lassoan
May 31, 2020, 1:02am
3
You only need to divide the surface area by 2 if you want to measure area of an open surface by creating a very flat closed surface around it (as the closed surface wraps around both sides of the open surface).
For open surface measurements I would no longer recommend creating a closed surface and divide by 2, but instead you have better options, such as:
A. Use closed curve markups:
In recent Slicer Preview Releases, you can draw curves and get their surface area (2D surface, as you would expect - only one side, no thickness).
Select “Closed Curve” from the “Create and place” toolbar button:
[image]
Left-click on the image to place curve control points and right-click to finish placement:
[image]
Measurements on curves are still work in progress, but you can open the Python console (Ctrl-3) and copy-paste the code below to see the surface area:
curves=slicer.util.get…
B. Use cross section area measurement module:
A new module - “Segment cross-section area” - has been added to Slicer. It can compute cross-sectional area of segmented structures along a chosen axis direction. Results are available both as a table and can be shown in a plot, too. Short demo video:
For now, the module is available by installing “Sandbox” extension in the extension manager in a recent 3D Slicer Preview Release.
If you have any comments and suggestions then please post it here.
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