Hi there! So glad I've found this forum!
I have CT-scans of dog tibias and femurs, the aim of my current study is to calculate the cross-section area in the middles of all the bones. Firstly I conduct the moment of inertia analysis, the way of aligning bones along the axes. The free space around the bone doesn't matter, right? The program uses densities to identify where the bone is, and where is a "dark matter", am I right?) And I don't have to choose the bone including slices precisely, right? After that, it shows me the 3d model with the blue perpendicular lines in the center. Is that a geometrical center of the bone, can it ne used as a middle of the shaft? It's very important for me, because I want to make the results comparable. If so, why it doesn't show the center sometimes? What it depends on? At the second step I go to slice geometry and find the measurements of the slice near the center, which was calculated at the previous step (this center is also shown at the cross-sections of the new-opened window). Here I have another question, what is the angle between the cut and the shaft? Is it perpendicular to every slice?
Please write me anything you would find helpful to me!
Thank in advance!