MRI scans were obtained with a 1.5 Tesla GE Signa HDx 0M5 TwinSpeed scanner (GE Healthcare, Wukesha, WI) (TE = 3.0 msec, TR = 8.7 msec, TI = 270 msec, flip angle = 8°, delay = 750 msec, bandwidth = ± 15.63 kHz, field of view = 24 cm, matrix = 192 × 192, voxel size = 1.25 × 1.25 × 1.2 mm). Real-time, prospective motion tracking and correction (PROMO) was used to correct for motion artifacts (Brown et al., 2010 (link)). Extensive information regarding the spiral navigator pulse sequences and an extended Kalman filter algorithm used is found in White et al. (2010) (link). AtlasTrack automated DTI was used to produce the white matter streamlines (Hagler et al., 2009 (link)). Of note, UF in the current study involves the bundle of fibers connecting the orbitofrontal region to the anterior temporal lobe, inclusive of the amygdala.
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Motion-Corrected MRI and Automated DTI Analysis
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Corresponding Organization : Salk Institute for Biological Studies
Other organizations : University of California, San Diego, University of Utah
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Variable analysis
independent variables
- Motion tracking and correction (PROMO)
- White matter streamlines
- 1.5 Tesla GE Signa HDx 0M5 TwinSpeed scanner
- TE = 3.0 msec
- TR = 8.7 msec
- TI = 270 msec
- Flip angle = 8°
- Delay = 750 msec
- Bandwidth = ± 15.63 kHz
- Field of view = 24 cm
- Matrix = 192 × 192
- Voxel size = 1.25 × 1.25 × 1.2 mm
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