PURPOSE To establish a normal baseline of the percent magnetization transfer of gray (cortical and deep) and white matter structures in the brain in healthy adults and to determine whether there are adult age-related differences in these measurements. METHODS Axial T1-weighted scans (800/20 [repetition time/echo time]) with and without magnetization transfer were prospectively performed on a ...

MRI is used routinely in clinical practice and pharmaceutical trials to measure disease activity and assess the effects of treatment in multiple sclerosis. Conventional MRI techniques sensitively detect inflammation, demyelination, and tissue injury. Less conventional imaging modalities, such as magnetic resonance spectroscopy and magnetization transfer imaging, and advanced image processing to...

A mechanism is proposed for manipulating the magnetic state of a helical spin density wave using a current. It is shown that a current through a bulk metal with a helical spin density wave induces a spin transfer torque, which gives rise to a rotation of the order parameter. The use of spin transfer torque to manipulate the magnetization in bulk systems does not suffer from the obstacles seen f...