How is the volume calculated in Labelmap statistics

Chenglin_Zhu · May 24, 2021, 12:27pm

Hello!
I am new to Slicer and I’m trying to calculate the volume of the pituitary gland from MRI slides. Now I can segment the pituitary gland out and use segment statistics to calculate its volume. However, I wondering how is the volume calculated out of discrete slides and what assumptions are made?

Appreciate

Andinet_Enquobahrie · May 24, 2021, 1:14pm

Hello @Chenglin_Zhu

Here is some documentation
https://slicer.readthedocs.io/en/latest/user_guide/modules/segmentstatistics.html

Actual code

github.com

Slicer/Slicer/blob/master/Modules/Scripted/SegmentStatistics/SegmentStatisticsPlugins/LabelmapSegmentStatisticsPlugin.py#L94-L97

    
      
          if "volume_mm3" in requestedKeys:
            stats["volume_mm3"] = stat.GetVoxelCount() * cubicMMPerVoxel
          if "volume_cm3" in requestedKeys:
            stats["volume_cm3"] = stat.GetVoxelCount() * cubicMMPerVoxel * ccPerCubicMM

-Andinet

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How is the volume calculated in Labelmap statistics

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