Getting HU values from one ROI applied to two different images

Support
1

Hi all, is there a way to extract ROI values as arrays by using the same ROI on different images?
Suppose I want to register two CT scan in two different timepoints, I’d like to draw a ROI and then having the HU values as array with coordinates of image 1 and image 2. I read about the command slicer.util. arrayFromVolume but I’m not sure it’s the same case as mine.

Thank you!

2

Be sure to resample the data to the same pixel space (e.g. using the Resample Image (BRAINS) module) before doing array-level access to the pixel data.