Hello, I am new to Slicer and have a few questions about the Segment Statistics Module, particularly how it calculates volume. I am currently segmenting muscle groups, subcutaneous and intramuscular fat within a single slice from MR Images of the thigh. I have read that the Labelmap Statistics calculates volume as the product of the pixel spacing (mm3) and the pixel count. I am curious if Slicer is using the actual pixel dimensions given in the DICOM header combined with the slice thickness or not. I cannot find anything on this from the user manual, so I am looking here for help.
Also for the output of segmentation, is it normalized to total volume? Or is it an absolute volume?
I have attached a photo that I hope will better illustrate the issue I am having.