T1-, T2-, and diffusion-weighted images were acquired with a 3.0-Tesla Siemens
Biograph mMR 3 T scanner (Siemens Healthcare Sector, Germany) with a
16-channel head coil. T1-weighted structural images were acquired with the following parameters: echo time (TE) = 1.89 ms, repetition time (TR) = 1670 ms, field of view (FOV) = 250 mm, flip angle = 9°, matrix = 256 × 256, voxel size = 1.0 × 1.0 × 1.0 mm
3, and 208 slices. T2-wighted images were acquired with the following parameters: 47 axial slices, slice thickness = 3 mm, TR = 5000 ms, TE = 81 ms, FOV = 220 × 220 mm2, flip angle = 124°.
Axial diffusion-weighted single-shot echo-planar images were acquired with the following parameters: TE = 92.0 ms, TR = 9500 ms, FOV = 230 mm3, voxel size = 2.0 × 2.0 × 2.0 mm
3, 66 axial slices, slice gap = 0 mm, and b-factor = 1000
sec/mm2. A baseline image without diffusion volume was used as a reference image, and diffusion-weighted images were acquired from 67 different directions. All axial images were acquired parallel to the anterior-posterior commissure line.
Preprocessing steps included skull stripping and eddy -current correction using the FMRIB software Library(FSL)(Jenkinson et al., 2012 (
link)). Motion correction was done by the affine alignment to the b0 image.
Byun J.I., Oh S., Sunwoo J.S., Shin J.W., Kim T.J., Jun J.S., Kim H.J., Shin W.C., Seong J.K, & Jung K.Y. (2022). White matter tract-specific microstructural disruption is associated with depressive symptoms in isolated RBD. NeuroImage : Clinical, 36, 103186.