For this multicenter DTI study, DTI scans were collected at three different sites employing four different scanners constituting as such 4 different samples: (I) the UPC Duffel sample (II), the Amsterdam UMC sample, (III) the Radboud UMC-1 sample, (IV) the Radboud UMC-2 sample. For each sample, a single-shot, diffusion-weighted, echo planar imaging sequence was consistently obtained within the week before a participant’s first ECT session (T0) and within 1 week (T1) after completion of the acute course. Scanners and Acquisition parameters for each site were as followed: (I) A 3 T Siemens Magnetom Prisma MRI scanner (Erlangen, Germany): TE, 71 milliseconds; TR, 8500 milliseconds; image resolution: 2.0 mm isotropic; b value, 1000 s/mm2; 30 directions; 75 axial slices. (II) A General Electrics Sigma HDxt 3 T scanner (General Electric, Milwaukee, WI, USA); TE, 76 milliseconds; TR, 7150 milliseconds; image resolution: 2.4 mm isotropic; b value, 1000 s/mm2; 30 directions; 60 axial slices. (III) A 1.5 T Siemens Avanto system (Erlangen, Germany): TE, 85 milliseconds; TR, 7400 milliseconds; image resolution: 1.6 mm isotropic; b value, 1000 s/mm2; 34 directions; 75 axial slices. (IV) A 3 T Siemens Magnetom Prisma MRI scanner (Erlangen, Germany): TE, 76 milliseconds; TR, 7200 milliseconds; image resolution: 2.0 mm isotropic; b value, 1000 s/mm2; 75 axial slices; 30 directions.
Magnetom prisma mri scanner
Manufactured by Siemens
Sourced in Germany
The MAGNETOM Prisma MRI scanner is a high-performance medical imaging device manufactured by Siemens. It utilizes strong magnetic fields and radio waves to generate detailed images of the body's internal structures. The device's core function is to provide healthcare professionals with advanced diagnostic capabilities through non-invasive imaging technologies.
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15 protocols using magnetom prisma mri scanner
1
Multisite DTI Imaging in ECT Patients
2
fMRI of Neuronal Activation during Occlusion
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A T1-weighted image was acquired using a three-dimensional gradient-echo sequence (MP-RAGE) with an isotropic resolution of 1 mm. The fMRI experiment was performed using a 3-T whole-body scanner (Siemens MRI Scanner MAGNETOM Prisma, Erlangen, Germany) with a 20-channel head array coil. The blood oxygenation level-dependent (BOLD) response in fMRI signals was taken as the surrogate of local neuronal activation following each occlusion event. 32 continuous axial slices (thickness = 4 mm) were acquired by using a gradient echo, echo-planar T2*-sensitive imaging sequence (TR = 2 s, TE = 32 ms; flip angle = 90 degrees; iPAT factor = 2, matrix = 64 × 64; field of view = 220 × 220 mm2).
3
Multimodal fMRI Brain Imaging Protocol
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A T1-weighted image was acquired using a three-dimensional gradient-echo sequence (MP-RAGE) with an isotropic resolution of 1 mm. The fMRI experiment was performed using a 3-T whole-body scanner (Siemens MRI Scanner MAGNETOM Prisma, Erlangen, Germany) with an 8-channel brain array coil. The blood oxygenation level-dependent (BOLD)-based fMRI signal was taken as an indirect measure of local neural activities. At least 32 continuous axial slices (thickness = 3 mm) were acquired by using a gradient echo, echo-planar imaging sequence (TR = 2 s, TE = 30 ms; flip angle = 90 degrees; ASSET = 2, matrix = 64 × 64; field of view = 220 × 220 mm).
4
3T MRI Neuroimaging Protocol for Functional Brain Imaging
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MRI scans were performed on Siemens MRI Scanner MAGNETOM Prisma (3T) with a 64-channel head coil at Hokkaido University. T2*-weighted gradient echo planar imaging was used to acquire a total of 244 volumes per session (axial slices = 32, slice thickness = 3.5 mm with 4.37 mm gap, repetition time (TR) = 2 s, echo time (TE) = 30 ms, flip angle (FA) = 90°, field of view (FOV) = 192 × 192 mm, matrix = 94 × 94). The orientation of the axial slices was parallel to the anterior commissure-posterior commissure line. The first three volumes within each session were discarded to allow for T1 equilibration. T1-weighted anatomical imaging covering the whole brain was acquired after capturing functional images using a T1 MP-RAGE sequence (axial slices = 224, slice thickness = 0.8 mm without gap, TR = 2300 ms, TE = 2.41 ms, FA = 8°, FOV = 256 × 256 mm 2 ).
5
MRI T1-weighted neuroimaging protocol
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Structural T1-weighted MR images were obtained for each participant. We had access to the MRI scans of 19 participants in the NBRC database in neuroimaging informatics technology initiative (NIFTI) format. The data were obtained from an Achieva 3.0 T MRI scanner (Philips) with the following parameters: TR = 8.39 ms; TE = shortest; FOV = 250 × 230.16 × 170 mm; flip angle = 8°; voxel size = 1 mm3; scan duration = 5 min, 28.5 s. The other 23 scans were acquired in a 3 T MAGNETOM Prisma MRI scanner (Siemens). Data were obtained using the following protocol: TR = 2300 ms; TE = 2.33 ms; FOV = 240 mm; voxel size = 0.9 mm3; flip angle = 8°; scan duration = 5 min, 21 s. The raw MR images were saved in the digital imaging and communications in medicine (DICOM) format and converted through MRIcroGL 1.2.20211006 × 86–64 FPC to NIFTI format.
6
Longitudinal Cerebral MRI Protocol for POCD
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Cerebral MRI will be performed at baseline, at 3 months, and 1 year postoperatively on the same day as the neuropsychological assessment. MRI analysis will be carried out by the Division of Neuroradiology at the University Hospital Basel. High-resolution anatomic and diffusion cerebral MRI will be performed using the hospital’s 3-Tesla MAGNETOM Prisma™ MRI scanner (Siemens, Zurich, Switzerland). For MRI analysis, we will assume that the same regions as those described in mild cognitive impairment and Alzheimer’s disease [29 (link)] are relevant to POCD. We will perform a region of interest (ROI) analysis (hippocampus, lateral ventricle, total grey matter volume, regional cortical thickness). Cortical reconstruction and volumetric segmentation will be performed with the FreeSurfer software suite [30 (link)], which is freely available for download online (http://surfer.nmr.mgh.harvard.edu ).
7
Multimodal MRI Acquisition and Preprocessing
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Anatomical and functional MRI scans were collected using a 3 T Philips Achieva MRI Scanner with a 32-channel SENSE head coil at the University of Amsterdam and a 3 T Siemens MAGNETOM Prisma MRI Scanner with a 64-channel head coil at the University of Texas Dallas. To register the functional scans to anatomical space, an anatomical (T1) scan was conducted (TR/TE = 8.3/3.9 ms, FOV = 188 × 240 × 220 mm3, 1 × 1 × 1 mm3, flip angle = 8°). Functional scans were acquired with a T2* single-shot multiband accelerated EPI sequence during the CAAT task (multiband factor = 4, TR/TE = 550/30 ms, FOV = 240 × 240 × 118.5, voxel size = 3 × 3 × 3 mm3, interslice gap = 0.3 mm, flip angle = 55°). Preprocessing was conducted using fMRIprep as implemented in Harmonized AnaLysis of Functional MRI pipeline (HALFpipe version 1.2.2 (Waller et al., 2022 (link)), which included skull-stripping, spatial smoothing, and motion correction of the functional images and registration to the anatomical images [supplementary material s; Esteban et al., 2019 (link)].
8
Osteoporosis Risk Factors in Postmenopausal Women
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The individuals who were eligible for inclusion were postmenopausal women (over 50-year-old) with suspected osteoporosis based on low back pain. This mono-center study was conducted in tertiary care centers in China. All of the patients were recruited by using the consecutive sampling method. From March 2020 to February 2022, we recruited 200 subjects from the population who were undergoing health screening in our hospital. All of the subjects underwent QCT (µCT 780 64-layer scanner, United Imaging, Shanghai, China) and 3.0 T MRI (MAGNETOM Prisma MRI scanner; Siemens Healthcare, Erlangen, Germany) examinations. The inclusion criteria included postmenopausal women over 50 years of age. The exclusion criteria included spinal tumors, histories of spinal trauma and surgery, spinal dysplasia, spinal infectious diseases, previous hormone therapy, hematologic disorders, and intermediate-to-advanced malignancies. We investigated three possible increases in the risk of osteoporosis in postmenopausal women, including physical activity status, smoking, and alcohol consumption. The International Physical Activity Questionnaire—Short Form was used to assess the physical activity status of all of the subjects. Based on their physical activity level, patients were divided into sedentary, minimally active, and very active groups. Finally, 155 female subjects were enrolled in this study.
9
Resting-State fMRI Acquisition Protocol
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Scanning was performed on a 3 T Siemens Magnetom Prisma MRI Scanner (Siemens Healthcare, Germany). Details of the procedure can be found in Table 1 .
Rs-fMRI runs lasted 10 min. Subjects were instructed to keep still and maintain fixation on a white cross presented at the center of the screen. Data were acquired with a T2* weighted multiband and multi-echo (ME) sequence: TR = 1500 ms, TE1 = 16.4 ms, TE2 = 37.59 ms, TE3 = 58.78 ms, voxel size = 2.5 mm3. We collected 1 runs of rs-fMRI (400 TRs) for each subject. An anatomical MRI was also obtained (see Table1 ).
Rs-fMRI runs lasted 10 min. Subjects were instructed to keep still and maintain fixation on a white cross presented at the center of the screen. Data were acquired with a T2* weighted multiband and multi-echo (ME) sequence: TR = 1500 ms, TE1 = 16.4 ms, TE2 = 37.59 ms, TE3 = 58.78 ms, voxel size = 2.5 mm3. We collected 1 runs of rs-fMRI (400 TRs) for each subject. An anatomical MRI was also obtained (see Table
10
Awake Macaque Resting-State fMRI
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Three rhesus monkeys (Macaca mulatta) were included in the study (two females: monkeys C, 21 years old, and N, 9.5 years old; one male: monkey L, 9.5 years old; weight, 5 to 8 kg). Animals were maintained on a water and food regulation schedule, individually tailored to maintain a stable level of performance for each monkey. All procedures follow the guidelines of European Community on animal care (European Community Council, directive no. 86-609, 24 November 1986) and were approved by French Animal Experimentation Ethics Committee no. 42 (CELYNE). Scanning was performed on a 3T Siemens Magnetom Prisma MRI Scanner (Siemens Healthcare, Germany). All detailed information about awake monkey training, surgery, and experimental rs-fMRI setup can be found in (80 (link)). The rs-fMRI acquisition parameters were the following: TR = 1800 ms, TE = 27 ms, flip angle = 75°, field of view (FOV) = 480 mm by 336 mm, voxel size = 1.8 mm isotropic, and 30 slices. For each macaque, 12 runs of 400 volumes were acquired.
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