Hello. I had the Gamma Knife a year ago in March. I had it done at the University. Of Pa., which fortunately only an hour away. I’d travel as far as I would have needed to, to insure the best hospital to have this done. I walked in at 6am. And walked out at 3:30. No side affects. No pain or after affects. The only thing I needed to take care of, is, where screws had to be put into my head in 4 places, to keep my head completely still during the procedure. I had to wear a halo. 6 months after checkup went well. I’m having another contrast MRI in September. The tumor had stopped growing. My surgeon told me that it would keep it from growing and over the years it might eventually shrink. My tumor was 6mm. Good luck.