Posted by
R Heberto Ghezzo, Dr on
Nov 19, 2008; 1:06pm
URL: http://imagej.273.s1.nabble.com/New-plugin-Skeletonize3D-and-AnalyzeSkeleton-tp3694477p3694483.html
Hello All, Ignacio & Gabriel
I typed too fast, what I mean was:
The Length per Volume of a structure in an IUR is estimated by
Lv = 2 Qa i.e. 2 * number of intersections of the structure with the cutting plane.
I work with lung tissue, the triple points in the image are the intersections of
the trihedrals of the alveoli with the cutting plane. If I imagine a very convoluted
line that follows those trihedrals, its length per volume is estimated by the number of triple points.
This measure,[ I think, it is my project] will correlate with the amount of emphysema
[lung destruction and/or alveoli enlargement] better than the usual measure of Lm which is an estimation of "Alveolar Volume"/"Alveolar Wall Area"
Thanks Ignacio, I will try your plugin.
[hidden email]
-----Original Message-----
From: ImageJ Interest Group on behalf of Ignacio Arganda Carreras
Sent: Wed 11/19/2008 5:34 AM
To:
[hidden email]
Subject: Re: New plugin: Skeletonize3D and AnalyzeSkeleton
Hello all!
I just uploaded a new version of the plugin with "triple points"
calculation. I hope it's useful!
Here you are:
http://imagejdocu.tudor.lu/doku.php?id=plugin:analysis:analyzeskeleton:startCheers!
ignacio
Gabriel Landini wrote:
> On Monday 17 November 2008 18:58:49 R Heberto Ghezzo, Dr wrote:
>
>> triple points are the juncture of 3 and only 3 branches ( with a tolerance
>> of 1-2 pixels.) cross over of 2 branches, ie "cuadruple" points are not
>> considered. That was my request to differentiate 'triple points' from
>> 'quadruple' or more points. Thanks
>>
>
> The Lines8 plugin in the latest version of the Morphology collection can
> measure (2D only) skeleton lengths (2 types of lengths) and return the number
> of 1..8 point pixels in multiple skeletons on screen. To do this, one needs
> to select Redirect to: Connectivity
>
>
http://www.dentistry.bham.ac.uk/landinig/software/software.html>
> I cannot understand, however, how can the number of triple points divided by
> the area of the object be a reliable estimate of the skeleton length.
>
> A long skeleton or short without triple points would have a length of 0?
>
> Cheers
>
> Gabriel
>
>
>
>
--
Ignacio Arganda-Carreras
Escuela Politécnica Superior
Laboratorio B-408 Phone: (+34) 91 497 2260
Universidad Autónoma de Madrid
Ctra. de Colmenar Viejo, Km. 15
Madrid 28049, Spain
E-mail:
[hidden email]
Website:
http://www.ii.uam.es/~iarganda