MRI BY DIRECT TRANSVERSE HYPERPOLARIZATION USING LIGHT ENDOWED WITH ORBITAL ANGULAR MOMENTUM

摘要

A magnetic resonance system includes a main magnet (12,12', 12") which generates a static magnetic field B₀ in an examination region (14,14',14"). A hyperpolarization device (26,26',26") directly hyperpolarizes nuclear spins via electromagnetic radiation endowed with orbital angular momentum transverse to the static magnetic field B₀ for inducing magnetic resonance. The hyperpolarization device includes an orientation tracking unit (100) which determines an orientation of the endowed photon beam relative to a predefined external coordinate system. An orientation modifier (104) adjusts the orientation of the endowed photon beam to an optimal orientation according to the determined relative orientation.