Unusual DVARS, outlier count, carpet plot patterns in initial volumes

[chrisgorgo]

Example 1

Example 2

We are seeing this across scanners and sequences. I wonder if this has something to do with the fact that those values are calculated after motion correction and motion correction is using a reference volume calculated using an average of a subset of X first volumes. https://github.com/poldracklab/mriqc/blob/ca6b21c84566f6aadeb1aac2809d4ec09278b5e3/mriqc/workflows/functional.py#L585

[chrisgorgo]

Here's a good case we can try to test this theory on: https://s3.amazonaws.com/openneuro.outputs/447d26e4f9fe6ce7b5ff851356280f6a/dae3c6ba-9b1f-471e-b54d-64c9cfc34f91/reports/sub-9_task-cueexposure_bold.html

From https://openneuro.org/datasets/ds001247/versions/00001?app=MRIQC&version=65&job=5a99767bdf832f000104dd30

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[doritdorit]

Has this been resolved? I'm seeing similar issues with the beginning of some runs of my data (not all) but also at the ending of a run (processed with MRIQC version: 0.11.0, though).

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.