I have been using the Segment Statistics Module to try and compute the volumes of segmentations. However, the values do not seem to be correct. For example, the volume of the right ventricle is shown to be greater than the volume of the left ventricle. Also the volume is much lower than what we found to be the stroke volume.
Is there any reason that my readings are coming out this way?
Thank you for your response. I had used the Grow from Seeds Effect. We found the volume of blood pumped by the left ventricle per beat to be 9.7 ± 2.1 mm3 with some previous research…yet the left ventricle does not seem to have near that much volume itself.
These seem to be just the seeds that you used for region growing. Have you tried going to Segment Editor module and click Apply in Grow from seeds effect?
But @muratmaga is right, too. Non-clinical scanners often save their data with incorrect spacing that you need to fix manually. What is the spacing value displayed in Volumes module / Volume information section?
2633 voxels are about 50x50 voxels, which would be too few for a highly detailed surface that you show in the screenshot. So, it is a bit more likely that you compute volume for not the right segmentation node.
Can you share an example segmentation (upload somewhere and post the link here) so that we can have a look?
@Angel as @lassoan indicated previously, you didn’t finalize the ‘grow from the seed’. You need to first initialize using the seeds and review the expected segmentation with those seeds. If you are satisfied with that you then need to hit apply. Here is a result from your share scene where I simply hit initialize followed by apply. I think these numbers make much more sense:
Yes, it looks like the segmentation does not cover the entire ventricle (it looks like up to about 5% of the volume may be missed in the segmentation). You can adjust the “Editable intensity range” so that includes a bit more of the dark regions (set the lower threshold value a bit lower) and use Margin effect to grow it a bit into these regions.