Structural T1-weighted MRI images and task-based fMRI images were acquired on a 3T GE scanner with an 8-channel GE head coil. Structural T1-weighted MRI images of all participants were acquired using the magnetization-prepared rapid gradient-echo (MPRAGE) sequence with the following parameters: TR = 5.6 ms, TE = 1.8 ms, flip angle = 15o, slice thickness = 1 mm, FOV = 240 × 240 mm2, voxel size = 0.94 × 0.94 × 1 mm3, number of slices = 200, and sagittal acquisition. Task-based fMRI images of 60 participants (20 concordant, 21 robust and 19 susceptible) were acquired using T2*-weighted single-shot gradient-echo-planar imaging (EPI) sequence with the following parameters: TR = 2000 ms, TE = 30 ms, flip angle = 90°, FOV = 224 × 224 mm2, voxel size = 3.5 × 3.5 × 3.5 mm3, number of slices = 40, number of volumes = 240, and axial acquisition.
8 channel ge head coil
Manufactured by GE Healthcare
Sourced in United States
The 8-channel GE head coil is a diagnostic imaging device used in magnetic resonance imaging (MRI) procedures. It is designed to receive and transmit radio frequency (RF) signals from the patient's head during the MRI scan, providing high-quality imaging data for medical professionals to analyze.
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6 protocols using 8 channel ge head coil
1
Multimodal Neuroimaging Protocol for Brain Function
2
3T MRI Brain Imaging Protocol
3
Post-Injury Brain MRI Protocol
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3 T MRI (GE Signa HDxt, GE Medical Systems, Milwaukee, WI, USA) data were obtained 12 months post-injury using two different head coils (12 channel Head/Neck/Spine (HNS) and standard 8channel GE head coil). For diffusion-weighted imaging, a 2D spin-echo whole-brain echo planar imaging pulse with the following parameters was used: repetition time (TR) = 15 s, echo time (TE) = 81.2–85.6 ms (defined as minimum), flip angle = 90°, slice thickness = 2.5 mm, field of view (FOV) = 240 × 240 mm, acquisition matrix = 96 × 96(reconstructed to128 × 128), reconstructed in-plane resolution = 1.875*1.875 mm/pix, 30 volumes with different gradient directions (b = 1000 s/mm2) and two b = 0 volumes with reversed phase-encode (blip up/down) were acquired. Total scan time for the diffusion MRI sequence was 8 min.
MRI data were evaluated for gross pathologies by a neuroradiologist, and a T2-weighted and T2 susceptibility-weighted angiography (SWAN) sequence were performed to depict hemorrhagic or other lesions. The 12-month MRI follow-up was performed at a median time of 530 days post-injury (inter-quartil range = 235 days), and there was no major scanner upgrade in the study period.
MRI data were evaluated for gross pathologies by a neuroradiologist, and a T2-weighted and T2 susceptibility-weighted angiography (SWAN) sequence were performed to depict hemorrhagic or other lesions. The 12-month MRI follow-up was performed at a median time of 530 days post-injury (inter-quartil range = 235 days), and there was no major scanner upgrade in the study period.
4
Resting-State fMRI Acquisition Protocol
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Resting-state fMRI data were acquired on a 3-T GE MRI scanner (GE Medical Systems, Erlangen, USA) with an 8-channel GE head coil. High-resolution T1-weighted anatomical images were acquired using the magnetization-prepared rapid gradient echo (MPRAGE) sequence (TR/TE = 2000 ms /1.75 ms; flip angle = 15°; slice thickness = 1.0 mm; FOV = 240 × 240 × 160 mm3; resolution matrix = 256 × 256; voxel size = 0.94 × 0.94 × 1 mm3) for coregistration with the functional images. Using a T2*-weighted gradient-echo-planar imaging sequence, 180 functional volumes were acquired (slice number/TR/TE/flip angle = 40/2000 ms/30 ms/90°, matrix = 64 × 64, FOV = 225 × 225 × 140 mm3, voxel size = 3.52 × 3.52 × 3.5 mm3). Participants were instructed to stay awake with their eyes open and focus on the cross in the middle of the screen for the entire duration of the resting-state scanning, which lasted for a total of 6 min.
5
Brain Imaging Protocol on 3.0T GE Scanner
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During the task in the scanner, brain images were acquired on a 3.0 T GE scanner (General Electric, Milwaukee, WI, USA) with Twin Speed gradients using a GE 8-channel head coil. The scan used a gradient echo-planar imaging sequence. The imaging parameters were indicated as follows: TR = 3000 millisecond (ms), echo time (TE) = 70 ms, flip angle = 90 degrees, field of view (FOV) = 240 × 240 mm2, matrix = 128 × 100, single-shot, and in-plane voxel size = 2 × 2 × 2 mm, slice thickness = 4.0 mm, and gap = 1 mm. Each functional volume contained 27 slices. The slice order was interleaved (odd slices first, even slices afterward).
6
fMRI Protocol for Functional Neuroimaging
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