How to create a hole in specific region of a 3D image
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Hi, I have a 3D image of an eye orbit created from stack of 2D CT slides as this one :
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/169596/image.png)
As shown in the picture, there should be a small gap (highlighed in red) where nerves of eye passing through. However due to smoothing of the image, this gap is closed.
Now how can I recreate it again?
I am not sure if overlaying a 2D mask on related 2D slides will do. If yes, how can I create this mask using the highlighted region? I even don't know how to get this region out of the 3D image.
Grateful if anyone can help. Thanks!
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