Whole brain functional magnetic resonance images were obtained using a 3 T MR imaging system (Siemens Prisma, Erlangen, Germany) and a 20-channel phased-array radio frequency head coil. After high order shimming of the magnetic field, functional whole-brain volumes were acquired using a T2*-weighted echo-planar imaging (EPI) sequence [TR = 2500 ms; TE = 30 ms; flip angle = 83°; FoV = 192 mm; 41 slices; matrix size = 64 × 64; and voxel size = 3 × 3 × 2]. The first four functional time points of each run were discarded to allow a steady state magnetization before the task trials began. In addition, for anatomical reference a high-resolution T1-weighted image was acquired using the following sequence: TR = 1900.0 ms; TE = 3.42 ms; flip angle = 9°; FoV = 256 mm; matrix size = 256 × 256; and voxel size = 1 × 1 × 1.
20 channel phased array radio frequency head coil
Manufactured by Siemens
Sourced in Germany
The 20-channel phased-array radio frequency head coil is a laboratory equipment designed for magnetic resonance imaging (MRI) applications. It is responsible for transmitting and receiving radio frequency (RF) signals in the MRI system, enabling the acquisition of high-quality images of the human head.
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3 protocols using 20 channel phased array radio frequency head coil
1
Functional MRI of Whole Brain Imaging
2
Structural MRI Acquisition Protocols
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The Basel sample was scanned using a 3 T MRI system (Siemens Magnetom Prisma, Erlangen, Germany) and a 20-channel phased-array radio frequency head coil. Head movement was minimized by foam padding across the forehead. A whole brain 3-dimensional T1-weighted magnetization prepared rapid acquisition gradient (MPRAGE) sequence was applied. 176 slices were acquired in 4:08 min with a field of view of 256 mm2, voxels size 1 mm3 isotropic spatial resolution, inversion time of 1000 ms, repetition time of 2000 ms, echo time of 3.37 ms, flip angle of 8° and bandwidth of 200 Hz/pixel. The Zurich sample was scanned using a Philips Achieva 3 T whole-body scanner equipped with a 32-channel receive-only phased-array head coil (Philips Healthcare, Best, The Netherlands). Whole brain 3-dimensional T1-weighted anatomical data were obtained by using a MPRAGE with the following parameters: The MPRAGE sequence acquired 160 slices in 7:32 min with a field of view of 240 mm2, voxels size 1 mm3 isotropic spatial resolution, inversion time of 1008 ms, repetition time of 2987 ms, echo time of 3.7 ms, flip angle of 8° and bandwidth of 192 Hz/pixel. Raw images in both centres were assessed by trained neuroradiologists for radiological abnormalities.
3
Structural Brain Imaging with 3T MRI
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The Basel sample was scanned using a 3T MRI system (Siemens Magnetom Prisma, Erlangen, Germany) and a 20-channel phased-array radio frequency head coil. Head movement was minimized by foam padding across the forehead. A whole brain 3-dimensional T1-weighted magnetization prepared rapid acquisition gradient (MPRAGE) sequence was applied. 176 slices were acquired in 4:08 min with a field of view of 256 mm2, voxels size 1 mm3 isotropic spatial resolution, inversion time of 1000 ms, repetition time of 2000 ms, echo time of 3.37 ms, flip angle of 8° and bandwidth of 200 Hz/pixel. The Zurich sample was scanned using a Philips Achieva 3T whole-body scanner equipped with a 32-channel receive-only phased-array head coil (Philips Healthcare, Best, The Netherlands). Whole brain 3-dimensional T1-weighted anatomical data were obtained by using a MPRAGE with the following parameters: The MPRAGE sequence acquired 160 slices in 7:32 min with a field of view of 240 mm2, voxels size 1 mm3 isotropic spatial resolution, inversion time of 1008 ms, repetition time of 2987 ms, echo time of 3.7 ms, flip angle of 8° and bandwidth of 192 Hz/pixel. Raw images in both centres were assessed by trained neuroradiologists for radiological abnormalities.
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