Authorea

Anisha Keshavan added We_are_assuming_that_the__.tex over 8 years ago

Commit id: f17a26c6e5f6628330fafc6204a671446a1efa8c

deletions | additions

We are assuming that the consistency of positioning varies between sites, because we did not define a standardized positioning protocol. A big reason for this is because we want to be able to incorporate data that was already acquired for future studies. In the scaling factor derivation, we take the average of the two volumes to calibrate, and calculate an "overall" bias, but we cannot say much about the bias due just to positioning. However, we do have a measure of positioning consistency that is calculated via the amount of variability due to "run" in our ICC calculation. This variance component is much smaller than the variance due to subjects/sites/subjects x site/undexplained, so we will \textbf{report this in a supplemental table}