Here's wishing you smooth sailing through your CK treatments, Doc.
My advice (as a toastie postie who had CK) in a nutshell: arrive early at your appointments so you can take your anti-anxiety meds early (so they are fully "kicked in" before they start zapping your tumor). If they let you bring music to listen to, choose something nice and soothing, and play it at a low volume so you can hear any communications from the technicians over the intercom (if they use one). (They'll probably periodically let you know how much longer you have to lie there til they're done, etc.) Then, when treatment starts, close your eyes and think about how CK is helping you regain your health. Watching "The Eye" move around your head is kinda freaky (to me, at least), so I just recommend you keep your eyes closed, think positive thoughts and groove to the meds.
CK was a blessing and miraculous for me. You will do great. We'll be thinking of you on Monday.
Wishing you all the best,