I tried the way Prof @lassoan described but the results are not quite what i expected.
This is close to the ROI i want to have uniformly around the implant.
But when i have good ROI in one side other side looks like this,
if there is a way of dragging the 8 corners of the ROI box independently the problem will be solved i guess if that is possible. or if there is a way of transforming the ROI box around the center of the segment.
if there is way of orienting this plane,
I tried the script and i am not sure what exactly happens. I can see the difference in the Red Slice when i put the script.
I made a small video to highlight the problem with the plan and what happens.
I can share the data as well if that would help in solving the problem.
thank you.