Achieva 3.0 t magnetic

Imaging data were collected using a Philips Achieva 3.0 T magnetic resonance scanner with a 32‐channel SENSE head coil at the MR Centre of the Psychiatric Hospital, University of Zurich. Functional MRI scans were acquired in 2 runs with 195 images in each run. A gradient‐echo T2*weighted echo‐planar image (EPI) sequence with 38 slices acquired in ascending order was used. Acquired in‐plane resolution was 3 × 3 mm², 3 mm slice thickness and 0.5 mm gap width over a field of view of 240 × 240 mm², repetition time 2000 ms, echo time 25 ms and flip angle 82°. Slices were aligned with the anterior–posterior commissure. Anatomic data were acquired using an ultrafast gradient‐echo T1‐weighted sequence in 160 sagittal plane slices of 240 × 240 mm² resulting in 1 × 1 × 1 mm voxels.

Abdominal MRI examination was performed using a Philips Achieva 3.0-T magnetic resonance imaging system (Philips Medical Systems, Eindhoven, The Netherlands). Breath-hold fast imaging with a 40-ms repetition time, 2-ms echo time, 50-cm field of view, and 256 × 256 matrix was used to acquire the cross-sectional MR images. One 10-mm slice positioned at the L4 level with a clear outline was selected for analysis using SliceOmatic 5.0 software (TomoVision, Magog, Canada) by a medically trained technician. The psoas CSA, SFA, and VFA were measured using the following steps: regional threshold procedures were first applied using the “Region Growing” mode, after which manual delineation was used to draw borders among different tissues in the “edit mode” when necessary (10 (link)). The software calculated different colored areas and expressed the measurements in cm². VFA≥80cm² was defined as visceral obesity.