That data is incorrectly formatted (the body is upside down). This should never happen for dicom data or any data that’s been consistently processed. Check the pipeline from scanner to slicer to correct any processing steps that might have introduced this issue. We take coordinate system issues very seriously so if your research indicates there might be a bug in Slicer please report all the details so it can be investigated.
I think yes, the segmentation relies on the orientation being standard; maybe not but I think so. You can use the Transforms module to rotate (or maybe flip) the data and then harden it before running the algorithm. Together with the updates to the thresholds you should be okay.
Thanks for the feedback @rbumm. I tried the complete range you suggested, but unfortunately, that did not work. I can see the airways are being segmented. However, they are still combined with the Pleura.
I tried the segmentation editor option (as explained in this video). It works but the segmentation quality is not so good. I can see the airways are being segmented nicely, but as you said there is a leak. But not sure how to find this out .
I haven’t tried the suggestion given by Steve yet.
Thanks @rbumm. Apologies for the delay in my reply. I can confirm that the sample dataset works. However, on the data I collected, it still has this issue.
Depends a little bit on your dataset. You may experience leaks from nose and mouse if they are connected with air around the patient in your CT. You could still handle this issue by postprocessing.
Would you mind specifying what postprocessing step is? I had this issue when I tried with the upper airway. And is it possible to reconstruct the entire human airway (from the bronchi to the nasal cavity)? Would you suggest an efficient process?