I'm not really sure. As I said, it was the first time I heard of it and am also trying to find out more about it... I think it is actually a separate technique, that was used in combination with reiki. The first time, I received the session so I really couldn't see what she was doing, but later I saw the practitioner giving it to someone else while I gave them 1st level reiki.
It looks similar to reiki (to my eyes at least), but the practitioner is repeating mantras during the whole session.
I was just reading something here
www.reikithehealingpath.com/medicine_buddha_reiki.htm