<qa>  What is the name of the cognitive behavioral technique that is used to treat nightmares?A few controlled studies of the treatment of nightmares have been published, in which behavioral therapy, relaxation techniques, exposure and systematic desensitization have been studied, all of which have shown positive results. But these techniques do not seem to reduce the number of nightmares in patients who suffer from PTSD. These last few years more controlled studies of a cognitive behavioral technique called Imagery Rehearsal Therapy IRT have been published. With IRT patients have to change the script of their nightmares into a different outcome, and rehearse this new script using cognitive imagery a few times a day. 