# Airway parameter calculation

**URL:** <https://discourse.slicer.org/t/airway-parameter-calculation/14623>\
**Category:** SlicerCIP\
**Created:** [November 16, 2020, 1:38am UTC](https://discourse.slicer.org/t/airway-parameter-calculation/14623 "2020-11-16T01:38:21Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![1119](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/1119/32/8153_2.png) [@1119](https://discourse.slicer.org/u/1119)\
**Post date:** [November 16, 2020, 1:38am UTC](https://discourse.slicer.org/t/airway-parameter-calculation/14623/1 "2020-11-16T01:38:21Z")

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In the CIP module, select the airwayinspector to calculate the relevant parameters. After selecting the location, the calculation result cannot be generated ![%KV2Z2I~{L}R)8M@}LAZV)0](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/6/b/6be4b93e6ac4ef4d2435c1f48e0c196e03c77a7b.png)

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**Author:** ![1119](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/1119/32/8153_2.png) [@1119](https://discourse.slicer.org/u/1119)\
**Post date:** [November 16, 2020, 1:43am UTC](https://discourse.slicer.org/t/airway-parameter-calculation/14623/2 "2020-11-16T01:43:13Z")

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Before calculating the parameters, I have extracted the centerline of the airway, and used the CROSS-SECTION in VMTK in version 4.11 to select a plane orthogonal to the centerline. It is precisely because of this that the airway parameters cannot be calculated. Situation, but I don’t know where the problem is. Has anyone encountered this situation before? Can you explain me something?