<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Times New Roman; font-size: 12pt; color: #000000'>Hello All, <div>I was wondering, if there is any function in ITK, which will sum all the values in the voxels in a region. If I iterate over the region, it is very time consuming. </div><div><br></div><div>For example, I am looking for some functionality similar to sum(v) in matlab, where v is a vector..</div><div>Thanks </div><div><br></div><div>Vikash</div></div></body></html>