Practical aspects of functional MRI.

Functional MRI (fMRI) allows cognitive processes to be studied on an indivi dual basis. fMRI is at the crossing of many fields, such as physiology, MRI physics, cognitive neurosciences, data analysis,... Hence, it requires the collaboration of interdisciplinary teams, bl which neuroradiologists shoul d play an important role. This article provides art overview of the general principles necessary to conduct fMRI studies on a practical matter (choise of magnetic field, patient set-up and preparation, paradigm design, data a cquisition and analysis).