Hello Im a new slicer user, kindly enlighten me. How can measure distances between two structure ( like measuring the length of a tooth on a CT scan)? Can someone please provide a link to the tutorial for the same. The documentation provided is too difficult to understand. Is there a module that…

Yes, there is a ruler tool to do exactly what you want to do: https://www.slicer.org/wiki/Documentation/4.8/Modules/Annotations [image]

Measurement/ ruler in 4.8

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