32 channel high resolution phased array coil

Three-dimensional structural MRI scans were acquired using a 3.0 Tesla Siemens Trio whole-body imaging system (Siemens Medical Systems, Iselin, NJ, USA), using a dedicated 32-channel high-resolution phased-array coil for brain imaging. T1-weighted images were acquired parallel to the anterior commissure-posterior commissure line using T1-weighted magnetization-prepared rapid gradient-echo imaging (repetition time=1,900 ms, echo time=2.6 ms, field of view=220 mm, 256×256 matrix size, 176 coronal slices without gap, 1×1×1 mm³ voxels, flip angle=16°, and number of excitations=1).

All volunteers were scanned with a Siemens Skyra 3.0 T MRI scanner (Siemens Healthineers, Erlangen, Germany) using a 32-channel high-resolution phased array coil in the Nansha Imaging Center of Guangzhou First People’s Hospital. None of the participants were taking any medication that might have influenced cognition during the scans at the time of the study. The volunteers laid in a supine position with their heads fixed snugly with foam pads to minimize head motion. MRI sequences included 3D T1-weighted imaging and 3D SWI. An axial orientation parallel to the anterior commissure to the posterior commissure (AC-PC) line in all sequences covered the entire brain. T1-weighted imaging was performed under the following parameters: repetition time (TR) =2,530 ms, echo time (TE) =2.96 ms, slice thickness =1.0 mm, flip angle =7°, field of view =256×256 mm², and acquisition matrix =352×352. SWI was performed with the following parameters: TR =28 ms, TE =20 ms, slice thickness =1.0 mm, flip angle =15°, field of view (FOV) =220×193.8 mm², and acquisition matrix =352×352.