All subjects were scanned in the same scanner at Duke University Hospital, using a GE 3T Discovery 750 MRI (General Electric, Milwaukee, WI, USA) with an 8-channel head coil. Diffusion-weighted images (DWIs) were collected using an oblique single-shot spin-echo echo-planar imaging (EPI) sequence with a repetition time (TR) = 9000 ms, echo time (TE) = 93 ms, having a 256 × 256 image matrix over a 25.0 cm2 FOV, covering 69 interleaved axial slices, each 2 mm thick. Twenty-five diffusion directions were uniformly distributed in 3D space with a b = 1000 s/mm2, together with an acquisition with b = 0 s/mm2. A T2 and proton-density-weighted sequence (FRFSE-XL) with a TR = 3000 ms, TE = 90 ms, 256 × 256 matrix, 24.0 cm2 FOV and 5 mm slice thickness was used to acquire 28 interleaved axial slices.
Ge 3t discovery 750 mri
Manufactured by GE Healthcare
Sourced in United States
The GE 3T Discovery 750 MRI is a magnetic resonance imaging (MRI) system that operates at a magnetic field strength of 3 Tesla. It is designed to produce high-quality images of the human body for diagnostic and research purposes.
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3 protocols using ge 3t discovery 750 mri
1
Diffusion-Weighted Imaging of the Brain
2
Cortical Thickness Evaluation in MRI Neuroimaging
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All subjects were scanned, using a GE 3 T Discovery 750 MRI (General Electric, Milwaukee, WI) with a 32-channel phased array head coil (MR Instruments, Inc., Minnetonka, MN). Anatomical T1-weighted brain images were collected with a 3D BRAVO sequence, with an inversion time (TI) = 450 ms, repetition time (TR) = 6.7 ms, echo time (TE) = 2.5 ms, flip angle = 12°, reconstructed image size = 512 × 512 × 312, and resolution = 0.47 × 0.47 × 0.6 mm3. The FreeSurfer software package, version 5.3.0 (64-bit LINUX), was used to calculate the cortical thickness for this study (Fischl, 2012 (link); Fischl and Dale, 2000 (link); Dale et al., 1999 (link)). The T1-weighted anatomical images were resampled to 1 × 1 × 1 mm3, spatially normalized, intensity normalized, skull stripped, anatomically segmented, tessellated, surface smoothed, and spherically inflated for hemispherical registration. Spatial localizations were determined via the Desikan-Killiany atlas (Desikan et al., 2006 (link)).
Microbleeds and contusions were counted manually by radiologists analogously with Riedy et al. (2015) (link).
For each subject, a whole brain cortical thickness value was averaged from the MeanThickness values in the lh.aparc.stats and rh.aparc.stats files, resulting from FreeSurfer.
Microbleeds and contusions were counted manually by radiologists analogously with Riedy et al. (2015) (link).
For each subject, a whole brain cortical thickness value was averaged from the MeanThickness values in the lh.aparc.stats and rh.aparc.stats files, resulting from FreeSurfer.
3
MRI Acquisition Protocol for Functional Imaging
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All participants were scanned in the same scanner at Duke University Hospital, using a GE 3T Discovery 750 MRI (General Electric, Milwaukee, WI, USA) with an eight-channel head coil. Anatomical T1-weighted images were acquired, using a FSPGR sequence, with an echo time (TE) = 2.9 ms, repetition time (TR) = 7.6 ms, inversion time (TI) = 450 ms, flip angle of 12°, with an reconstructed image size of 256 × 256 × 162 and a voxel size = 1.0 × 1.0 × 1.0 mm3. The functional imaging sequence was an interleaved T2* weighted echoplanar (EPI) sequence with 34 axial slices that were 4 mm thick, with a flip angle = 90°, TE = 30 ms, and a 64 × 64 in-plane matrix with a 24 cm field of view. A total of 155 time points were acquired per participant with a TR of 2000 ms.
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