GIANT STICKERS/X marks for radiation to chest wall & supraclav nodes...

[jml]

For all the treatment & surgeries that have come my way on this journey, I've never had Radiation before...
Well, that's all about to change.
PET scans are showing increased activity in a couple of supraclav nodes (1st recurrence to supraclav nodes was last October, chemo'd thru Feb, & 2 NED f/u scans, but now this...)
So instead of chemo, we feel like Rads are a good option.

I had my 1st consult w/the RadOnc (&his dreadful new Resident) last week, then went for my 1st CT/Sim visit.
What a disaster!
I asked repeatedly, "So, what exactly are we doing today?" I asked for more explanation about how radiation reaches the entire chest wall (I thought it was very point specific), would it create problems for my reconstructed tissue/implant?what about radiation spray damaging my teeth?
These are all pertinent, reasonable questions, right?
Unfortunately, I don't feel like I got sufficient information/explanations.
The most annoying part of the whole experience is that in addition to the lack of info, I felt like I was being man-handled - lying on a CT table, arms over my head, strangers opening my gown (including a young male tech-i know, it his job, he sees tons of boobs every day...I, however, don't show mine to strangers, every day) then putting stickers & marking my body.
Mind you, I couldn't feel what they were doing since I don't have FEELING on the L side of my chest!
Imagine my surprise when I stood up, saw the 7 stickers (the size of round bandaids) with big sharpie X's that extend beyond the sticker on my body!
Imagine how pissed I was when I put my sundress back on & discovered that my dress didn't cover the giant stickers w/Giant sharpie X's.
And to add insult to injury, the young, arrogant 2 week old Resident had the audacity to chastise me & say "Jessica, it's not unreasonable for us to mark you for your treatment."
WHAT??
All the other radiation "tatoos" I've seen are these tiny little marks, practically little specks that look like little moles...
What's up with these stickers w/GIANT Sharpie X's?

Help!
Someone please explain & enlighten me!

I feel so naive!