant differences in the diffusion tensor imaging parameters between internal and external layers of the optic radiation.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Porter, Professor David
Authors: Yamada, H., Yamamoto, A., Okada, T., Kanagaki, M., Fushimi, Y., Mehemed, T. M., Porter, D. A., and Togashi, K.
College/School:College of Medical Veterinary and Life Sciences > School of Psychology & Neuroscience
Journal Name:Surgical and Radiologic Anatomy
Publisher:Springer
ISSN:0930-1038
ISSN (Online):1279-8517
Published Online:26 April 2014

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