So some clinics use these adhesive markers with the that they place on the patient's nipple to mark where it is on the image making it easier to read. My cousin was a bit surprised when they gave her those for her first one (not that the procedure isn't awkward enough as is).
And while the markers will reduce the chances of a call back, be warned:
Everyone dreads the boob squish but it's really no worse than having your blood pressure taken.
But if you have sensitive nipples taking those things off can be downright painful so if the facility uses them, schedule your appointment for a time where you can take a hot shower afterward (and let them fall off in there).
What Girls Said
I wouldn't care it