Don't inadvertantly get cancer by running to have a mammogram every time your OB-GYN tells you to. He or she may not have read their medical journals or even major publications which have now revealed that mammograms do more to cause cancer than they do to prevent it. Just do a search on any search engine for "dangers of mammograms" to get the facts. They have 1000 times the amount of radiation as a simple chest x-ray. Here is one site of many with the truth about mammograms.
A completely safe and much more reliable alternative is a Thermogram.

http://drbenkim.com/articles-mammograms.html