Participants were scanned in a Philips Intera Achieva 3T scanner with an 8 channel head coil at the Dartmouth Brain Imaging Center. T1-weighted anatomical scans were acquired at the end of each session (MPRAGE, TR = 9.85 s, TE = 4.53 s, flip angle = 8°, 256 × 256 matrix, FOV = 240 mm, 160 1 mm thick sagittal slices). The voxel resolution was 0.9375 mm × 0.9375 mm × 1.0 mm. Functional scans of the whole brain were acquired with an echo planar imaging sequence (TR = 2.5 s, TE = 35 ms, flip angle = 90°, 80 × 80 matrix, FOV = 240 mm × 240 mm) every 2.5 s with whole brain coverage (41 3 mm thick interleaved axial slices, giving isotropic 3 mm × 3 mm × 3 mm voxels). We acquired a total of 2718 functional scans with 1350 TRs in four runs during the first session and 1368 TRs in four runs during the second session.
Intera achieva 3t scanner
Manufactured by Philips
The Intera Achieva 3T scanner is a magnetic resonance imaging (MRI) system manufactured by Philips. It is a 3 tesla (3T) superconducting MRI scanner designed for high-field imaging applications. The Intera Achieva 3T scanner provides detailed images of the body's internal structures and functions.
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4 protocols using intera achieva 3t scanner
1
Multimodal Neuroimaging of Brain Function
2
Structural and Functional Brain Imaging
3
Functional MRI of Brain Activity
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Subjects were scanned using a Philips Intera Achieva 3T scanner with a 32 channel head coil at the Dartmouth Brain Imaging Center. Functional scans were acquired with an echo planar imaging sequence (TR = 2.5 s, TE = 30 ms, flip angle = 90°, 112 × 112 matrix, FOV = 224 mm × 224 mm, R-L phase encoding direction) every 2.5 s with a resolution of 2 × 2 mm covering the whole brain (49×2 mm thick interleaved axial slices). We acquired 140 functional scans in each of the 10 runs. We acquired a fieldmap scan after the last functional run and a T1-weighted anatomical (TR = 8.265 ms, TE = 3.8 ms, 256 × 256 × 220 matrix) scan at the end. The voxel resolution of anatomical scan was 0.938 mm × 0.938 mm × 1.0 mm.
4
Countermanding Task in Macaques
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Data was collected from one male bonnet macaque (Eu, Macaca radiata, 8.8 kg, 6 y.o.) and one female rhesus macaque (X, Macaca mulatta, 6.0 kg, 8 y.o.) performing a countermanding task21 (link),25 (link). All procedures were in accordance with the National Institutes of Health Guidelines, the American Association for Laboratory Animal Care Guide for the Care and Use of Laboratory Animals and approved by the Vanderbilt Institutional Animal Care and Use Committee in accordance with the United States Department of Agriculture and Public Health Service policies. Surgical details have been described previously84 (link). Briefly, magnetic resonance images (MRIs) were acquired with a Philips Intera Achieva 3 T scanner using SENSE Flex-S surface coils placed above or below the animal’s head. T1-weighted gradient-echo structural images were obtained with a 3D turbo field echo anatomical sequence (TR = 8.729 ms; 130 slices, 0.70 mm thickness). These images were used to ensure Cilux recording chambers were placed in the correct area. Chambers were implanted normal to the cortex (Monkey Eu: 17°; Monkey X: 9°; relative to stereotaxic vertical) 1 mm right of the midline, 30 mm (Monkey Eu) and 28 mm (Monkey X) anterior to the interaural line.
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