3.0t trio tim mri scanner

In our hospital, MRI data were collected from all subjects using a German Siemens 3.0T Trio Tim MRI scanner with an 8-channel phased-array head coil. The first acquisition was made the day (7 pm to 9 pm) after PSG monitoring and the subsequent after at least 6 months of qualifying CPAP treatment. Foam pads and ear plugs were used to decrease subject head movement and scanner noise. All subjects must lie on the examination couch with their eyes closed, be awake, and avoid involvement in any specific thought activity prior to scanning. Conventional T1-weighted imaging was first performed using the following parameters: repetition time (TR), 250 ms; echo time (TE), 2.46 ms; thickness, 5 mm; gap 1.5 mm; field of view (FOV), 220 mm × 220 mm; and slices, 19. T2-weighted imaging had the following parameters: TR, 4000 ms; TE, 113 ms; thickness, 5 mm; gap, 1.5 mm; FOV, 220 mm × 220 mm; and slices, 19. The rs-fMRI data were imaged using a gradient-echo planar imaging pulse sequence with the following parameters: TR, 2000 ms; TE, 30 ms; flip angle, 90°; thickness, 4 mm; gap, 1.2 mm; FOV, 230 mm × 230 mm; matrix, 64 × 64; slices, 30; 240 volumes; and scan time, 8 min 6 s. These images were evaluated jointly by two senior radiologists to exclude other brain parenchymal disorders, and no subjects were excluded from the procedure.

Images were acquired on a Siemens 3.0T Trio TIM MRI scanner at the West China Hospital. All subjects underwent high resolution three-dimensional T1-weighted anatomical brain scans (MPRAGE, 176 slices, TR/TE = 1900/2.26°msec, flip angle = 9°, acquisition matrix = 256 × 256, resolution = 1 × 1 × 1°mm³).