FMRI Snapshot File
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An FMRI Snapshot File is a visual snapshot file that involved the use of magnetic resonance imaging.
- AKA: Functional Magnetic Resonance Imaging, functional MRI.
- See: Near Infrared Spectroscopy, Functional Neuroimaging, Magnetic Resonance Imaging, Blood-Oxygen-Level Dependent, Seiji Ogawa, Neuron, Brain, Spinal Cord, Hemodynamic Response, Diffusion MRI, EEG.
References
2015
- (Wikipedia, 2015) ⇒ http://en.wikipedia.org/wiki/Functional_magnetic_resonance_imaging Retrieved:2015-10-8.
- Functional magnetic resonance imaging or functional MRI (fMRI) is a functional neuroimaging procedure using MRI technology that measures brain activity by detecting associated changes in blood flow. {{Other methods of obtaining contrast are arterial spin labeling and diffusion MRI. The procedure is similar to MRI but uses the change in magnetization between oxygen-rich and oxygen-poor blood as its basic measure. This measure is frequently corrupted by noise from various sources and hence statistical procedures are used to extract the underlying signal. The resulting brain activation can be presented graphically by color-coding the strength of activation across the brain or the specific region studied. The technique can localize activity to within millimeters but, using standard techniques, no better than within a window of a few seconds.fMRI is used both in the research world, and to a lesser extent, in the clinical world. It can also be combined and complemented with other measures of brain physiology such as EEG and NIRS. Newer methods which improve both spatial and time resolution are being researched, and these largely use biomarkers other than the BOLD signal. Some companies have developed commercial products such as lie detectors based on fMRI techniques, but the research is not believed to be ripe enough for widespread commercialization.