3t achieva x series mri scanner

Imaging data were acquired using a Philips 3T Achieva X-series MRI scanner. Anatomic images were acquired with a MPRAGE sequence with the following parameters: matrix = 256 × 256; 22 sagittal slices; TR = shortest; TE = shortest; FA = 8°; resolution = 0.94 × 0.94 × 1 mm³. Functional images for the early participants (1–50) were acquired using an 8-channel head coil with an echo planar imaging (EPI) sequence and the following parameters: TR = 2000 msec; TE = 30 msec; FA = 90°; FOV = 240 × 240 mm²; matrix = 80 × 80, 37 oblique slices parallel to orbitofrontal cortex; “Philips interleaved” for participants 1–28 and interleaved for participants 29–49; resolution = 3.0 × 3.0 × 4.0 mm³. Functional images for the remaining participants (51–79) were acquired using a 32-channel head coil with the following parameters: TR = 2000 msec; TE = 30 msec; FA = 90°; FOV = 240 × 240 mm; matrix = 80 × 80, 37 oblique axial slices parallel to orbitofrontal cortex; sequential ascending acquisition; slice thickness = 2.5 mm with a 0.5 mm gap, resolution = 3.0 × 3.0 × 3.0 mm³. Three image volumes (6s) at the beginning of each functional run were discarded to allow the spin lattice magnetization to stabilize.

Images were acquired using a Philips 3T Achieva X-series MRI scanner (Philips Healthcare, Eindhoven, the Netherlands) with a 32-channel head coil. Data preprocessing was performed using SPM12 (University College London, http://www.fil.ion.ucl.ac.uk/spm/) and the CONN toolbox v20b (https://www.nitrc.org/projects/conn) using standard processing steps. See Supplementary Information for complete details.

Imaging data were acquired using a Philips 3T Achieva X-series MRI scanner (Philips Healthcare, Eindhoven, The Netherlands). Anatomic images were acquired with a MPRAGE sequence (matrix = 256 × 256, 220 sagittal slices, TR/TE/FA = shortest/shortest/8°, final resolution = 0.94 × 0.94 × 1 mm³ resolution). Resting state images were acquired using a 32-channel head coil with the following echo-planar imaging sequence parameters: TR/TE/FA = 2000 ms/30 ms/90°, FOV = 240 × 240 mm, matrix = 80 × 80, 37 oblique slices, ascending sequential slice acquisition, slice thickness = 2.5 mm with 0.5 mm gap, final resolution 3.0 × 3.0 × 3.0 mm³ for 7.5 minutes. Parameters for the 32-channel coil were selected to reduce orbitofrontal signal loss due to sinus artifact.

A Philips 3-T Achieva X-series MRI scanner (Philips Medical Systems, Andover, MA) with a SENSE 8 channel head coil was used for data collection at the Ann Arbor Veterans Affairs Hospital. The scanning parameters and analysis methods are consistent with those previously reported by our lab (Duval et al., 2018 (link); Liberzon et al., 2015 (link)) and other fMRI aims in this study (to be reported elsewhere). A 3D FFE-TFE sequence (field of view (FOV)= 256 × 256 mm, slice thickness= 1 mm, 0 mm gap) was used to acquire T1-weighted anatomic images and slice localization, transformation, and co-registration were conducted using axial slices aligned with the AC-PC plane. EPI single shot sequence was used (EPI factor= 43, repetition time/echo time (TR/TE)= 2000/25 ms, flip angle= 90°, field of view (FOV)= 220 × 220 mm, slice thickness= 2.8 mm, 0 mm gap, 42 data points, 150 dynamic scan). Gradient echo blood oxygen level dependent (BOLD) scans were used to acquire functional data.

MRI assessment was conducted in a single Philips 3-T Achieva X-series MRI scanner (Philips Medical Systems, Andover, MA), with an 8-channel SENSE Head coil. T1-weighted anatomic images were acquired with a 3D fast field echo-turbo field echo sequence (field of view (FOV) = 256 × 256 mm, slice thickness = 1 mm, 0 mm gap). Axial slices aligned with the anterior commisure- posterior commisure plane were used for slice localization, transformation, and co-registration. Functional images were acquired with gradient-echo blood oxygen level-dependent scans. Echo planar imaging (EPI) single-shot sequence was used (EPI factor = 43, repetition time/echo time (TR/TE) = 2,000/25 ms, flip angle = 90°, FOV = 220 × 220 mm, slice thickness = 2.8 mm, 0 mm gap, 42 data points, 150 dynamic scan).