Mammography, which is an X-ray of the breast tissue, is a technology that has been available since the 1950s.

CNN: Should I get a mammogram?

The technique can provide excellent, detailed images of the body's soft tissue and is an alternative to using X-ray techniques such as computed tomography (CT).

BBC: Study into health impact of MRI

Traditional X-ray film too often does not detect small, early cancers, especially in breasts with dense tissue.

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