sonografia of the breast is a routine form of checkup. the doctor will first do a manual exam and then, sometimes, a sonografia. it is very simple and goes exactly like sonografia of a pregnant stomach, just going around the breast, showing the state of tissue below. normal private gynecologist would have USG machine because it is used for nearly every vaginal checkup. if she went to a small clinic they probably do not have expensive equipment like this.
mammografia is more similar, in a way, to xray. the breast is squeezed between two plates and then an image is taken. it is done in few dimensions, if i may call it like that. titty will be squished vertically and horizontally, to give better view of what is going on. in comparison sonografia is more superficial.
so maybe someone can give directions for a good gyno who routinely does sonografia as a part of the normal exam?