The Gamma Knife procedure was one of the options, but I think because of the placement of my tumor, they felt the conventional radiation would be better; less radiation at a time and hopefully no side effects or very little. I am not sure why radiation wasn't done to begin with - maybe because my tumor was a Grade 2 and not Grade 3. I am so happy it went well for you! They made a mask for me to wear each time and that gets connect to a head form they made to fit the back of my head and then the face mask gets attached to that. The goal for mine is to stop the growth. Shrinking of the tumor most likely won't happen. The doctor doing my treatment plan seems very knowledgeable, so I am comfortable with him. Best wishes for no future growth!