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Re: "Lost" Plateosaurus vertebra discovered in Germany using CT scan and 3-D printer



From: Ben Creisler
bcreisler@gmail.com


After some additional checking, here's the full ref and abstract for
the article:

René Schilling, Benjamin Jastram, Oliver Wings, Daniela Schwarz-Wings
& Ahi Sema Issever (2013)
Reviving the Dinosaur: Virtual Reconstruction and Three-dimensional
Printing of a Dinosaur Vertebra.
Radiology (ahead of print)
doi:10.1148/radiol.13130666
http://pubs.rsna.org/doi/abs/10.1148/radiol.13130666


Purpose
To demonstrate the feasibility of using computed tomography (CT) to
confirm the identity of an unprepared fossil and to use the CT dataset
to separate the fossilized bone from its surrounding sediment matrix
and produce a three-dimensional (3D) print.

Materials and Methods
The examined object was a plaster jacket containing an unprepared
fossil. CT was performed with a 320-section multidetector unit. A
marching cube–based method was used to transform the voxel CT dataset
into triangle-based, editable geometry. Then, a comprehensive
postprocessing step was performed to isolate the geometry of the
vertebra from its surrounding fossilized matrix. Finally, the
resulting polygon mesh describing only the vertebra was used for a
physical 3D reconstruction by using a selective laser sintering
machine.

Results
The CT examination provided enough data to assign the fossil to the
genus Plateosaurus. In addition, much valuable information about the
fossil has been gained—in particular the visualization of multiple
fractures and the destruction of the anterior rim of the vertebral
body. Finally, the results show that the 3D print generated, including
the fractures and the anterior destruction, may be considered an
accurate copy of the bone with the unprepared fossil.

Conclusion
The authors demonstrated the feasibility and potential utility of
combining CT with 3D printing, providing a nondestructive method to
future paleontologists.


On Wed, Nov 20, 2013 at 9:22 AM, Ben Creisler <bcreisler@gmail.com> wrote:
> From: Ben Creisler
> bcreisler@gmail.com
>
> A number of news and blog items about a paper that does not appear to
> be available yet.
>
>
>
> http://www.azom.com/article.aspx?ArticleID=10338
>
> http://www.livescience.com/41350-dinosaur-bone-3d-printed.html
>
> http://www.nbcnews.com/science/hidden-dinosaur-fossil-re-created-x-ray-scanner-3-d-2D11624201
>
>
>
> In German:
>
> http://www.zeit.de/wissen/geschichte/2013-11/dinosaurier-3d-drucker-knochen
>
> ===
>
> I checked the journal site but the paper apparently has not been
> posted yet (like in advance of print).
>
> http://pubs.rsna.org/journal/radiology