Magnetom skyra 3 tesla mri scanner

Sheep were scanned at 5, 7, 10, 14 and 18 months of age using a MAGNETOM Skyra 3 Tesla MRI scanner (Siemens Healthcare, Erlangen, Germany), with a 20-channel head coil. At each timepoint, sheep were scanned over a period of three weeks based on birth order. Scanning personnel were blinded to genotype.
On arrival at the scanning facility, sheep were sedated by intravenous injection of 0.5 mg/kg live weight diazepam (Troy Laboratories NZ Pty Ltd, Auckland, NZ) and 10 mg/kg live weight ketamine (Phoenix Pharm Distributors Ltd, Auckland, NZ) prior to endotracheal intubation and maintenance on inhalation anaesthesia (isoflurane in oxygen, 1.5–3% v/v to effect).
Structural imaging was performed to measure tissue volumes using a T1-weighted magnetization-prepared rapid gradient-echo sequence: echo time/repetition time = 2.02/2500 ms, inversion time = 900 ms, flip angle = 12deg, Field of view = 192 mm, slice thickness = 0.75 mm, matrix = 256 × 256, voxel size = 0.75 × 0.75 × 0.75 mm³, NEX = 4, scan time =25:32 min and slice acceleration GRAPPA = 2.

In this case, we obtained images of the upper airway in four subjects (two male and two female) Representative images obtained from one subject are presented in Figure 2. We include these images to make clear the configuration of the pharyngeal airway in the production of of /i/, /æ/, /u/, /ɑ/. Images were obtained using a Siemens Magnetom Skyra 3 Tesla MRI Scanner (University of Arizona, MRI Facility) and subjects lay supine in the scanner and received instructions from the experimenter via headphones prior to each production. Note that audio and motor unit recordings were not attempted during imaging sequences.
Sagittal, axial and coronal planes were imaged (on all planes: TE: 10 ms, TR: 1500 ms, ETL: 5 ms, FOV: 150 cm, Flip angle: 160°). For all scan types, an anterior neck coil (four element Flex coil, München, Germany) was used so that the desired portion of the head and neck were brought into the scanning field of view. To image GG muscle fibers for each vowel, a series of fifteen 3-mm thick contiguous, parallel, sagittal sections were gathered in an interleaved acquisition. The image set extended from just above the sinus cavities to the inferior border of the mandible.

T1-weighted structural MRI sequences were acquired for each participant using a Siemens Magnetom Skyra 3-Tesla MRI scanner (Erlangen, Germany), with the following parameters: inversion time (TI) = 900 ms, repetition time (TR) = 1900 ms, echo time (TE) = 2.43 ms, resolution = 256 × 256, flip angle = 9, field of view (FOV) = 256 mm, slice thickness = 1.00 mm (176 slices). The T1-weighted MRI scans were then segmented and normalised to standard spaces using the ‘fMRIprep’ pre-processing pipeline. Cortical surface estimations, comprising the white matter surface and the pial surface, were generated using FreeSurfer (version 6.0.0; Fischl^{37 (link)}). To ensure quality control, cortical surface estimations were visually inspected and manually corrected where necessary. The corrected cortical surfaces were inflated and parcellated into 68 (34 left and 34 right) distinct cortical grey matter regions based on the Desikan-Killiany parcellation atlas^{38 (link)}.