Research MRI was acquired on a 3T MR750 MR scanner (GE Healthcare, Little Chalfont, Buckinghamshire, United Kingdom), within 30–95 days of stroke (M = 69.7, SD = 17.4). T1-weighted imaging was performed with the magnetization-prepared rapid acquisition gradient echo (MPRAGE) sequence.18 (link) Diffusion-weighted images were acquired with an echo-planar imaging (EPI) sequence using 60 diffusion-sensitization directions at b = 1500 s/mm2 and six acquisitions without diffusion sensitization (b = 0). T2-weighted fluid-attenuated inversion recovery (FLAIR) and fast recovery fast spin echo (FRFSE) sequences were acquired for lesion delineation. Detailed acquisition parameters for these structural sequences have been published previously.19 (link) Rs-fMRI was acquired with an echo-planar imaging sequence using the following parameters: TR = 2000 ms, TE = 30 ms, flip angle = 75°, slice thickness = 3 mm and gap = 0.3 mm. Images were acquired in the axial plane with FOV = 211 × 211 mm2, matrix size = 64 × 64 mm2 and number of slices = 40. A total of 180 volumes were collected over a scan time of 7 min. Participants were instructed to keep their gaze on a fixation cross throughout the scan.
3t mr750 mr scanner
Manufactured by GE Healthcare
Sourced in United Kingdom
The 3T MR750 MR scanner is a magnetic resonance imaging (MRI) system manufactured by GE Healthcare. It operates at a field strength of 3 Tesla, providing high-resolution imaging capabilities. The scanner's core function is to generate detailed images of the human body using magnetic fields and radio waves, enabling healthcare professionals to diagnose and monitor various medical conditions.
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3 protocols using 3t mr750 mr scanner
1
Multimodal MRI Acquisition for Stroke Evaluation
2
MRI and Diffusion-Weighted Imaging Protocol
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MRI scans were collected on a 3T MR750 MR scanner (GE Healthcare, Little Chalfont, Buckinghamshire, UK). T1-weighted images were acquired with the MPRAGE sequence 26 and diffusion-weighted images with an echo planar imaging sequence with double refocused spin echo for 60 diffusion-sensitization directions at b=1500s/mm 2 and six acquisitions without diffusion sensitization (b=0).
3
Multimodal MRI Stroke Assessment
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Research MRI was performed 30-95 days after stroke (M = 69.7, SD = 17.4) on a 3T MR750 MR scanner (GE Healthcare, Little Chalfont, Buckinghamshire, UK). T1-weighted images were acquired with the MPRAGE sequence 18 x 64mm and number of slices = 40. A total of 180 volumes were collected over a scan time of 7min. Participants were instructed to keep their gaze on a fixation cross throughout the scan. Diffusion-weighted images were acquired with an echo-planar imaging sequence with double refocused spin echo for 60 diffusion-sensitization directions at b=1500s/mm 2 and six acquisitions without diffusion sensitization (b=0). Image geometry for the diffusion-weighted images covered the whole brain using 2mm axial slices with matrix size of 128 x 128 voxels and FOV of 256 x 256mm, resulting in 2mm isotropic resolution. Slices were aligned such that the intercommissural line was as close to the axial plane as possible. Acquisition was peripherally gated to the cardiac cycle, giving a sequence duration of 11-20min, a TR of 10,000-14,118ms and a TE of 66-78ms with a flip angle of 90°.
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