JOHN GREIM / SCIENCE PHOTO LIBRARY JOHN GREIM / SCIENCE PHOTO LIBRARY
Mammography. View of a woman undergoing breast screening. Mammography is an X- ray technique which reveals fine details of internal breast tissues. An image is obtained by compressing the breast into a relatively flat plane between two plastic sheets. Breast tissue is then exposed to X-rays to produce a mammogram. The major use of mammography is in the detection of breast cancer, since the appearance of cancers on a mammogram differs from that of benign conditions such as cysts. Small tumours detected at an early stage may sometimes be treated in a conservative manner without resort to major breast surgery (mastectomy).
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