MRI studies were performed on a Siemens Magnetom Sonata [Maestro Class] 1.5 T Scanner (Siemens AG, Erlangen, Germany). All data were acquired using an 8-channel array head coil for reception and the body coil for transmission. In order to obtain a high-resolution anatomical image of each subject's brain, a sagittal T1-weighted 3D–MPRAGE sequence was used (TR/TI/TE = 1300/660/3.19 ms, flip angle 15°, field of view = 256 ∗ 256 mm2, matrix = 256 ∗ 256, 176 slices, voxel size = 1 ∗ 1 ∗ 1 mm3). Additionally, a field map was recorded for distortion correction of the functional images caused by magnetic field inhomogeneity. For the fMRI task, 175 gradient-echo planar T2*-weighted images covering the whole brain were acquired (TR = 4000 ms, TE = 64 ms, field of view = 192 ∗ 192 mm2, matrix = 64 ∗ 64, voxel size = 3 ∗ 3 ∗ 3 mm3, gap = 0.3 mm, 38 interleaved slices). The first two images of each experimental run were discarded in order to reach equilibrium of magnetization.
Magnetom sonata maestro class 1.5 t scanner
Manufactured by Siemens
Sourced in Germany
The Magnetom Sonata [Maestro Class] 1.5 T Scanner is a magnetic resonance imaging (MRI) system developed by Siemens. It is designed to provide high-quality imaging capabilities for a variety of medical applications. The system utilizes a 1.5 Tesla (T) superconducting magnet to generate the magnetic field necessary for MRI scanning. This specific model is part of Siemens' Maestro Class line of MRI scanners.
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2 protocols using magnetom sonata maestro class 1.5 t scanner
1
MRI Brain Imaging Protocol for fMRI Studies
2
High-Resolution Hippocampal fMRI Acquisition
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MRI data were acquired using a Siemens Magnetom Sonata [Maestro Class] 1.5 T Scanner (Siemens AG) with an 8‐channel array head coil for reception and the body coil for transmission. A sagittal T1‐weighted 3D‐MPRAGE sequence was used to obtain a high‐resolution anatomical image of each subject's brain (TR/TI/TE = 1300/660/3.19 ms, flip angle 15°, field‐of‐view = 256 × 256 mm2, matrix 256 × 256, 176 slices, voxel size 1 × 1 × 1 mm3). Additionally, a field map was recorded for distortion correction of the functional images caused by magnetic field inhomogeneity. For the MRI task, 175 gradient‐echo planar T2*‐weighted images covering the whole brain were acquired (TR = 4000 ms, TE = 64 ms, field‐of‐view 192 × 192 mm2, matrix 64 × 64, voxel size 3 × 3 × 3 mm3, gap = 0.3 mm, 38 interleaved slices). The first two images of each experimental run were discarded in order to reach equilibrium of magnetization. These parameters were chosen based on a previous study, in which we demonstrated that for functional activations within the hippocampus, acquisition at a TE = 64 ms results in a higher sensitivity of BOLD signal detection within the hippocampus than at a TE = 45 ms.
22 (link) To achieve this long TE and a full brain coverage with 38 slices a TR = 4 seconds was necessary.
22 (link) To achieve this long TE and a full brain coverage with 38 slices a TR = 4 seconds was necessary.
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