Magnetom trio tim system 3t

We acquired anatomical images for co-registration with the 3 T Magnetom Tim Trio system (Siemens Healthcare, Erlangen, Germany) with 3D T1-weighted high-resolution anatomic scan of magnetization-prepared rapid acquisition gradient echo (MPRAGE) sequence. We co-registered PET images with individual MR images to an MR template, and evaluated the quality of each co-registration by visual inspection in 3 planes. PET and MR-images were co-registered and entered in Talairach space, and anatomical volumes of interest were used to extract time-activity-curves (TACs) from the dynamic PET images for the [¹⁸F]FDG analyses of cortex as a whole.

Imaging occurred only after complete surgical removal of the initially implanted DBS System. Anatomical and diffusion tensor imaging was performed on a clinical 3-Tesla MRI system (Siemens Magnetom Trio Tim System 3 T, Erlangen, Germany). Anatomical sequences: 12-channel head coil, 3D MPRAGE (Magnetisation Prepared Rapid Gradient Echo): TR 390 ms, TE 2.15 ms, TI 800 ms, Flip angle 15°, voxel size 1.0 × 1.0 × 1.0 mm³, acquisition time 3:15 min. 3D T2 SPACE-sequence: TR 2500 ms, TE 231 ms, echo train length 141, flip-angle variable, voxel size 1.0 × 1.0 × 1.0 mm³, acquisition time 6:42. Diffusion tensor imaging: Single shot 2D SE EPI, TR 10,000 ms, TE 94 ms, diffusion values b = 0 s/mm², b = 1000 s/mm², diffusions directions 61, slice count 69, voxel size 2.0 × 2.0 × 2.0 mm³, acquisition time 11:40. Deformation correction of the EPI sequence according to Zaitsev et al. 2004 [24 (link)]. Postoperative imaging was performed with helical computed tomography (hCT).

Anatomical and diffusion tensor imaging was performed on a clinical 3-Tesla MRI system (Siemens Magnetom Trio Tim System 3T, Erlangen, Germany) a day before surgery under mild sedation with oral Lorazepam (1–2.5 mg, Pfizer, Berlin, Germany). Anatomical sequences: 12-channel head coil, 3D MPRAGE (Magnetisation Prepared Rapid Gradient Echo): TR 1 390 ms, TE 2.15 ms, TI 800 ms, flip angle 15°, voxel size 1.0 × 1.0 × 1.0 mm³, acquisition time 3:15. 3D T2 SPACE-sequence: TR 2 500 ms, TE 231 ms, echo train length 141, flip angle variable, voxel size 1.0 × 1.0 × 1.0 mm³, acquisition time 6:42. Diffusion tensor imaging: single shot 2D SE EPI, TR 10,000 ms, TE 94 ms, diffusion values b = 0 s/mm², b = 1000 s/mm², diffusions directions 61, slice count 69, voxel size 2.0 × 2.0 × 2.0 mm³, acquisition time 11:40. Deformation correction of the EPI sequence according to Zaitsev et al. 2004 [26 (link)].

Anatomical and diffusion tensor imaging is performed on a clinical 3 Tesla MRI system (Siemens Magnetom Trio Tim System 3T, Erlangen, Germany) a day before surgery under mild sedation with oral Lorazepam (1 - 2.5mg, Pfizer, Berlin, Germany) using a 12-channel head coil.
Deterministic Fiber tracking is performed on a Linux workstation using StealthViz DTI (Medtronic Navigation, Louisville, Colorado). An internal transfer procedure is used to fuse the line-graphic depiction of the DRT to the DICOM (Digital Imaging and Communications in Medicine) image that further serves for navigation purposes. With this procedure, the DRT becomes part of the stereotactic planning data. Fiber tracking of the cerebello-thalamo-cortical network (DRT) and surrounding structures (cortico-spinal tract) have been previously described [7 (link),14 (link)-16 (link)].