This is an example of extracting a rectangular volume of interest (VOI) from a 3D image.
I think that this is exactly the function I need; however, when I go to IMTOOL -> ExtractVOI I get the following error:
Undefined function or variable 'img'.
Error while evaluating uimenu Callback
I'm wondering if there is an additional step I need to perform before ExtractVOI. Any insights would be much appreciated!
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