Dartmouth Engineering Surgical Margin Probe (IMAGE) Thayer School of Engineering at Dartmouth Caption Small enough to be integrated with a minimally-invasive surgical probe, the device senses differences in the flow of electric current through cancer cells for real-time assessment of the surgical margin (whether positive or negative for cancer). Pictured is the electrode array embedded in the probe tip. Credit Dartmouth Engineering Usage Restrictions Please contact Dartmouth Engineering License Licensed 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.