Hi. I am trying to select a range of HU to work with my CT images (primarily because I want to visualise trabecular changes of the bone). Is selecting a threshold under “Segment Editor” the same as setting an HU range? Or is there a separate way to set this range. For example., I require an HU range of -150 to +1000. How should I go about doing this? Any help would be appreciated.
The range of values in Segment Editor (and throughout Slicer) is whatever the absorbance values are in your volume - for a micro-CT volume, for example, a 16-bit scan would be 0-65535. For a medical CT scanner, those values would be in Hounsfeld units, so those are the values you would use when setting a threshold.
Hi. Thank you so much for this. So it is my understanding that if I select a Threshold of -150 to +1000 under “Segment Editor” this is the same as setting an HU range of _150 to +1000?
Yes, that is correct.
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Thank you so much! This has been very helpful.
hello Varsha im looking to do same, in mandibular condyle pre post surgery can you please share the way yo do ti ?