DCAN Labs BIDS DWI Runs

Hi all,

I’m conducting tractography on the DCAN Labs BIDS neuroimaging DWI files, specifically the DWI inputs. I selected my participants based on who had good-quality neuroimaging data, and so who passed the DCAN Labs QC procedure. However, I’ve found that for a few participants, they have 2 DWI runs which, together, are considerably smaller in size (~40 KB) than those with a single run (~160KB), which consequently means that QSIprep does not detect DWI files in those with 2 runs. I wanted to ask how the QC procedure works, if such participants were included?

Thank you,

Alicja