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help > RE: Generate Scrubbing Covariate w/ Alternative FD metrics?
May 9, 2020 12:05 AM | Alfonso Nieto-Castanon - Boston University
RE: Generate Scrubbing Covariate w/ Alternative FD metrics?
Hi Paul,
Typically scrubbing expects 2 timeseries in the QC_timeseries input (framewise displacement and global-signal change) instead of just 1 timeseries as in your QC_FDpower input. In any way, it is perfectly fine to define an alternative scrubbing covariate based on thresholding only the QC_FDpower timeseries, you could do that, for example, using the syntax:
conn_convertl12l1covariate('scrubbing' , thr, [], 'QC_FDpower', 'scrubbingFD', []);
where thr is your desired FD threshold (see "doc conn_convertl12l1covariate" for details; the key is simply the [] part at the end which is going to suppress the creation of the default QC_motion and QC_GSchange second-level covariates)
Best
Alfonso
Originally posted by Paul Cernasov:
Typically scrubbing expects 2 timeseries in the QC_timeseries input (framewise displacement and global-signal change) instead of just 1 timeseries as in your QC_FDpower input. In any way, it is perfectly fine to define an alternative scrubbing covariate based on thresholding only the QC_FDpower timeseries, you could do that, for example, using the syntax:
conn_convertl12l1covariate('scrubbing' , thr, [], 'QC_FDpower', 'scrubbingFD', []);
where thr is your desired FD threshold (see "doc conn_convertl12l1covariate" for details; the key is simply the [] part at the end which is going to suppress the creation of the default QC_motion and QC_GSchange second-level covariates)
Best
Alfonso
Originally posted by Paul Cernasov:
Hi Alfonso,
I'm stumped trying to create a new scrubbing covariate using the FD power metric (instead of ARTs default). I use the conn_convertl12l1covariate command (or the GUI) to create my QC_FDpower variable no problem. When I select this new variable as the input for a scrubbing variable it throws an error message (see attached). I looked at the help for the conn_convertl12l1covariate command and it indicates that scrubbing assumes the input contains both the BOLD signal change & the FD change as in QC_timeseries. How can I proceed?
Kindly,
Paul
I'm stumped trying to create a new scrubbing covariate using the FD power metric (instead of ARTs default). I use the conn_convertl12l1covariate command (or the GUI) to create my QC_FDpower variable no problem. When I select this new variable as the input for a scrubbing variable it throws an error message (see attached). I looked at the help for the conn_convertl12l1covariate command and it indicates that scrubbing assumes the input contains both the BOLD signal change & the FD change as in QC_timeseries. How can I proceed?
Kindly,
Paul
Threaded View
| Title | Author | Date |
|---|---|---|
| Paul Cernasov | May 7, 2020 | |
| Alfonso Nieto-Castanon | May 9, 2020 | |
| Paul Cernasov | May 11, 2020 | |
| Alfonso Nieto-Castanon | May 13, 2020 | |
| Paul Cernasov | May 13, 2020 | |