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Diagnostic Mammograms
When a mammogram is used to detect cancer in women before they have any signs or symptoms of the disease, is it called a screening mammogram. Screening mammograms consist of two images of each breast, and detect lumps or other abnormalities.
Diagnostic mammograms are used after a lump or other symptoms of the disease have been found. It is also used if it is difficult to see breast tissue in a screening mammogram due to certain circumstances, such as the presence of breast implants. Diagnostic mammography consists of more x-rays than screening mammography and therefore takes longer to complete.
Women should begin scheduling their annual mammograms at the age of 40.
To learn more about mammograms, watch the video below:
Reference
Video from: About.com