20 channel phased array coil

MRI was obtained on a 3.0T MAGNETOM PRISMA system (Siemens) using a 20-channel phased array coil. For conventional MRI scans, the parameters for T1-weighted imaging were TR/TE = 410 ms/13 ms, respectively, and field of view (FOV) = 22 cm × 22 cm, the parameters for T2-weighted imaging were TR/TE = 3400 ms/100 ms, respectively, and FOV = 22 × 22 cm, and the parameters for T2-fluid-attenuated inversion recovery imaging were TR/TE = 12,000 ms/130 ms, respectively, and FOV = 22 × 22 cm. Additional MRI sequences included three-dimensional T1 magnetization-prepared rapid gradient echo (TR = 2,300 ms, TE = 2.4 ms, inversion time = 991 ms, bandwidth = 200 Hz, number of averages = 1, matrix size = 154 × 256, coronal section thickness = 1.2 mm, flip angle = 8°, acquisition time = 3:23 min).

After a mock scanner training session, magnetic resonance imaging (MRI) was performed using a Siemens MAGNETOM Prisma^fit 3 Tesla MRI scanner (Siemens Medical Systems) with a 20-channel phased array coil. A high-resolution magnetic resonance imaging scan was acquired using a T1-weighted three-dimensional magnetization prepared rapid gradient echo (MP-RAGE) sequence with the parameters: 256 × 256 × 176-matrix size with 1 × 1 × 1-mm³ resolution; inversion time = 900 ms; repetition time (TR) = 1950 ms; echo time (TE) = 2.26 ms; flip angle = 90°; Total scan duration was 4 min and 14 s. A diffusion weighted image was acquired using a dual spin echo, single shot, pulsed gradient, echo planar imaging sequence in 64 diffusion sensitized gradient directions with the following parameters: TR = 8100 ms; TE = 69 ms; flip angle = 90°; 70 axial slices; 2 mm × 2 mm × 2 mm voxel size; FOV = 256 mm; b value = 1000 s/mm²; Total scan duration was 9 min and 29 s.