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Yoshiroh Satake

Bio: Yoshiroh Satake is an academic researcher from University of Tokyo. The author has contributed to research in topics: Diffusion MRI & Transverse plane. The author has an hindex of 2, co-authored 2 publications receiving 15 citations.

Papers
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Journal ArticleDOI
TL;DR: Distortion correction is effective in providing DTI of enhanced quality, notwithstanding the number of encoding directions, and visual image quality was improved after distortion correction.
Abstract: Purpose The aim of the study was to estimate the effect of distortion correction with correspondence to numbers of encoding directions to acquire diffusion tensor imaging (DTI) of improved quality.

8 citations

Journal ArticleDOI
TL;DR: An able-bodied person DB is created by axial plane imaging of VSRAD, a VBM system that uses MRI, and the Z-score of the intrahippocampal region improved by 8 in 13 instances, and in all brains, theZ-score improved by 13 in all instances.
Abstract: In recent years, voxel-based morphometry (VBM) has become a popular tool for the early diagnosis of Alzheimer disease. The Voxel-Based Specific Regional Analysis System for Alzheimer's Disease (VSRAD), a VBM system that uses MRI, has been reported to be clinically useful. The able-bodied person database (DB) of VSRAD, which employs sagittal plane imaging, is not suitable for analysis by axial plane imaging. However, axial plane imaging is useful for avoiding motion artifacts from the eyeball. Therefore, we created an able-bodied person DB by axial plane imaging and examined its utility. We also analyzed groups of able-bodied persons and persons with dementia by axial plane imaging and reviewed the validity. After using the DB of axial plane imaging, the Z-score of the intrahippocampal region improved by 8 in 13 instances. In all brains, the Z-score improved by 13 in all instances.

7 citations


Cited by
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Journal ArticleDOI
TL;DR: The results of this study support the potential use of DTI as a biomarker for predicting functional impairment in patients with cervical spondylosis and suggest FA and ψ could identify stenosis patients with mild-to-moderate symptoms with a relatively high sensitivity and specificity.

67 citations

Journal ArticleDOI
TL;DR: Diffusion tensor imaging tractography provides a practical complementary method to study the OR and the Meyer loop anatomy in vivo with reference to individual 3-dimensional brain anatomy.
Abstract: Background Knowledge of the individual course of the optic radiations (OR) is important to avoid post-operative visual deficits. Cadaveric studies of the visual pathways are limited because it has not been possible to accurately separate the OR from neighboring tracts and results may not apply to individual patients. Diffusion tensor imaging (DTI) studies may be able to demonstrate the relationships between the OR and neighboring fibers in vivo in individual subjects.

46 citations

Journal ArticleDOI
02 Oct 2015-PLOS ONE
TL;DR: A linear combination of DTI and MRS measurements within the cervical spinal cord may be useful for accurately predicting neurological deficits in patients with cervical spondylosis.
Abstract: Purpose In the present study we investigated a combination of diffusion tensor imaging (DTI) and magnetic resonance spectroscopic (MRS) biomarkers in order to predict neurological impairment in patients with cervical spondylosis.

43 citations

Journal ArticleDOI
TL;DR: The optimization of data acquisition parameters could improve the quality of breast DT-MRI images and assist fiber tractography at 1.5 T.

16 citations

Journal ArticleDOI
TL;DR: To demonstrate the sensitivity of quantitative diffusion tensor tractography to traumatic injury of the uncinate fasciculus, and to evaluate the effect of volume changes on the accuracy of quantitative analysis.
Abstract: Purpose To demonstrate the sensitivity of quantitative diffusion tensor tractography to traumatic injury of the uncinate fasciculus (UF), and to evaluate the effect of volume changes on the accuracy of quantitative analysis Materials and Methods Diffusion tensor imaging (DTI) was performed at 3 T for 110 patients with traumatic brain injury (TBI) and 60 control subjects Volume, mean diffusivity (MD), and mean fractional anisotropy (FA) of the UF were measured by means of tractography The influence of FA threshold on mean FA values was determined and the values were further related to the tract volume Results In patients with TBI, 16% of the volumes and 29% of the FA values were decreased and 25% of the MD values were increased (>2 SD from the mean of controls) Small tracts (6% of trajectories) often had normal mean FA, but low volume-related FA values Large UFs often had decreased mean FA values, but normal volume-related central values (3% of trajectories) Conclusion Posttraumatic FA and MD changes and volume reductions are common in the tractography of UF Trauma-induced volume changes can cause misleading whole-tract mean FA values Therefore, additional volume-based analysis of the central part is beneficial for clinical assessment J Magn Reson Imaging 2013;38:46–53 © 2012 Wiley Periodicals, Inc

15 citations