Standard mammography relies upon two X-ray images of the breast to detect possible areas of concern. Tomosynthesis, on the other hand, utilizes many X-ray images taken from a range of angles to create a three-dimensional image of the breast that can be closely examined a millimeter at a time. This allows radiologists to see more detail and get a much clearer picture of structures within the breast tissue. The appearance of linear structures, radiating lines, and bright spots, which can be indicative of particular breast conditions, is enhanced with tomosynthesis. As a result, practitioners are able to make fewer callbacks for diagnostic procedures while detecting invasive cancers at a higher rate compared with digital mammography alone. This finding is supported by a study published earlier this year in the Journal of the American Medical Association.
C-View is a new breast tomosynthesis technology that allows for quicker procedure times and lower radiation doses than previously possible. It allows practitioners to reconstruct the two-dimensional images taken during tomosynthesis rather than having to take 2-D images in addition to the 3-D mammogram. This lowers both the amount of time a patient must remain still with her breast compressed and the radiation dose needed for the procedure. As a result, C-View reduces the necessary breast compression time from 10 seconds to 4 seconds and the cuts radiation dose delivered during the exam by 40%.
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Resources
[1] Skaane P, Bandos A, Gullien R, et. al. Comparison of Digital Mammography Alone and Digital Mammography Plus Tomosynthesis in a Population-based Screening Program. Radiology. 2013 Apr; 267(1):47-56. Epub 2013 Jan 7.
[2] Philpotts L. et al. Initial Experience With Digital Breast Tomosynthesis in Screening Mammography. Presented at the ARRS 2012, Scientific Session 22 - Breast Imaging: Screening/Emerging Technologies.
[3] Zuley M, Bandos A, Ganott M, et. al. Digital Breast Tomosynthesis versus Supplemental Diagnostic Mammographic Views for Evaluation of Noncalcified Breast Lesions. Radiology. 2013 Jan; 266(1):89-95. Epub 2012 Nov 9.