We have just learned that several years ago, some versions of the software used with the Gamma Knife equipment have been recalled due to errors (bugs). This software, called "Leksell GammaPlan", is intended to be used for planning the dosimetry of treatments;  as a result of these bugs, some patients could receive a dose higher or lower than prescribed:

GK Centers are now using Gamma Plan 5.0 and forward, so this represents versions that should no longer be in use.  However, we urge anyone considering GK treatment to ask specifically whether the version of software on the GK machines they will be treated with is not listed in the recall.  To see these recalls for yourself, please go to http://www.fda.gov/bbs/topics/ENFORCE/ENF00563.html   then search for the word "gamma" or just scroll about two-thirds the way down.

Last Edited: Wednesday, October 30, 2002