Density of mask
I see ways to measure the density within a box or circular region, however, I am interested in measuring the average density of the entire mask. I see I can export grayscale values of a particular mask as a txt file and I could then calculate that myself, but doing so generated a file with more lines than Microsoft Excel could handle., not to mention it would be much simpler just to get the mean, std dev, min, max, area, volume of a mask with one click. If not all of that, at least the mean.
Is there a way to do that?
Thanks,
Kirk
continue from this discussion. i am wondering if we can do similar analysis on a ROI base. I am only interested in part of the bone but not the whole bone. can we do this on sub-volume? thanks
Tian
TIan,
One way to do that would be to create a mask just of your sub-region and then use the method that Erik described above. Another way would be to use the circle or rectangle density measurement tool if you are just looking for a measurement within an area.
Kirk
Erik,
That is exactly what I was looking for! Not sure how I ever missed that before, but Thanks!
Kirk
Dear Kirk,
I guess what you try to figure out is included in the mask properties.
In the mask list, select the mask you want and then click on the properties button below the mask list (orange button with an i).
You then get a dialog like this one, which includes average, min, max HU and standard deviation.
(If you need gray values instead of HU, you can change it in the Preferences).
I hope this is what you are looking for: