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DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
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Related Experiment Video

Updated: Feb 8, 2026

Probing the Brain in Autism Using fMRI and Diffusion Tensor Imaging
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Inter-Vendor and Inter-Session Reliability of Diffusion Tensor Imaging: Implications for Multicenter Clinical Imaging

Jeeyoung Min1, Mina Park1, Jin Woo Choi1

  • 1Department of Radiology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul 05030, Korea.

Korean Journal of Radiology
|July 3, 2018
PubMed
Summary

Diffusion Tensor Imaging (DTI) shows reliable Fractional Anisotropy (FA) across vendors and sessions. However, Mean Diffusivity (MD) and Radial Diffusivity (RD) values varied, impacting multicenter study reliability.

Keywords:
BrainDiffusion tensor imagingMagnetic resonanceReliabilityReproducibility

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Area of Science:

  • Neuroimaging
  • Radiology
  • Biomedical Engineering

Background:

  • Diffusion Tensor Imaging (DTI) is crucial for assessing white matter integrity.
  • Evaluating the reliability of DTI parameters across different vendors and scanning sessions is essential for multicenter research.

Purpose of the Study:

  • To assess the inter-vendor and inter-session reliability of DTI parameters.
  • To determine the consistency of Fractional Anisotropy (FA), Mean Diffusivity (MD), and Radial Diffusivity (RD) values.

Main Methods:

  • Prospective study with 10 healthy subjects.
  • Scans performed twice on 3T MRI scanners from three vendors at two sites.
  • Voxel-wise analysis using Tract-Based Spatial Statistics and calculation of FA, MD, and RD values.

Main Results:

  • FA values demonstrated good inter-vendor and inter-session reliability.
  • Significant differences in MD values were observed between vendors (p=0.020).
  • Significant interactions indicated differences in MD and RD between sessions across vendors (p=0.004, p=0.006).

Conclusions:

  • FA values are reliable for DTI studies across vendors and sessions.
  • MD and RD values showed inconsistent results, highlighting potential limitations.
  • Researchers should consider these DTI parameter variabilities in multicenter studies.