Location and kind of anomaly for each of the QC Issue A subjects are detailed in these spreadsheet of Anatomical QC Findings:
Slides of the structural images showing the Anatomical QC Findings for QC Issue A subjects:
QC Issue B: Surface Imperfections (Not edited)
In the following descriptions, “deep” and “superficial” refers to how deeply or superficially the surface’s segmentation outline cuts into the volume. Too deep means that the white surface outline is erroneously not capturing all the white matter it should, or the pial surface outline is erroneously not capturing all the grey matter that it should. Too superficial means that the white or pial surface outline is erroneously capturing too much (not just white or grey matter, respectively).
Examples of these B series imperfections are shown and described in these slides: B codes.pdf
B1) white surface imperfections
Note:Many HCP-Development subjects have Issues B1b and/or B2b. We see a high frequency of surface imperfections due to white and pial surface outlines being pulled away from the boundaries than in HCA subjects. We have yet to identify the reasons why this is the case in HCP-D and not in HCP-A.
This image is an example of something that is seen in many HCD subjects and not often, if at all, in HCA.
QC Issue C: Myelin Map Notable Quality Issues (beyond those caused by surface imperfections covered by issue code B)