Finding threshold for skull segmentation of Head CT images

Does anyone have a good solution to automatically figuring out the threshold to obtain a skull mask for head CT images? The histogram from imtool shows me that the best threshold range would probably be between two peaks which isn't too helpful.

Answer 1

[Matt J]

What about multithresh()?

[Katherine Beaulieu]

Thanks for the suggestion, I'll give it a try!

[Matt J]

You're welcome, but if it works, please Accept-click the answer.