Despite improved surgical techniques, the reported rate of positive surgical margins (PSM) after robotic-assisted laparoscopic prostatectomy remains as high as 20-40%. These PSM are associated with disease progression after surgery and should be avoided. Currently, there is no technique available to detect PSM intraoperatively. Diffuse Reflectance Spectroscopy (DRS) is proposed as a technique to detect tumor tissue at the surgical resection margin, intraoperatively. Over 800 measurements were performed on the prostate surface and, to mimic a PSM, on the cleaved prostate surface. A machine learning-based classification model was able to discriminate healthy tissue from tumor tissue with sufficient accuracy.
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