It was published online in the Journal "Radiology" March 12, 2013.
This is the link to view the abstract if you are interested:
http://radiology.rsna.org/content/ea...22542.abstract
I have access to the journal through my university, but it doesn't seem to allow me to access the "online first" full text article, so it looks like I'll have to wait until its out in print to read it in full.