Nipype algorithms rapidart


I was wondering, what exactly the rapidart function is doing. What does the input corresponding to “norm_threshold”? Is it something like setting a threshold for framewise head displacement for volumes? For instance, if I specify “norm_threshold” as 1, does that mean that the rapidart finds out volumes, whose movement is above 1mm?


@sheyma - that is correct. the norm threshold either works on deltas of frame displacement between volumes (scan to scan) or on actual frame displacement relative to time 0.

Thanks for the reply Satra. For the given example, rapidart finds the volumes exceeding 1mm FD to be 28, 29, 30, 31, 32, 33, 34, 35, 36, which perfectly matches to your description.