64 channel head and neck coil

For this study, a 3-Tesla Prisma MRI (Siemens, Germany) located at the National Brain Mapping Laboratory (NBML) and a 64-channel head and neck coil were used. An angled mirror was placed in front of patients so that they could see the display above the patient's head. A head support system and a pad were used to reduce the head movement and motion artifacts.
The patients underwent structural and functional imaging. A 3D T1-weighted image was created using 3D spoiled gradient-recalled (SPGR) sequence with voxel size = 1.1 × 1.1 × 1 mm³, TR = 1840.0 ms, TE = 2.13 ms, and total scan time = 4.10 min. For QSM imaging, a 3D gradient-recalled echo (GRE) sequence was used with voxel size = 0.9 × 0.9 × 2.0 mm³, TR = 45.0 ms, TE1 = 6.0 ms, number of echoes = 9, distance between echoes = 4 ms, and total scan time = 7 : 24. DWI images were acquired with time of repetition (TR) = 9600 ms, time of echo (TE) = 92.0 ms, voxel size = 2.0 × 2.0 × 2.0 mm³, scan time = 5.47 min, number of diffusion directions = 30, bavlue1 = 0, and bvalue2 = 1000/mm². Functional MRI images were obtained using FA = 90 degrees, voxel size = 2.8 × 2.8 × 2.4 mm³, TE/TR = 4000/30.0 ms, repeated measurements = 90, and in a total scan time = 6.14 min.

All study participants underwent MRI examination prior to surgical MTM removal on a 3 Tesla Skyra (release VE11c, Siemens Healthineers, Erlangen, Germany) using a Siemens standard 64 channel head-and-neck coil. The used axial 3D-DESS with water excitation MRI sequence had an isotropic acquisition resolution of 0.75 × 0.75 × 0.75 mm³ together with a receive bandwidth of 355 Hz/Px. The other sequence specifications were field-of-view 242 × 242 × 78 mm³; acquisition matrix 320 × 320 × 104; slice oversampling 100%; no parallel acquisition; one signal average; acquisition time 12:24 min:s; TR/TE1/TE2 11.2/4.2/7.7 ms; flip angle 30°; selective water excitation.

The function of related brain regions will be measured using fMRI. The fMRI scan will be conducted in the medical imaging department of Rehabilitation Hospital Affiliated with Fujian University of Traditional Chinese Medicine. Siemens Prisma 3.0T MR scanner and Siemens 64-channel head and neck coil will be used for fMRI data acquisition. Scanning parameters are as follows:

High-resolution three-dimensional T1-weighted: TR = 2300 ms, TE = 2.27 ms, flip angle = 8°, slice thickness = 1.0 mm, FOV = 250 × 250 mm, matrix = 256 × 256, Voxel size = 0.98 × 0.98 × 1 mm³, and number of slices = 160.

Resting fMRI: TR = 2000 ms, TE = 30 ms, flip angle = 90°, slice thickness = 3.6 mm, FOV = 230 × 230 mm, matrix = 64 × 64, voxel size = 3.6 × 3.6 × 3.6 mm³, number of slices = 37, axial slices = 35, and phases per location = 240.

EEG measurements will include different frequency bands (front α, α, β, δ, and θ) of spectral power and θ/α ratio. Receiver operating characteristic (ROC) analysis will be performed to evaluate the accuracy of EEG as a diagnostic indicator.

All scans were performed on a 60 cm bore, 3T Prisma scanner (Siemens, Erlangen, Germany, software version VD13D or VE11C) with a 64-channel head and neck coil (Siemens, Erlangen) at one of three sites: Hunter Medical Research Institute (NSW, Australia), Herston Imaging Research Facility (QLD, Australia), or the Princess Alexandra Hospital (QLD, Australia).

The MRI data were collected using Siemens Skyra 3 T MRI scanner using a 64-channel head and neck coil at the XXX Institute. The structural 3D T1-weighted images were collected using magnetization prepared-rapid gradient echo (MP-RAGE) sequence with TR/TE/flip angle = 2200 ms/1.76 ms; matrix = 256 × 256 × 208, and resolution = 1.0 × 1.0 × 1.0 mm. The total time for the MP-RAGE acquisition was 4 min. The diffusion tensor imaging data were acquired using a multi-slice spin echo-planner imaging sequence with TR/TE = 3300 ms/115 ms, matrix = 114 × 114 × 72, resolution = 2.0 × 2.0 × 2.0 mm³, and b-values = 8 × b = 0 s/mm² + 27 directions with b = 1000 s/mm² + 62 directions with b = 2500 s/mm². A reversed phase encoding DTI data with 6 × b = 0 s/mm² were also acquired for EPI distortion correction during data pre-processing. The total time for the DTI acquisition was 10 min.