Not only what everyone says in all of the above, if this is your first one, don't forget that they have no baseline levels established to compare to. This would be especially difficult with dense breast tissue which looks like a snowfield in the imaging. I've seen mine and it's nearly pure white. Like others, I have dense tissue as well and have had a callback in the beginning when I had no baseline. Even now, I am on a 6 month watch for 2 years on the right one and am having an ultrasound on the left one next week. It's sometimes difficult to determine and see even with many years of imaging, if the tissue is that dense.