The same 3 T General Electric scanner (equipped with a 32-channel head coil) was used to collect images at all imaging sessions. T1-weighted data (T1w) were acquired in axial orientation with a 3-dimensional fast spoiled gradient echo sequence (176 slices with 1 mm thickness, TR: 8.2 ms, TE: 3.2 ms, TI: 450 ms, flip angle: 12°, field of view: 25 × 25 cm, matrix: 256 × 256, reconstructed to 512 × 512). All T1-images were processed through the longitudinal pipeline in Freesurfer ver. 7.11 [20] (link).Cortical surface area and thickness average were extracted for the ROIs of interest and summed respective averaged over hemispheres. The following Desikan-Killiany FreeSurfer ROIs were used; (i) rostral middle frontal, (ii) middle temporal, and (iii) inferior parietal cortex. All segmentations were manually checked for the three regions and 6 subjects were excluded due to misclassifications close to the rostral middle frontal area.
3 t general electric scanner
Manufactured by GE Healthcare
The 3 T General Electric scanner is a magnetic resonance imaging (MRI) system that operates at a field strength of 3 Tesla. It is designed to produce high-quality diagnostic images of the body's internal structures and functions.
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Lab products found in correlation
2 protocols using 3 t general electric scanner
1
Longitudinal MRI Analysis of Cortical Regions
2
Multimodal MRI Acquisition of Cerebral Blood Flow
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A 3-T General Electric scanner equipped with a 32-channel head coil was used to acquire the scans. For the resting-state fMRI gradient, the echo-planar imaging sequence was used with the following specifications: 37 transaxial slices, thickness; 3.4 mm, gap; 0.5 mm, repetition time (TR); 2000 ms, echo time (TE); 30 ms, flip angle; 80°, field of view; 25 × 25 cm, 170 volumes. A total of 10 dummy scans were collected and then discarded before the experimental procedure. A 3D fast spoiled gradient-echo sequence was used to collect high-resolution T1-weighted structural images, with the following specifications: 180 slices; thickness, 1 mm; TR, 8.2 ms; TE, 3.2 ms; flip angle, 12°; field of view, 25 × 25 cm. The pCASL sequence was set using a stack of spiral fast spin-echo read-out, with 512 sampling points on eight spirals, FOV, 240 × 240 mm2; slice thickness 4 mm; arterial labeling at the cerebellar base; and 1500 ms labeling duration, 1525 ms post labeling delay, and 30 control/label pairs. Cerebral blood flow (CBF) maps were computed, showing tissue CBF in ml/min/100 g (12 (link)).
During the MRI session, the participants were instructed to lay as still as possible with their eyes open, looking at a white fixation cross on the dark screen.
During the MRI session, the participants were instructed to lay as still as possible with their eyes open, looking at a white fixation cross on the dark screen.
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