NCI Dictionary of Cancer Terms

The NCI Dictionary of Cancer Terms features 8,354 terms related to cancer and medicine.

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3-dimensional mammography
(3-dih-MEN-shuh-nul ma-MAH-gruh-fee)
A procedure that uses x-rays to take a series of pictures of the inside of the breast from many different angles. A computer is used to make 3-D pictures of the breast from these x-rays. 3-dimensional mammography is used to check for breast cancer and other changes in the breast, such as abnormal lumps, cysts, or calcifications (calcium deposits). It may allow doctors to see breast tissue, including dense breast tissue, more clearly than with 2-D mammography. This may make breast tumors or other changes in the breast easier to find. Also called 3-D mammography and breast tomosynthesis.