[JagMicker]

My biggest concern is regarding the internal software and dosimetry controls. Could there be a fault condition that would result in unintended levels of ionizing radiation? It wouldn't be the first such accident..

http://bjr.birjournals.org/content/78/934/913.full

http://www-pub.iaea.org/MTCD/publications/PDF/Pub1207_web.pd...

[Wingman4l7]

...And the Therac-25 / airport scanner comparison comes full circle: http://news.ycombinator.com/item?id=4919666 =)