The functional imaging data was originally acquired in a GE 3 T Sigma scanner (General Electric, Waukesha, WI, USA) with a standard GE birdcage-type RF coil using a standard T2*-weighted EPI sequence. The EPI parameters were: TR = 2 s TE = 60 ms, FOV = 24 × 24 cm, Matrix = 64 × 64, flip angle = 60°, 22 axial slices (5 mm thick/1.2 mm sp, from superior to inferior). The spatial resolution for the functional images was 3.75 × 3.75 × 6.2 mm. High-resolution anatomical images were also obtained using the standard T1-weighted sequence (66 axial slices, 2.0 mm thick/interleaved, FOV = 24 × 24 cm, Matrix = 256 × 256).
3 t sigma scanner
Manufactured by GE Healthcare
Sourced in United States
The 3 T Sigma scanner is a magnetic resonance imaging (MRI) system developed by GE Healthcare. It operates at a magnetic field strength of 3 Tesla, which allows for high-resolution imaging and improved diagnostic capabilities. The core function of the 3 T Sigma scanner is to generate detailed images of the body's internal structures using powerful magnetic fields and radio waves.
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Lab products found in correlation
2 protocols using 3 t sigma scanner
1
Functional Imaging Acquisition Protocol
2
Neuroimaging Protocol for 3T BOLD fMRI
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MRI scanning was carried out on a research-dedicated GE 3T Sigma scanner, using a 32-channel head coil, at the Functional Magnetic Imaging Core Facility at NIH. Functional scans were acquired using T2*-weighted, gradient recalled echo-planar imaging to measure BOLD changes in image intensity [95 (link)]. Functional imaging was conducted with 22 slices oriented perpendicular to the calcarine sulcus and positioned with the most posterior slice at the occipital pole, covering all occipital and posterior parietal and temporal cortex (TR: 1,500 ms; multi-echo TEs: 14.2, 30.1, and 46 ms; FA: 75°; voxel size: 3 × 3 × 3 mm; grid size: 64 × 64 voxels). For each participant and in each session, a high-resolution T1-wieghted anatomy of the entire brain was acquired (magnetization-prepared rapid-acquisition gradient echo [MPRAGE]; TR: 2,500 ms; TE: 3.48 ms; FA: 7°; voxel size: 1 × 1 × 1 mm; grid size: 256 × 256 voxels; 172 slices). The anatomical volume was used for co-registration across scanning sessions and for gray matter segmentation and cortical flattening.
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