Mapping the Target for the MRgFUS Treatment of Tremor

The proposed sequence (\<15 minutes) will be added as a supplementary sequence only for the preoperative imaging for subjects who agree to participate: a 3D multi-echo GRE sequence will be performed during a preoperative MR imaging, using the following parameters: field of view = 220x170x75 mm3, matrix = 176x136x60, 1.25-mm isotropic resolution, flip angle = 22 degrees, TR = 92 ms, 20 TEs = 1.90 - 45.98 ms with echo spacing of 2.32 ms, bandwidth = 840 Hz/pixel.

MRI will be performed using 3T scanner (Skyra, Siemens, Erlangen, Germany). All patients will undergo preoperative MRI of the brain including routine clinical MRI protocol (T1-/T2-weighted and diffusion imaging) under general anesthesia to reduce movement artifacts.