You may have an ultrasound examination before a mammogram if you are young or presently breastfeeding and find a lump. This is because in these cases the breast tissue is denser and ultrasound will give more information than an x-ray.
What to expect
For this, you will lie on a bed with your breast exposed. The scanner head will be moved over your breast after a contact gel has been applied. At the same time the internal images will appear onto a TV screen and pictures are taken of these.