Based on advances in both screening and diagnostic imaging outcomes, digital breast tomosynthesis (DBT) is becoming the standard of care for breast imaging. The increased information received from the tomosynthesis capture reduces the overlapping tissue effect, allowing for better lesion diagnosis, characterisation, and location. Furthermore, the quasi three-dimensional information received from the rebuilt DBT data set allows for a more efficient imaging work-up than two-dimensional full-field digital mammography alone.
Digital breast tomosynthesis equipment acquires multiple 2D digital images using a traditional X-ray source that sweeps around the breast in an arc. Breast compression is done using the same instrument and method that is used for digital mammography. The process of obtaining each digital view takes less than 20 seconds. One of the benefits of DBT is that pictures may be obtained right after the digital mammography. Computational methods, like MRI, synthesis the 2D digital pictures to generate tomograms (or slices), which allow for a 3D reconstruction of the breast. Individual tomograms can be seen (much like improved conventional mammography) or in a dynamic movie format.
While digital breast tomosynthesis equipment is quickly becoming commonplace in clinical practise, it's unclear whether the advantages are the same for women of all ages. In order to maximise benefits and avoid risk for older women, the implications of new technologies used to test for breast cancer at the population level must be studied before extensive distribution.
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