The MRI data were collected using a 3T Siemens Prisma_Fit scanner with a 20-channel phased-array head coil at the Magnetic Resonance Imaging Lab, South China Normal University, Guangdong, China. A gradient echo-planar imaging sequence was used with the following parameters: slice thickness = 3 mm, interslice gap = 1 mm, echo time (TE) = 30 ms, repetition time (TR) = 2,000 ms, flip angle = 90°, matrix size = 64 × 64, field of view = 192 mm, and 32 axial slices that covered the whole brain. The T1-weighted three-dimensional structural images were acquired by using a magnetization-prepared rapid gradient-echo sequence, TE = 2.52 ms, TR = 2,530 ms, flip angle = 7°, and voxel size = 1 × 1 × 1 mm3.
20 channel phased array head coil
Manufactured by Siemens
Sourced in Germany
The 20-channel phased-array head coil is a specialized piece of laboratory equipment designed for magnetic resonance imaging (MRI) applications. Its core function is to facilitate the acquisition of high-quality, detailed images of the human head and brain by utilizing a phased-array design, which allows for improved signal-to-noise ratio and accelerated image acquisition.
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8 protocols using 20 channel phased array head coil
1
High-Resolution Brain Imaging Protocol
2
High-resolution 3D Functional MRI Protocol
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Imaging was performed in a 3 Tesla Siemens Skyra scanner with echo planar capability and a 20-channel phased array head coil. We acquired a T1-weighted high-resolution 3D data set for each subject for anatomical referencing (spatial resolution 0.9 mm isotropic) in the anterior commissure posterior commissure plane. For functional BOLD imaging an EPI sequence was acquired in the same position as the anatomical images (repetition time: 2500 ms; echo time (TE): 30 ms; 43 transversal slices; slice thickness: 3 mm; gap: 0.4 mm, number of volumes: 450; 2 dummy volumes, field of view: 448x448, matrix: 64x64, isotropic voxel-size: 1 mm3).
3
Functional MRI Acquisition Protocol
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Imaging data were collected using a 3.0 Tesla MRI scanner (Siemens) with a 20-channel phased-array head coil and a bottom-up interleaved Echo Planar Imaging (EPI) sequence. For the experimental scan: TR = 2.1 s, TE = 30 ms, flip angle = 80°, FOV = 192 × 192 × 108 mm, matrix size = 64 × 64, number of volumes = 213, voxel size = 3 × 3 mm, slice thickness = 3 mm with no inter-slice gap and 36 slices were acquired. For the functional localiser scan: TR = 2 s, TE = 30 ms, flip angle = 80°, FOV = 192 × 192 × 108 mm, matrix size = 64 × 64, number of volumes = 227, voxel size = 3 × 3 mm, slice thickness = 3 mm with no inter-slice gap and 36 slices were acquired. A T1-weighted structural image was obtained for each participant (TR = 2.3 s, TE = 2.26 ms, flip angle = 8°, FOV = 256 × 256, voxel size = 1 × 1, slice thickness = 1 mm, number of slices = 176) and a T1-weighted FLAIR image (TR = 3 s, TE = 8.6 ms, flip angle = 150°, FOV = 192 × 192 mm, matrix size = 256 × 256, voxel size = 0.75 × 0.75 mm, slice thickness = 3.0 mm, number of slices = 36) was taken in the same plane as the EPI data, for co-registration of the functional data to the structural image.
4
Multimodal fMRI Protocol for Brain Imaging
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Functional magnetic resonance imaging data were collected on a whole-body 3 Tesla T.I.M. Trio scanner (Siemens Healthcare, Erlangen, Germany) equipped with a 20-channel phased-array head coil. The MRI sessions comprised a standard DTI sequence, a resting-state measure of 13 min with eyes open, in addition to an MPRAGE, a FLAIR sequence, and a task-based fMRI. The anatomical T1-weighted MPRAGE structural scan parameters were as follows: TE = 2.03 ms, TR = 5000 ms, FOV = 256x240 with 176 slices, resolution = 1x1x1mm3. The resting-state BOLD scans were acquired using an echo-planar acquisition protocol with the following parameters: 34 slices, TR = 2300 ms, TE = 30 ms, acquisition matrix = 64x64, and voxel size of 3x3x3.99 mm3, flip = 90 deg.
5
Resting-State fMRI Acquisition Protocol
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A 3.0-T Siemens MR system (SKYRA) equipped with a 20-channel phased-array head coil was used for the MRI scan. The resting-state functional magnetic resonance imaging(rs-fMRI) data of the whole brain were acquired by a gradient echo-planar imaging sequence. The parameters included: repetition time (TR) = 2,000 ms, echo time (TE) = 30 ms, number of axial slices = 35, slice thickness = 4 mm, slice gap = 0.2 mm, flip angle = 90°, image matrix size = 64 × 64, voxel size = 3.75 × 3.75 × 4 mm3, and field of view (FOV) = 240 × 240 mm2. The rs-fMRI lasted 8 min in total, and 255 volumes were acquired for each participant. High-resolution T1-weighted anatomical images were acquired using a magnetization prepared rapid gradient echo sequence (TR = 1,900 ms, TE = 2.25 ms, 176 slices, slice thickness = 1 mm, flip angle = 9°, matrix size = 256 × 256, voxel size = 1 × 1 × 1 mm3). All participants were instructed to remain relaxed and awake with their eyes closed and without directed thoughts during scanning.
6
Orbital MRI with Siemens Magnetom Skyra
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A Siemens Magnetom Skyra 3.0 T (Siemens Healthcare, Erlangen, Germany) MR scanner and a 20-channel phased array head coil were used to examine patients in the supine position. Patients were instructed to close their eyes and fix their eyeballs directly in front. The scanning range included the orbit and optic nerve. The scanning sequence included a conventional orbital plain scan sequence and coronal Dixon and SPAIR fast spin-echo (turbo spin-echo, TSE) T2WI. The specific scanning parameters are listed in Table 2 .
7
Whole-Brain Imaging with 3T MRI
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MRI data were acquired on a 3T Siemens Prisman Fit scanner with a 20‐channel phased‐array head coil at the Magnetic Resonance Imaging Lab, South China Normal University. A gradient echo‐planar imaging sequence was used with the following parameters: slice thickness = 3 mm, interslice gap = 1 mm, TE = 30 ms, TR = 2000 ms, flip angle = 90°, matrix size = 64 × 64, FOV = 192 mm, and 32 axial slices covering the whole brain. T1‐weighted 3D structural images were acquired by using an MP‐RAGE sequence: TE = 2.52 ms, TR = 2530 ms, flip angle = 7°, voxel size = 1 × 1 × 1 mm3.
8
Multimodal MRI Acquisition for Functional Neuroimaging
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Imaging data were collected using a 3.0 Tesla MRI scanner (Siemens) with a 20-channel phased-array head coil and a bottom up interleaved echo planar imaging (EPI) sequence. For the experimental scan: TR = 2.1s, TE = 30ms, ip angle = 80 degrees, FOV = 192x92x108mm, matrix size = 64x64, number of volumes =213, voxel size = 3x3mm, slice thickness = 3mm with no inter-slice gap and 36 slices were acquired. For the functional localiser scan: TR = 2s, TE = 30ms, ip angle = 80 degrees, FOV = 192x192x108mm, matrix size = 64x64, number of volumes = 227, voxel size = 3x3mm, slice thickness = 3mm with no inter-slice gap and 36 slices were acquired. A T1-weighted structural image was obtained for each participant (TR = 2.3s, TE = 2.26ms, ip angle = 8 degrees, FOV = 256x256, voxel size = 1x1, slice thickness =1mm, number of slices = 176) and a T1-weighted FLAIR image (TR = 3s, TE = 8.6ms, ip angle = 150 , FOV = 192x192mm, matrix size = 256 x 256, voxel size = 0.75x0.75mm, slice thickness = 3.0mm, number of slices = 36) was taken in the same plane as the EPI data, for co-registration of the functional data to the structural image.
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