Tissue Sample (IMAGE) Optica Caption A lumpectomy sample is imaged using the dual wavelength excitation fluorescence imaging system. The system might eventually be used in the operating room to guide surgeons on when it is necessary to remove additional tissue. Credit Christine M. O’Brien, Washington University in St. Louis Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.