Neuroimaging Services Glossary

Quantitative assessment of imaging data within predefined anatomical or functional regions of interest.

Functional MRI analysis method examining temporal correlations between a predefined brain region and all other voxels.

Process of optimizing magnetic field homogeneity in MRI scanners to improve image quality and reduce artifacts.

Loss of MRI signal in specific tissue regions due to technical or physiological factors.

Process of defining imaging plane orientation, thickness, and coverage for MRI acquisition.

A preprocessing step in fMRI analysis that compensates for the temporal offset between slice acquisitions within each vo...

MR technique measuring metabolite concentrations in brain tissue through chemical shift analysis.

Analytical framework for statistical analysis of neuroimaging data using voxel-wise hypothesis testing.

Physical white matter connections between brain regions mapped through diffusion tractography methods.

MRI image distortion caused by magnetic field inhomogeneity at interfaces between tissues with different magnetic proper...

Geometric distortion in MRI images caused by local magnetic field inhomogeneities, particularly prominent at tissue-air...

MRI technique measuring tissue magnetic susceptibility differences to detect iron, calcium, and blood products.

A linear hypointense signal within an acute stroke lesion on gradient echo sequences, indicating the presence of a throm...

MRI sequence that enhances contrast between tissues with different magnetic susceptibilities, particularly sensitive to...

Susceptibility-weighted imaging sequence that enhances visualization of venous structures and blood products by exploiti...

MRI sequence that emphasizes differences in T1 relaxation times between tissues, providing excellent anatomical detail a...

MRI sequence that emphasizes differences in T2 relaxation times between tissues, producing bright signal from fluid-cont...

MRI sequence sensitive to local magnetic field inhomogeneities, particularly useful for detecting hemorrhage.

Echo time - the interval between radiofrequency pulse and signal readout in MRI sequences.

A measure of image quality in functional MRI that quantifies the stability of voxel intensity over time relative to nois...

Inversion time - the delay between inversion pulse and excitation pulse in inversion recovery sequences.

Non-contrast MRI technique that creates vascular images by exploiting the flow-related enhancement of moving blood relat...

Repetition time - the interval between successive radiofrequency pulse sequences in MRI.

A three-dimensional visualization of white matter fiber pathways reconstructed from diffusion tensor imaging data.