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Related Concept Videos

Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
Brain Imaging01:14

Brain Imaging

Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic Stimulation (TMS).

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Related Experiment Video

Updated: May 27, 2026

Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging
17:06

Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging

Published on: November 8, 2012

Quantitative functional MRI: concepts, issues and future challenges.

G Bruce Pike1

  • 1McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada H3A 2B4. bruce.pike@mcgill.ca

Neuroimage
|November 8, 2011
PubMed
Summary
This summary is machine-generated.

Quantitative functional magnetic resonance imaging (fMRI) advances brain activity localization. These methods clarify the blood oxygenation level dependent (BOLD) signal, crucial for neuroscience and clinical applications.

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Last Updated: May 27, 2026

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Area of Science:

  • Neuroimaging
  • Cognitive Neuroscience
  • Physiology

Background:

  • Functional magnetic resonance imaging (fMRI) using blood oxygenation level dependent (BOLD) contrast is a dominant tool for localizing brain activity in cognitive neuroscience.
  • The BOLD signal is an indirect measure of neuronal activity, influenced by complex neurovascular coupling, hemodynamics, and metabolism.

Observation:

  • Quantitative fMRI techniques measure hemodynamic and metabolic responses to brain activity modulations.
  • These methods help elucidate the origins and behavior of the BOLD signal under physiological conditions.

Findings:

  • Quantitative fMRI aids in understanding the complex relationship between neuronal activity and hemodynamic responses.
  • It provides tools for exploring pathophysiological conditions and interpreting BOLD signals in clinical contexts.

Implications:

  • Quantitative fMRI is essential for unlocking the full clinical potential of fMRI, especially where simple BOLD measurements are ambiguous.
  • These advanced techniques will enhance the power of fMRI in basic neuroscience research by providing more precise measurements.