20 channel radio frequency head coil

All MRI data was acquired on a Siemens Skyra 3.0T scanner equipped with a standard 20-channel radio-frequency head coil. Thirty-two slices were obtained in an oblique orientation of 30° to the anterior commissure-posterior commissure line to prevent signal drop-out from the prefrontal cortex (27 (link)).
High-resolution structural images were collected using a standard T1-weighted pulse sequence (TR = 2,100 ms, TE = 3.43 ms; 32 slices; 1 × 1 × 1 mm voxels). Using these images, functional activation could be localized. Functional data for four runs, consisting of 172 volumes each, was collected by using a standard T2^*-weighted echo planar sequence (TR = 2,000 ms; TE = 30 ms; 3 × 3 × 3 mm voxels; flip angle = 90°; FoV = 256 mm; slice gap = 1 mm) sensitive to the blood oxygen level dependent (BOLD) contrast.

Functional and anatomical images were acquired using a 3T MRI system (Siemens Verio or Vida, Erlangen, Germany) with a 20-channel radiofrequency head coil. For functional images, participants were asked to close their eyes, stay awake, and not perform any head motions until the scan was performed, and the inside of the scanner was monitored in real time. Participants also verbally answered questions about their condition between the scans. For data acquisition, two-dimensional echo planar imaging (EPI) was used with the following parameters: repetition time (TR)/echo time (TE)/acquisition time (TA) = 2,500 ms/25 ms/6 min 45 s, field of view (FOV) = 231 mm, flip angle (FA) = 90°, in-plane resolution = 3.5 × 3.5 mm 2, slice thickness = 3.5 mm, slices = 42, and measurements = 160. For anatomical image acquisition, T1-weighted anatomical three-dimensional imaging with magnetization-prepared rapid acquisition gradient echo (MPRAGE) was used with the following parameters: TR/TE/inversion time (TI)/TA = 1,900 ms/3.3 ms/900 ms/3 min 40 s, FOV = 256 mm, FA = 9°, in-plane resolution = 1.0 × 1.0 mm2, slice thickness = 1 mm, slices = 160.