<html><head><meta http-equiv=Content-Type content="text/html; charset=iso-8859-1"><META name="Author" content="Novell GroupWise WebAccess"></head><body style='font-family: Tahoma, sans-serif; font-size: 13px; '>Thank you for your response and suggestions Dr Mori! I have a couple of more specific questions if that's alright...<br><br>I have tryed the cut tool and it is not exactly what I am looking for, I think the Or--And---Or set of ROIs better suits our needs. I am trying to calculate the average FA in between the two extreme Or ROIs. When I go to the stat profile window, what I am currently doing is exporting the values from the slices between my two OR ROIs into excell and calculating the mean FA. My question centers around what, precisely, the values are. The table has the following columns:<br><br><br>Slice <br>#_Of_Fibers<br>Max_Val<br>Min_Val<br>Mean_Val<br>Std_Dev<br><br>Pixel#--<br>Max#-- <br>Min#-- <br>Mean#-- <br>Std_Dev-- (Fiber/Pixel)<br><br><br><br>Inorder to calculate a mean FA for a selected number of slices, would the following be correct?: (ie for slice 1, 2, 3...)<br><br>((Pixel#)(Mean_val))1+((Pixel#)(Mean_val))2+((Pixel#)(Mean_val))3....... / total # of pixels<br><br><br>Or....<br><br>((#_Of_Fibers)(Mean_val))1+((#_Of_Fibers)(Mean_val))2+((#_Of_Fibers)(Mean_val))3....... / total #_Of_Fibers<br><br><br><br>Also, could you possibly explain what the rest of the values are? (especially beyond pixel #)<br><br>Thank you again, I really appreciate the help<br>Matt Gnirke<br><br><br><susumu@mri.jhu.edu></susumu@mri.jhu.edu></body></html>