Cell Organisation: Voronoi, Spatial Point Patterns

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I am just starting to learn about the different ways cell organisation
("cellular sociology") can be assessed. Two questions:

1) Is there a (shareware/freeware) Macintosh program able to make Voronoi
diagrams and minimal spanning trees from TIFF images of cells and/or from
(x,y) coordinates of cell positions?

2) Is there anyone currently analysing cell-to-cell organisation (using
Voronoi, Delaunay, Gabriel etc...) using the NIH Image software?

Thanks in advance.

Clint Young
Department of Psychiatry
University of British Columbia

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CD ROM Vol 2 was produced by staff at the Purdue University Cytometry Laboratories and distributed free of charge as an educational service to the cytometry community. If you have any comments please direct them to Dr. J. Paul Robinson, Professor & Director, PUCL, Purdue University, West Lafayette, IN 47907. Phone:(317) 494-0757; FAX (317) 494-0517; Web http://www.cyto.purdue.edu EMAIL robinson@flowcyt.cyto.purdue.edu