Whole brain functional and anatomical images were acquired using a 3.0 T Magnetom TrioTim MRI scanner (Siemens, Erlangen, Germany) with a 12-channel head coil. A high-resolution 3D T1-weighted dataset was acquired for each subject (176 sagittal sections, 1 × 1 × 1 mm³; 256 × 256 data acquisition matrix). Functional images were acquired using a T2*-weighted, gradient-echo planar imaging pulse sequence recording 37 sections oriented parallel to the anterior and posterior commissure at an in-plane resolution of 3 × 3 × 3mm³ (interslice gap = 0; TE = 30 ms; TR = 2 s; FA = 90°; FoV = 192 × 192 mm2; 64 × 64 data acquisition matrix). For each experimental run 285 whole brain volumes were recorded.
3.0 t magnetom triotim
Manufactured by Siemens
Sourced in Germany
The 3.0 T Magnetom TrioTim is a magnetic resonance imaging (MRI) system developed by Siemens. It operates at a magnetic field strength of 3.0 Tesla, which allows for high-quality imaging and data acquisition. The core function of this system is to generate detailed images of the human body, including organs, tissues, and structures, for diagnostic and research purposes.
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4 protocols using 3.0 t magnetom triotim
1
Multimodal Brain Imaging Protocol
2
Multimodal Brain Imaging Protocol
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Whole-brain functional and anatomical images were acquired using a 3.0 T Magnetom TrioTim MRI scanner (Siemens, Erlangen, Germany) and a 12-channel head coil. A high-resolution 3D T1-weighted dataset was recorded for each participant (176 sagittal sections, 1 mm × 1 mm × 1 mm; 256 matrix × 256 matrix). Functional images were acquired using a T2∗- weighted, gradient-echo echo planar imaging (EPI) pulse sequence recording 37 axial slices (no gap) for whole brain coverage at an in-plane resolution of 3 mm × 3 mm × 3 mm (TE = 30 ms; TR = 2 s; FA = 70°; FoV = 192 mm × 192 mm; 64 matrix × 64 matrix). A total of 290 whole-brain volumes were recorded for each of five experimental runs of ∼10 min each.
3
CT and MRI Scans for Liver Evaluation
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Fifteen patients underwent CT plain scan and enhancement, two patients underwent CT enhancement directly, one patient underwent both CT and MRI plain scan and enhancement, and one patient underwent CT plain scan and MRI plain scan plus enhancement. The CT scan used was the Somatom Definition AS+ model. In enhanced scanning, non-ionic contrast agent iohexol (300 mg/ml) 100~125 ml was used, with a flow rate of 3.0~3.5 ml/s through the ulnar vein bolus injection, 25~30 s after the injection of contrast agent, and finally acquired arterial and venous phase. MRI scan were performed using a Siemens 3.0 T Magnetom Trio Tim magnetic resonance system and 16-channel skull coil. Enhanced scanning through ulnar vein injection of Magnevist solution at a dose of 0.3 mmol/kg, with a rate of 2.0 to 3.0 ml/s. Arterial phase (20~30 s), venous phase (60 s), delayed phase (120~180 s), and after-delayed phase (200 s) scanning were also acquired.
4
Resting-State fMRI Acquisition Protocol
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Images were acquired on a Siemens 3.0T MAGNETOM TrioTim syngo MRI scanner at the Free University of Berlin. A 3D anatomical image was first acquired using a fast SPGR sequence (TR = 1.9 ms, TE = 2.25 ms, FOV = 256 mm × 256 mm, matrix = 256 × 256, slice thickness = 1 mm) for functional image registration and localization. After that, EC/EO sequences were obtained from each participant; the order of EC/EO runs was counterbalanced across participants.
During both scans, participants were instructed to avoid head movement and to avoid thinking about specific events or concerns, or at least avoid dwelling on any particular thing. In other words, let their minds wander [17 (link)]. Participants were also instructed to remain awake; subsequently, they were asked as to whether they had fallen asleep. During the EO run, participants were asked to keep their eyes open and fixate on a white cross displayed on a black background on the in-scanner screen. During the EC run, participants were instructed to close their eyes. All participants reported that they had remained awake throughout the scanning session.
Blood oxygen-level dependent (BOLD) images were acquired using an EPI sequence (TR = 2 s, TE = 30 ms, flip angle = 90°, FOV = 192 mm × 192 mm, matrix = 64 × 64, slice thickness = 3 mm, gap = 0 mm, 37 slices) and 205 volumes were acquired in each run (7 min).
During both scans, participants were instructed to avoid head movement and to avoid thinking about specific events or concerns, or at least avoid dwelling on any particular thing. In other words, let their minds wander [17 (link)]. Participants were also instructed to remain awake; subsequently, they were asked as to whether they had fallen asleep. During the EO run, participants were asked to keep their eyes open and fixate on a white cross displayed on a black background on the in-scanner screen. During the EC run, participants were instructed to close their eyes. All participants reported that they had remained awake throughout the scanning session.
Blood oxygen-level dependent (BOLD) images were acquired using an EPI sequence (TR = 2 s, TE = 30 ms, flip angle = 90°, FOV = 192 mm × 192 mm, matrix = 64 × 64, slice thickness = 3 mm, gap = 0 mm, 37 slices) and 205 volumes were acquired in each run (7 min).
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