Mechanism
Flow-sensitive images show increased perfusion with stimulation, while blood oxygenation–sensitive images show…
Advances in Functional Brain Mapping
The popularity of fMRI is based on many factors. It is safe…
Radiofrequency Coils
Radiofrequency (RF) coils are components of every scanner and are used for…
Magnetic Field Homogeneity
The necessary degree of spatial uniformity of the field can be achieved…
Superconducting Magnets
Since the early 1980s, the use of cryogenically cooled superconducting magnets has…
Resistive Magnets
The first whole-body scanners, manufactured in the late 1970s and early 1980s,…
Permanent Magnets and Electromagnets
Both these magnet types use magnetized materials to produce the field that…


