Successful treatment of breast cancer typically requires surgical removal of the tumor. Optical coherence tomography (OCT) has been previously developed for real-time imaging of the surgical margin. However, it can be difficult to distinguish between normal stromal tissue and cancer tissue based on scattering intensity and structure alone. Polarization-sensitive optical coherence tomography (PS-OCT) is sensitive to form birefringence of biological tissue. We report on the development of a high-speed PS-OCT system and imaging of ex vivo human breast tissue, showing enhanced contrast between healthy and cancerous tissues based upon collagen content confirmed with corresponding histology. These results demonstrate the feasibility of using PS-OCT to supplement structural OCT as a possible method for intraoperative tumor margin evaluation. References and links 1. American Cancer Society, Breast Cancer Facts & Figs. 2013 (American Cancer Society, Atlanta, GA, 2013. 2. B. Fisher, S. Anderson, J. Bryant, R. G. Margolese, M. Deutsch, E. R. Fisher, J.-H. Jeong, and N. Wolmark, "Twenty-year follow-up of a randomized trial comparing total mastectomy, lumpectomy, and lumpectomy plus irradiation for the treatment of invasive breast cancer," N. Engl. J. Med. 347(16), 1233-1241 (2002). 3. U. Veronesi, N. Cascinelli, L. Mariani, M. Greco, R. Saccozzi, A. Luini, M. Aguilar, and E. Marubini, "Twentyyear follow-up of a randomized study comparing breast-conserving surgery with radical mastectomy for early breast cancer," N. Engl. J. Med. 347(16), 1227-1232 (2002). 4. P. Ananthakrishnan, F. L. Balci, and J. P. Crowe, "Optimizing surgical margins in breast conservation," Int. J. Surg. Oncol. 2012, 585670 (2012 J. Keely, "Aligned collagen is a prognostic signature for survival in human breast carcinoma," Am.
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