Re: [mitk-users] [Extern] - different volume depending on CT slice thickness?

[Schaumann, S. <s.s...@dk...>]

Hi Laura,

the volume calculation of MITK already takes into account the thickness of the slices. You should be good there.

If you want to check for yourself, you can verify using the "Statistics"-view. By opening it and selecting the image & segmentation in the Data Manager, you will see some statistics about the masked region. This includes the volume and the number of voxels (N). By dividing these two (volume/N), you can verify how much volume each voxel has. For example with a spacing of 2mm, one would expect each voxel to have a volume of 2mm x 2mm x 2mm = 8mm³ , so the volume should be 8 times the number of voxels. You can compare this with the volume you get from the Clipping Plane view and make sure they match up.

I hope this helps!

Best regards,
Stephen


-----Ursprüngliche Nachricht-----
Von: Laura D'Ambrosio <l.m...@we...> 
Gesendet: Dienstag, 5. September 2023 13:07
An: mit...@li...
Betreff: [Extern] - [mitk-users] different volume depending on CT slice thickness?

Hi :)

I’m using the MITK program for my thesis as medical student. I’m not a pro in programming oder IT-stuff.
I manually segmented bone defects/non-unions and got the volume of these calculated with the tool of the clipping planes. I used series of computed tomography and put them in a DICOM file. Then I imported them to MITK.

Now I was wondering if the program also calculates the volume correctly when the slice thickness changes from the CT series? I noticed that some of the patients had a CT with a slice thickness of 1mm and some others with 2mm. Do I have to calculate something different then or does the MITK program adapt automatically.

I’m happy for any help!

Greetings,
Laura




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