Experimental setup (IMAGE) Optica Caption Researchers have developed a low-cost, simple imaging system that uses LEDs and a CMOS camera to determine the depth of tumor cells in the body. The portable system could eventually be used during surgery to distinguish between healthy and cancerous tissue when removing a tumor. 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.