Neuroimaging Services Glossary

Directional dependence of water diffusion in organized tissue structures like white matter tracts.

Quantitative parameter derived from diffusion-weighted imaging that measures the magnitude of water diffusion in tissue,...

Non-invasive MRI perfusion technique that uses magnetically labeled arterial blood water as an endogenous tracer to meas...

Automated method for identifying brain regions using standardized anatomical templates.

Spatial variation in the main magnetic field strength that causes signal distortion and artifacts in MRI images.

The physiological basis of fMRI signal changes, reflecting local variations in deoxyhemoglobin concentration during neur...

Blood oxygen level-dependent signal changes that indicate neural activity in fMRI.

Automated removal of non-brain tissue from neuroimages to isolate brain parenchyma for subsequent analysis.

Quantitative measurement of brain tissue volumes and structures from neuroimaging data.

Downward displacement of cerebellar tonsils through the foramen magnum, potentially causing brainstem compression.

Motion-related signal changes in MRI caused by the pulsatile flow of cerebrospinal fluid.

Ghosting artifacts in MRI caused by rhythmic CSF flow, appearing as repetitive signals along the phase-encoding directio...

The brain's capacity to maintain adequate blood flow through compensatory mechanisms when normal perfusion is compromise...

MRI artifact causing spatial misregistration of fat and water tissues due to different resonance frequencies, appearing...

Comprehensive map of neural connections within the brain, derived from neuroimaging data.

Abnormal leakage of contrast agent from blood vessels into brain tissue due to blood-brain barrier disruption.

Temporal relationship between contrast agent injection and image acquisition to optimize enhancement patterns.

The time-dependent clearance of contrast agent from brain tissue, providing information about vascular permeability and...

Spatial alignment of multiple imaging datasets to enable direct comparison and analysis.

Quantitative measure of the distance between the gray matter-white matter boundary and the pial surface, typically measu...

A brain network active during rest and introspective tasks, including medial prefrontal cortex, posterior cingulate, and...

Digital Imaging and Communications in Medicine standard for medical image storage and transmission.

Signal distortions in DTI sequences caused by eddy currents, motion, or field inhomogeneities that compromise fiber trac...

Diffusion tensor imaging technique that maps white matter fiber tracts in the brain.