MR Neuro Imaging - FGATIR @ Siemens 3T Skyra FGATIR – Fast Grey Acquisition TI Inversion Recovery. This sequences can be very useful for pre surgery of DBS (Deep Brain Stimulation), due to great delineation between subcortical structures. DBS depends on precise placement of the stimulating electrode into an appropriate target region.#s_mri #siemens #mri #FGATIR