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Related Concept Videos

Assessment of Diffusion and Perfusion01:17

Assessment of Diffusion and Perfusion

Understanding and evaluating diffusion and perfusion is critical in assessing a patient's respiratory and circulatory health. These processes play key roles in maintaining the body's internal environment, ensuring that tissues receive adequate oxygen while waste products are efficiently removed.
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this principle...

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Related Experiment Video

Updated: Jun 23, 2026

Measuring Connectivity in the Primary Visual Pathway in Human Albinism Using Diffusion Tensor Imaging and Tractography
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Published on: August 11, 2016

[Brain apparent diffusion coefficient: differences caused by age, sex, laterality, and distinct b value].

J M García Santos1, C Ordóñez González, S Torres del Río

  • 1Area de Neurorradiología de Cabeza y Cuello, Servicio de Radiodiagnóstico, Hospital General Universitario Morales Meseguer, Murcia, Spain. josem.garcia11@carm.es

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|May 5, 2009
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Summary

Higher b-value diffusion imaging (b3000) shows stable apparent diffusion coefficient (ADC) values in the aging brain, suggesting its utility for neurodegenerative disease research.

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Related Experiment Videos

Last Updated: Jun 23, 2026

Measuring Connectivity in the Primary Visual Pathway in Human Albinism Using Diffusion Tensor Imaging and Tractography
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Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
09:33

Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases

Published on: July 28, 2013

Area of Science:

  • Neuroimaging
  • Diffusion Tensor Imaging (DTI)
  • Neurodegenerative Diseases

Context:

  • Apparent diffusion coefficient (ADC) is a key MRI metric for assessing brain tissue microstructure.
  • Aging and neurodegenerative diseases can alter brain tissue properties, affecting ADC values.
  • Different b-values in dMRI may provide complementary information about tissue microstructure.

Purpose:

  • To investigate the impact of age and sex on ADC values in specific brain regions (corpus callosum, hippocampus) using different b-values (b1,000 and b3,000).
  • To analyze the diffusion differential (DD), a measure of ADC difference between b-values, across age groups and sexes.
  • To explore the correlation between ADC, DD, and age in normal individuals.

Summary:

  • Diffusion imaging with a higher b-value (b3,000) demonstrated greater stability in mean ADC values across different age groups compared to b1,000.
  • Significant age-related differences in ADC and DD were observed in the right hippocampus.
  • Sex differences in DD were noted in the genu of the corpus callosum.

Impact:

  • Findings suggest that higher b-value diffusion imaging may offer more robust ADC measurements for tracking age-related changes and potentially neurodegenerative processes.
  • This study highlights the importance of considering b-value selection in dMRI protocols for neuroimaging research.
  • The results may inform future studies aiming to detect subtle microstructural alterations in the aging brain and in neurodegenerative conditions.