I was treated two days ago for acoustic neuroma, using gamma knife. I must say it was probably the best medical procedure I have ever had. My nurses, and doctors were pleasant, kind, and understanding. The only area I see for improvement was during the headframe installation. I understand that the facility I went to usually gives patients a small dose of phentenayl, in addition to the numbing injections. I am unable to take phentenayl, so we proceeded without it. As the frame was tightened, it felt as if it would be impossible to take the tightness for 2-3 hours. This caused me to have a small, short panic attack, until I felt that extreme tightness leave. I wish they would've explained that the tight feeling would only last a very short time. My treatment went great and I couldn't be happier, I have wondered if anyone else felt this way during headframe installation?