Two monitors are used

Two monitors that are watching Rob during the proton radiation treatments

The proton radiation treatments are monitored from a short distance. No one wants to be in the same room as the patient (for safety and health reasons) during the actual radiation treatment.

The patient (me) is watched for panic in the left monitor (as well I have a panic button in my hand once I am positioned into place and the mask is set) and in the right monitor my right pupil is seen enlarged. Should my vision move outside of the allowed areas, as seen from the marks on the pupil monitor, the treatment will be immediately stopped so as not to send the proton beams to an area that is not the tumor.