Clip Planes & VOI Punch

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Clip planes and VOI Punch are the two ways to eliminate parts of the image that do not add to the diagnostic value of the image. VOI Punch is much better known and is simply an erase tool. Simply circle a region of interest and choose whether to eliminate everything on the inside or outside of that selection. The problem with VOI Punch is that it is very straightforward to undue the prior erased selection however, if you find yourself in a moment where you would like to undue four erases ago without undoing the prior three, there is no option to do so. Clip Planes are less well known and harder to master, but once you do, add functionality that you cannot get with VOI Punch.