Magnetom prisma 3 tesla mri

An MRI-guided mock-DBS surgical procedure using the 3D-printed stereotactic system was developed and performed on human cadavers and deemed exempt by the Mayo Clinic’s Institutional Review Board (Supplemental Information) [30 (link)]. The specimen group consisted of four male human cadaver heads. MRI imaging was conducted in a Siemens™ (Munich, Germany) Magnetom Prisma 3 Tesla MRI, using the MPRAGE pulse sequence. CT imaging was conducted in a Siemens™ Somatom Definition Flash scanner. The surgical time for device platform placement and both unilateral and bilateral lead implantations were recorded in the last four of five experiments. The device platform placed in experiment 1 was left secured to the cadaveric specimen for experiment 2, and thus only three device platform placement times were recorded. After implantation, the vector error (3D Euclidean distance from the distal end of the first contact to the intended target) and the radial error (shortest 2D difference from the intended trajectory to the center of the implanted lead) were calculated using the post-operative CT image.

The challenge of designing a close-fitting full-coverage neck coil is illustrated by the different neck shapes shown in Figure 1. To test and illustrate the concept of the NSS coils, a medium and a large coil former were shaped to fit two different neck sizes and on each former, a coil was designed, constructed and tested.
Phantom and human studies were performed to evaluate and demonstrate the value of the NSS coils. All imaging studies were performed on a Siemens MAGNETOM Prisma 3 Tesla MRI scanner, supplemented with the Siemens 20 channel head/neck and Siemens 32 channel spine coil. For the remainder of the text in this document the Siemens 20 channel head/neck coil will be referred to as either the OEM head/neck, OEM head, or OEM neck coil depending on whether the 20 channels of the head/neck, 16 channels of the head, or 4 channels of the neck are utilized. Additionally, there are 2 anterior (OEM anterior neck) and 2 posterior (OEM posterior neck) coil elements in the OEM neck coil and for the Siemens 32 channel spine (OEM spine) coil only 4 superior coil elements were used.