Greetings Joao,
 
The following bit of information may be helpful to you. I am however, in no
way related to this faq, I  am just passing the info on to you...
 
>Summary: List of software packages, user's notes, references and other
>         information relating to medical volume visualization and imaging.
>
>alt.image.medical
>comp.graphics.visualization
>comp.sys.mac.scitech
>sci.image.processing
>sci.med.radiology
>sci.techniques.mag-resonance
>alt.answers
>comp.answers
>sci.answers
>news.answers
>
>Archive-name: medical-image-faq/volume-visualization
>Posting-Frequency: monthly
>
>med-volviz-faq-95-01
>====================
>
>The following is a list of software packages, user's notes and other
>information relating to medical volume visualization and imaging that I
>have collected over the past from Usenet newsgroups, mailing lists, www
>and other places. Many thanks to V.C. Arun Kumar and Lance Ladic for their
>lists on 3D visualization software. I have NOT tried all of the packages
>mentioned in this list, and therefore cannot attest to the quality of some
>of them. Please let me know if I have misquoted someone's posting and if
>you wish to make corrections and additions to the faq. Also send me a note
>if some of the text is out of date or too far off-topic as I don't want
>the faq to grow too much with irrelevant info.
>
>I would be interested to hear other user's experiences concerning 2D and
>3D-reconstruction of CT, MRI and US-data.
>
>This file is formatted as ~setext~. For more information on setext, the
>structure-enhanced text format send email to <[log in to unmask]>. A file
>will be returned shortly. Setext viewers for Mac, DOS/Windows and UNIX can
>be found at <ftp://ftp.bilkent.edu.tr/pub/Local/setext/>.
>
>This file is also available at:
>
><ftp://rtfm.mit.edu
>/pub/usenet-by-group/news.answers/medical-image-faq/volume-visualization>
>
>Matti Haveri <[log in to unmask]>
>Oulu university central hospital
>Department of diagnostic radiology
 
Hope this helps...
Paul