Figure 4. Selection of spatial and temporal quality metrics for resting state functional MRI (R-fMRI).

Spatial metrics include: (a) Ghost to single ratio (GSR) ⁵⁰ ; (b) smoothness of voxels indexed as full-width half maximum (FWHM) ⁶² , (c) signal to noise ratio (SNR) ⁵⁰ . Temporal metrics are: (d) mean framewise displacement ⁵² ; (e) standardized DVARS ⁶³ , and (f) global correlation (GCORR) ⁶⁴ —See Table 5 for details on this and the other quality metrics released. The colored scatterplots illustrate the quality metrics distribution for spatial MRI dataset within a given ADBIE II collection (17 cross-sectional and 2 longitudinal collections). The black and white violin plots represent a kernel density estimation of the distribution across all datasets for each quality metrics with its midline thick gray line representing the value that occurs most commonly in the distribution. For each plot, the horizontal gray lines mark the 1st, 5th, 25th, 50th (solid gray line), 75th, 95th and 99th percentiles starting from the bottom.