Imaging data was collected using a Siemens 3T Allegra MRI (Erlangen, Germany) running VA19 software and using a spin-echo, EPI sequence with a spatial resolution of 1.7×1.7×4.0 mm. The sequence parameters were: TE/TR=87/5000 ms, FOV=200 mm, axial slice orientation with 35 slices and no gaps, twelve isotropically distributed diffusion weighted directions, and two diffusion weighting values (b=0 and 1000 s/mm2). The entire protocol was repeated five times to improve signal-to-noise ratio. Head movement was minimized with restraining padding and an individually fitted bite-bar. DTI data from this cohort has been used in a prior study of accelerated aging (Kochunov, et al. 2012a (link)). We re-examined the mega-analysis results with and without this cohort and global and regional age-by-diagnosis interactions remained consistent.
3t allegra mri
Manufactured by Siemens
Sourced in Germany
The 3T Allegra MRI is a magnetic resonance imaging (MRI) system developed by Siemens. It operates at a field strength of 3 Tesla, which provides high-quality images for medical diagnostic purposes. The core function of the 3T Allegra MRI is to generate detailed and accurate images of the body's internal structures using strong magnetic fields and radio waves.
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Lab products found in correlation
3 protocols using 3t allegra mri
1
Diffusion Tensor Imaging Protocol for Aging Study
2
Pediatric fMRI Imaging Protocol
3
Structural and Functional MRI of Children
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Children were scanned on a 3T Allegra MRI (Siemens, Erlangen, Germany) at the Cape Universities Brain Imaging Centre (CUBIC) in Cape Town, South Africa, according to protocols approved by the Faculty of Health Sciences Human Research Ethics Committees of both the Universities of Cape Town and Stellenbosch. All parents and guardians provided written informed consent and all children provided oral assent.
T1-weighted structural images were acquired in the sagittal plane using a motion navigated (Tisdall et al., 2009 ) multi echo magnetization prepared rapid gradient echo (MEMPRAGE) sequence (van der Kouwe et al., 2008 (link)) with TR 2,530 ms, TEs 1.53/3.19/4.86/6.53 ms, inversion time (TI) 1,160 ms, flip angle 7°, resolution 1.3 × 1 × 1 mm3, and field of view (FOV) 224 × 224 × 144 mm3. RS-fMRI data were acquired using an interleaved multi-slice 2D gradient echo, echo planar imaging (EPI) sequence: 33 interleaved slices, slice thickness 4 mm, slice gap 1 mm, voxel size 3.44 × 3.44 × 5 mm3, FOV 220 × 220 × 164 mm3, TR/TE 2,000/30 ms, flip angle 77°, 180 volumes.
T1-weighted structural images were acquired in the sagittal plane using a motion navigated (Tisdall et al., 2009 ) multi echo magnetization prepared rapid gradient echo (MEMPRAGE) sequence (van der Kouwe et al., 2008 (link)) with TR 2,530 ms, TEs 1.53/3.19/4.86/6.53 ms, inversion time (TI) 1,160 ms, flip angle 7°, resolution 1.3 × 1 × 1 mm3, and field of view (FOV) 224 × 224 × 144 mm3. RS-fMRI data were acquired using an interleaved multi-slice 2D gradient echo, echo planar imaging (EPI) sequence: 33 interleaved slices, slice thickness 4 mm, slice gap 1 mm, voxel size 3.44 × 3.44 × 5 mm3, FOV 220 × 220 × 164 mm3, TR/TE 2,000/30 ms, flip angle 77°, 180 volumes.
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