@poodlemomfour, I can understand you're afraid. CyberKnife is the name of the machine or device that delivers stereotactic radiosurgery (SRS). Gamma Knife is another name. While the words surgery and knife are used, the treatment doesn't involve any cuts or incisions. "tiny beams of radiation on a tumor or other target with extreme accuracy. Each beam has very little effect on the brain tissue it passes through. But a strong dose of radiation is delivered to the place where all the beams meet. The ability to deliver radiation so precisely means that very little radiation gets to healthy tissues surrounding the target." https://www.mayoclinic.org/tests-procedures/brain-stereotactic-radiosurgery/about/pac-20384679

Here are some related discussions that you might find helpful.

- Stereotactic Radiosurgery Surgery (Gamma or CyberKnife) for Meningioma https://connect.mayoclinic.org/discussion/gamma-knife-radio-surgery-for-meningioma/
- I've survived three brain tumors, one treated with cyberknife https://connect.mayoclinic.org/discussion/ive-survived-three-brain-tumors-only-one-malignant-one-done-with-cyberknife/

You mention that you are claustrophobic. Please let your care team know. They can help make the treatment easier for you.

When will you have treatment?