Effect of increasing diffusion gradient direction number on diffusion tensor imaging fiber tracking in the human brain

Korean Journal of Radiology : Official Journal of the Korean Radiological Society
Xufeng YaoSonglin Zhuang

Abstract

To assess the effects of varying the number of diffusion gradient directions (NDGDs) on diffusion tensor fiber tracking (FT) in human brain white matter using tract characteristics. Twelve normal volunteers underwent diffusion tensor imaging (DTI) scanning with NDGDs of 6, 11, 15, 21, and 31 orientations. Three fiber tract groups, including the splenium of the corpus callosum (CC), the entire CC, and the full brain tract, were reconstructed by deterministic DTI-FT. Tract architecture was first qualitatively evaluated by visual observation. Six quantitative tract characteristics, including the number of fibers (NF), average length (AL), fractional anisotropy (FA), relative anisotropy (RA), mean diffusivity (MD), and volume ratio (VR) were measured for the splenium of the CC at the tract branch level, for the entire CC at tract level, and for the full brain tract at the whole brain level. Visual results and those of NF, AL, FA, RA, MD, and VR were compared among the five different NDGDs. The DTI-FT with NDGD of 11, 15, 21, and 31 orientations gave better tracking results compared with NDGD of 6 after the visual evaluation. NF, FA, RA, MD, and VR values with NDGD of six were significantly greater (smallest p = 0.001 to largest p =...Continue Reading

Citations

Sep 4, 2015·Journal of Neuroscience Methods·Elisa KallioniemiPetro Julkunen
Mar 2, 2017·Korean Journal of Radiology : Official Journal of the Korean Radiological Society·Duen-Pang KuoCheng-Yu Chen
Aug 30, 2018·Investigative Radiology·Chiara GiraudoWolfgang Bogner
Nov 12, 2016·Korean Journal of Radiology : Official Journal of the Korean Radiological Society·Mina Park, Won-Jin Moon
Oct 29, 2017·Alzheimer's & Dementia : the Journal of the Alzheimer's Association·Victor MontalJuan Fortea
Aug 2, 2017·Asian Pacific Journal of Tropical Medicine·Xiang-Ying LiXiang-Jun Han
Nov 6, 2018·Korean Journal of Radiology : Official Journal of the Korean Radiological Society·Fang-Ying ChiuCheng-Yu Chen
May 9, 2019·Molecular Imaging and Biology : MIB : the Official Publication of the Academy of Molecular Imaging·Sheung-Fat KoJui-Wei Lin

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