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rbumm / SlicerLungCTAnalyzer

This is a 3D Slicer extension for segmentation and spatial reconstruction of infiltrated, collapsed, and emphysematous areas in lung CT.
Apache License 2.0
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Cannot select a volume in Input lung CT manual #31

Closed zh-zhang1984 closed 2 years ago

zh-zhang1984 commented 2 years ago

Dear auhtors, Thank you for your excellent package for processing lung image; However, when I loaded a series of lung CT in .tiff format, I follow the instruction for "Lung CT Analyzer". I found I cannot select a volume (i.e. when I click on the tool bar, there is no dropdown list). Can you give me some hints to solve this problem?

rbumm commented 2 years ago

Tiff is not a suitable format to retain image geometry. Make sure to save your Tiff volume as nrrd file or better load the data as DICOM files so that you should be able to see the CT volume in the dropdown list. If you run into problems, probably it would be good to ask this question again in the 3D Slicer discourse.  I am closing this issue here.

lassoan commented 2 years ago

TIFF images are probably loaded as color images. You can convert them to scalar volume using Vector to scalar volume module, but I agree with @rbumm that such images should not be used for any image analysis, because it is hard to guarantee that image geometry and quality (e.g., bit depth, value range) are preserved.