<unk> , or BOLD-contrast<unk> , is a method used in functional magnetic resonance<unk>  (fMRI) to observe different areas of the brain or other organs, which are found to be active at any given time.
Blood-oxygen-level-dependent imaging
Arterial spin labelling
Perfusion scanning
Perfusion MRI
Functional near-infrared spectroscopy
Oxygen enhancement ratio
Functional imaging
Diffusion MRI