Dear all,
At the moment I am preprocessing my MRI data with FSL. We would like to exclude subjects with a sudden movement in the translation direction > 1 voxel (2 mm). We would like to do this based on the outcome of the Feat. I have learned from a colleague that I should look at the second plot of the pre-stats of the feat report log (MCFLIRT estimated translations (mm)). In the attachment I have added a file for which I thought the sudden movement was a little less than 2 mm. Now another colleague told me I have to look at the third plot of feat report log (MCFLIRT estimated mean displacement (mm)) and that I have to look at the line for relative movement in that plot.
Now I have the following questions:
- At which plot should I look?
- If I have to look at the second plot: is it only important to look how large the movement of one of the lines is and if there is a sudden increase or decrease > 2 mm? Or is it also important how large the movement is with respect to the point where the line started at time point 0 (at the start of scanning)? And is it also important if the line crosses the x-axis (the 0.0 line)?
I hope someone can help me with this.
Best, Jasper
|