Structural and rs-fMRI of the brain was acquired in a single session, preceded by administration of the Brief Pain Inventory in all cases.27 MRI imaging was performed on a single Siemens Verio 3 tesla system (Erlangen, Germany). A 12-channel phased array head coil (Siemens) was used. For each participant structural imaging was acquired as follows, field of view 256 × 256 × 160 mm and isotropic 1mm3 voxels: T1-weighted (Magnetization-prepared rapid gradient-echo, flip angle 9 degrees, TR 2300 ms, TE 2.98 ms, TI 900 ms); T2-weighted (TR 3200 ms, TE 416 ms) and FLAIR (Fluid-Attenuated Inversion Recovery, TR 5000 ms, TE 402 ms, TI 1800 ms). Phase and magnitude field maps (Siemens) were then acquired before resting state echo-planar images (TR 3000 ms, TE 30 ms, flip angle = 90 degrees, 46 slices, field of view 192 mm, 3 mm slice thickness, duration 5 min 23 s, 107 volumes). Pain severity due to multiple sclerosis (Numerical Rating Scale ranging from 0–10) was recorded immediately prior to rs-fMRI acquisition.
Verio 3 tesla system
Manufactured by Siemens
Sourced in Germany
The Verio 3 tesla system is a magnetic resonance imaging (MRI) scanner manufactured by Siemens. It is designed to acquire high-resolution images of the human body. The system operates at a magnetic field strength of 3 tesla, which enables it to capture detailed anatomical information.
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3 protocols using verio 3 tesla system
1
Multimodal Neuroimaging of Multiple Sclerosis Pain
2
Multimodal Brain Imaging Protocol
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All scans were performed on a 3T MRI scanner (Siemens Verio 3-tesla system; Erlangen, Germany) with an 8-channel SENSE head coil. For each subject, a non-diffusion-weighted image (b0) with two averaging and DWIs were acquired using a single-shot echo-planar-imaging sequence with b-values = 1000 s/mm2 along 59 gradient directions with the following parameters: TR/TE = 6300/95 ms, field of view = 230 mm2 × 230 mm2, reconstruction resolution = 1.8 mm2 x 1.8 mm2, slice thickness = 3 mm (no gap), and SENSE factor = 2. For anatomical reference, T1-weighted (T1w) images were acquired using a 3D-MPRAGE sequence with the following parameters: TR/TE/TI = 1900/2.45/900 ms, nominal/reconstruction resolution = 1 mm3 x 1 mm3 x 1 mm3, 176 slices in the sagittal plane, and field of view = 256 mm2 x 256 mm2.
3
High-Resolution MRI Visualization of Locus Coeruleus
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MRI measurements were performed on a Siemens Verio 3 Tesla system with a Siemens 32-channel phased-array head coil for reception. In order to visualise the LC, high-resolution T1-weighted Fast-Low-Angle-Shot (FLASH) images were acquired using the following parameters: 0.75 x 0.75 x 0.75 mm 3 voxel size, 320 x 320 x 192 matrix, 5.56 ms echo time, 20 ms repetition time, 23° flip angle, 130 Hz/pixel bandwidth, 7/8 partial Fourier, and 13:50 min scan duration. The axial 3D block was oriented parallel to the floor of the 4 th ventricle.
T1-weighted MPRAGE anatomical images were also acquired in the same scanning session using the following acquisition parameters: 1 x 1 x 1 mm 3 voxel size, 256 x 256 x 192 matrix, 4.37 ms echo time, 2500 ms repetition time, 1100 ms inversion time, 7° flip angle, 140 Hz/pixel bandwidth, 7/8 partial Fourier, GRAPPA factor of 2 and 5:08 min scan duration.
A thin pillow was placed on the base of the coil surrounding the sides and the back of the head to guarantee an optimal balance between tight fixation and patient comfort as well as to minimise motion.
T1-weighted MPRAGE anatomical images were also acquired in the same scanning session using the following acquisition parameters: 1 x 1 x 1 mm 3 voxel size, 256 x 256 x 192 matrix, 4.37 ms echo time, 2500 ms repetition time, 1100 ms inversion time, 7° flip angle, 140 Hz/pixel bandwidth, 7/8 partial Fourier, GRAPPA factor of 2 and 5:08 min scan duration.
A thin pillow was placed on the base of the coil surrounding the sides and the back of the head to guarantee an optimal balance between tight fixation and patient comfort as well as to minimise motion.
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