Three Cones (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption How a gamma-ray camera constructs an image: when any three gamma-ray photons are absorbed in a segmented germanium detector, their source can be found by calculating all possible directions, mapped as the surfaces of cones, from which each photon may have arrived. The source γ lies at the point where all three cones intersect. Credit Lawrence Berkeley National Laboratory and Lawrence Livermore National Laboratory Usage Restrictions None 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.