Hi All, 

I've been using dmri_motion to quantify motion in our DTI data.  We are uncertain how to determine what the –T threshold should be. We have read through the wiki and the related papers and are confused what this number represents, how it effects the output, and the rational for selecting a specific threshold value. We have tried the default (100) and almost all of our scans have the floor values (0 and 1) for percent bad slices and average dropout score, and we are concerned that this value is most likely inappropriate for our data. We have tried other values but are unsure what a suitable threshold value should be for our data.  We are concerned that this number effects the output, and want to make sure we are using an appropriate value.  What is the best way to select the –T threshold and the rational for selecting one value versus another?

Thanks,

Colleen Buckless

Research Assistant

Center for Neurodevelopmental and Imaging Research

Kennedy Krieger Institute

443-923-2747

Buckless@kennedykrieger.org

 

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