I don't know how new this technology is, but the images on this site, appear very impressive:
But that's not why I'm posting, from the description:
A license from AntiCancer Incorporated, 7917 Ostrow St., San Diego, CA 92111 and/or Xenogen Corporation, 860 Atlantic Avenue, Alameda, California 94501, may be required to practice imaging, within animals, of cells genetically engineered to produce light-emitting compounds.
While the equipment manufacturer is probably just alerting users to the situation it does open some questions:
* are the patents refered to really this broad
* can the patents be defended?
* can anyone afford to challenge them?
I've not looked into the details but from a first glance at the above post it looks as if someone's trying to profit from the obvious - and might well end up holding back academic / commercial research in the process.