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Avanto mri scanner

Manufactured by Siemens
Sourced in Germany

The Avanto MRI scanner is a magnetic resonance imaging (MRI) system designed by Siemens. It is a high-field MRI system that uses a powerful superconducting magnet to generate detailed images of the body's internal structures. The Avanto MRI scanner is capable of performing a wide range of diagnostic imaging procedures, including brain, spine, and body scans.

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30 protocols using avanto mri scanner

1

Standardized 1.5T MRI Protocol

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All MRI data used in this study were collected with 1.5 T Siemens Avanto MRI scanners. The acquisition protocol was consistent across the five participating sites, including the MinT and ASRB projects, which were conducted concurrently. The T1-weighted magnetisation-prepared rapid-acquisition gradient echo sequence used by all five sites employed the following parameters: a repetition time of 1980 ms, an echo time of 4.3 ms, a voxel size of 0.9765625 x 0.9765625 × 1mm3, and a flip angle of 15º.
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2

Multisite Brain Imaging Protocol

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Structural and diffusion-weighted MRI of brain anatomy were acquired using Siemens Avanto MRI scanners located in Melbourne, Sydney, Brisbane, Perth and Newcastle. The same acquisition sequence was used at all sites. Structural T1-weighted images were acquired using an optimized MP-RAGE sequence (voxel resolution: 1 mm3 isotropic, TR: 1980 ms, TE: 4.3 ms). Diffusion-weighted images for 64 non-collinear gradient directions were acquired using spin-echo echo-planar imaging (b value: 1000 s/mm2, voxel resolution: 2.4 mm3 isotropic, TR: 8400 ms, TE: 88 ms). Participants showing gross artifacts, cerebellar cropping and/or significant head motion were excluded, following protocols established as part of a prior study in this cohort [11 (link)].
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3

3D T1-Weighted MRI Brain Imaging

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Participants were scanned at the Birkbeck-UCL Centre for Neuroimaging using a 1.5 Tesla Siemens Avanto MRI scanner with a 32-channel head coil. A high-resolution, 3D T1-weighted structural scan was acquired using a magnetization prepared rapid gradient echo (MPRAGE) sequence. Imaging parameters were: 176 slices; slice thickness = 1 mm; gap between slices = 0.5 mm; TR = 2730 ms; TE = 3.57 ms; field of view = 256 mm x 256mm2; matrix size = 256 × 256; voxel size = 1 × 1 × 1 mm resolution). The scanning time was 5.5 min.
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4

High-Resolution Structural Brain Imaging

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Participants were scanned with a 1.5 T Siemens (Siemens Medical Systems, Munich, Germany) Avanto MRI scanner with a 32-channel head coil. A high-resolution, three-dimensional T1-weighted structural scan was acquired with a magnetization prepared rapid gradient echo sequence. Imaging parameters were: 176 slices; slice thickness = 1 mm; gap between slices = .5 mm; echo time = 2730 ms; repetition time = 3.57 ms; field of view = 256 mm × 256 mm2; matrix size = 256 × 256; voxel size = 1 × 1 × 1 mm resolution. The scanning time was 5.5 min. Foam padding was used against the sides and the back of the head of the participant, to minimize head motion. Ear buds attenuated scanner noise.
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5

Longitudinal Functional Brain Plasticity After Childhood Maltreatment

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Data across both time points were acquired on the same 1.5 tesla Siemens (Siemens Medical Systems, Erlangen, Germany) Avanto MRI scanner with a 32-channel head coil during two runs of approximately 9 minutes each. All data analyses were conducted using the software package SPM12 (www.fil.ion.ucl.ac.uk/spm/software/) implemented in Matlab 2018. Crosssectional analyses for baseline and follow-up data were carried out using a repeated measures Flexible Factorial Design, while longitudinal data were analysed to test for (group differences in) linear patterns of activation in response to basic and valenced ABM recall with age using the Sandwich Estimator Toolbox for Longitudinal and Repeated Measures Data v2.1.0 (SwE, toolbox for SPM, Guillaume et al., 2014) . Precise details of data acquisition parameters can be found in the supporting information.
Functional brain plasticity following childhood maltreatment 11 2.5 Analyses
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6

Neuroimaging Protocol for Brain Scanning

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Participants were scanned at the Birkbeck-UCL Centre for Neuroimaging using a 1.5-T Siemens (Siemens Medical Systems, Erlangen, Germany) Avanto MRI scanner, with a 32-channel head coil. Functional scans were acquired using a gradient-echo EPI sequence (repetition time = 3000 msec, echo time = 48 msec, field of view = 205 × 205, matrix = 64 × 64). In each volume, thirty-six 3.2-mmthick oblique axial slices were acquired. Anterior-toposterior phase encoding and a tilt were applied to the sequence to improve signal in OFC and amygdala. After this, a high-resolution T1 structural scan was acquired (magnetization prepared rapid gradient echo, 176 slices, 1 × 1 × 1 mm resolution). Foam padding was used to minimize head motions, and ear plugs were used to dampen the noise of the scanner. Stimuli were projected centrally onto a screen at the front of the magnet, which participants viewed using a mirror mounted on the head coil (visual angle of the whole screen = 21°× 13°).
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7

High-Resolution Brain Imaging with 1.5T MRI

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All data were acquired on a 1.5 tesla Siemens (Siemens Medical Systems, Erlangen, Germany) Avanto MRI scanner with a 32-channel head coil during two runs of approximately 9 min each. During each run, a total of 181 T2*-weighted echo-planar (EPI) volumes were acquired, covering the whole brain with the following acquisition parameters: slice thickness: 2 mm; repetition time (TR) = 85 ms; echo time (TE) = 50 ms; field of view (FOV) = 192 mm × 192 mm2; 35 slices per volume, gap between slices: 1 mm; flip angle: 90°). A high-resolution, three-dimensional T1-weighted structural scan was acquired with a magnetisation-prepared rapid gradient echo sequence. Imaging parameters were: 176 slices; slice thickness: 1 mm; gap between slices: 0.5 mm; TE = 2730 ms; TR = 3.57 ms; FOV = 256 mm × 256 mm2; matrix size: 256 × 256; voxel size: 1 × 1 × 1 mm resolution.
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8

Cardiac MRI Imaging Protocol

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All investigations were performed at the magnetic resonance premises of a specialized imaging centre (IZD Inc., Trnava, Slovakia) equiped with CMR 1.5 T Avanto MRI scanner by Siemens, Germany. Investigations were supervised by a trained radiologist and individually evaluated by a radiologist with CMR specialization.
After data acquisition, the protocol for LV function evaluation and myocardial infarction scar detection was applied as follows:
1. Morphological sequences to distinguish pathological infi ltrates in the myocardium (adipose deposits and other), 2. Multi-segmental sequences (for evaluation of regional and global LV functions), 3. Myocardium perfusion (rest/rest), 4. Aortic and pulmonary artery fl ow, 5. Ischemic and non-ischemic LV myocardial scar detection in 2D and 3D IR sequences. Volumetric data were obtained in 2-chamber view by standard steady-state /TRUFI/ sequences. The scans were 6 mm thick and covered the entire left ventricle from base to apex (Fig. 7). The used settings were as follows: PAT factor 2, FOV 340x340 mm, matrix 256x256, fl ip angle 80`, TR 36 mm, TE 1.2 ms. Gadobutrol, an extracellular macrocyclic non-ionic gadolinium contrast agent, was administered to all patients (Gadovist 1 mmol/ml/ manufactured by Bayer AG, Germany).
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9

MRI Neuroimaging Protocol: T1 and T2-weighted

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All participants were scanned on a 1.5T Avanto MRI scanner (Siemens, Erlangen, Germany). Three‐dimensional data sets were acquired, using a T1‐weighted 3D‐FLASH sequence (TR = 11 msec, TE = 4.94 msec, FOV = 256 × 256 mm2, flip angle = 15°, voxel size = 1 × 1 × 1 mm3) and T2‐weighted FLAIR sequence (TR = 6000 msec, TE = 353 msec, TI = 2200 msec, FOV = 256 × 256 mm2, flip angle = 15°, voxel size = 1 × 1 × 1 mm3).
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10

MRI Scan Motion Artifact Assessment

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All participants were scanned on a 1.5T Avanto MRI scanner (Siemens, Elangen, Germany). Three-dimensional data sets were acquired using a T1-weighted 3D-FLASH sequence (TR = 11 ms, TE = 4.94 ms, FOV = 256 × 256 mm, flip angle = 15°, voxel size = 1 × 1 × 1 mm3) and T2-weighted FLAIR sequence (TR = 6000 ms, TE = 353 ms, TI = 2200 ms, FOV = 256 × 256 mm, flip angle = 15°, voxel size = 1 × 1 × 1 mm3). Anonymised FLAIR and T1 volumetric scans were rated from one to five according to severity of motion artefact. The following classification system was used: 1) no visible motion artefacts, 2) subtle artefacts visible, 3) mild ringing artefacts, 4) severe ringing artefacts and 5) adjacent gyri indistinguishable due to motion.
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