I need help subtracting 2 DICOMs and getting a volume (mm3) as result

Support
1

Hi, I need help. I’m new here.

I have 2 DICOM from the same patient. One before the intervention and one after. I can see there’s a difference, but I would like to get the volumetric difference between the two files.
I would appreciate a step by step, since I’m pretty new.

Thanks!

2

Is it for assessing fat resorption for breast reconstruction?
What imaging modality did you use?

3

Thanks for answering.

I want to calculate the hard tissue/bone gain or loss of the procedure, comparing two DICOMs of the same patient taken at different times. I can visually see the difference of both surfaces, but I would like to calculate the volume of such difference

4

You can measure volume difference of bone and tissue by the following steps:

  • Register the images.
  • Segment the same region in both images using Segment Editor. Enable overlap in Masking settings.
  • Use Erase effect or Logical operators effect to remove regions that are farther away from the region of interest. Use the same region for all segments.
  • Use Segment Statistics module to get volume of each segment
5

Thank you for answering.

I’m just unable to grasp how to use this.

6

You can start with learning how to segment the bone using Segment Editor. This page is a good starting point. There are also lots of tutorials on youtube.