Re: IMAGEJ Digest - 5 Jun 2011 to 6 Jun 2011 (#2011-153)

[Alessandro Zivelonghi]

Hi All,

I need to calculate the porosity of a 3D region of interest of a tomographic
stack.
The ROI is a section of a cone (upper diameter < lower diameter,
axissymmetric).
Segmentation is fine.
How to calculate the volume fraction of pores sparse in the conical ROI ?
Is there a plugin for selecting non-standrard 3D ROI?

many thanks,
regards,
Alex


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Alessandro Zivelonghi

Max-Planck-Institut für Plasmaphysik
Materials Research Division

Boltzmannstr. 2, 85748 Garching b. München, Germany

http://www.ipp.mpg.de/eng/index.html

phone: [phone]
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[Michael Doube-3]

Hi Alessandro,

> How to calculate the volume fraction of pores sparse in the conical ROI ?
> Is there a plugin for selecting non-standrard 3D ROI?

Volume Fraction in BoneJ handles irregular ROIs but these have to be
defined by a series of 2D ROIs stored in the ROI manager.  So, you would
have to store a set of ellipses (right?) that define your 3D ROI.

http://bonej.org/volumefraction

Michael