# Paranasal Sinuses Volume Calculate

**URL:** <https://discourse.slicer.org/t/paranasal-sinuses-volume-calculate/6120>\
**Category:** Support\
**Tags:** segmentation, quantitative\
**Created:** [March 12, 2019, 5:41pm UTC](https://discourse.slicer.org/t/paranasal-sinuses-volume-calculate/6120 "2019-03-12T17:41:32Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![hozermd](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/hozermd/32/2792_2.png) [@hozermd](https://discourse.slicer.org/u/hozermd)\
**Post date:** [March 12, 2019, 5:41pm UTC](https://discourse.slicer.org/t/paranasal-sinuses-volume-calculate/6120/1 "2019-03-12T17:41:32Z")

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Hi,  
I want to measure the volume of each paranasal sinuses. Each one separately; Left, Right; sphenoid, ethmoid, maxillary, frontal sinus and total nasal cavity volume. I’ve tried many methods, extensions and programs. For example; ImageJ, ITKSnap and in Slicer automated segmentation extensions. ITKsnap and some slicer extensions is good but not so simple. What is your advice?

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**Author:** ![gcsharp](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/gcsharp/32/863_2.png) [@gcsharp](https://discourse.slicer.org/u/gcsharp)\
**Post date:** [March 12, 2019, 6:38pm UTC](https://discourse.slicer.org/t/paranasal-sinuses-volume-calculate/6120/2 "2019-03-12T18:38:02Z")

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The paranasal sinuses contain a mixture of air, bone, and phlegm, and therefore don’t lend themselves to thresholding or other simple methods. I suggest you contour them manually. In Slicer, you can contour every other slice and interpolate.