The iTOP (IMAGE) DOE/Pacific Northwest National Laboratory Caption PNNL scientist James Fast (second from right) and colleagues check one of the 16 quartz components or "planks" of the imaging Time of Propagation detector. Each plank is perfectly polished on all six sides to maximize light collection and propagation. Credit Photo courtesy of James Fast/PNNL Usage Restrictions With credit: Photo courtesy of James Fast/PNNL 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.