Comparison of dose distributions calculated by the cyberknife Monte Carlo and ray tracing algorithms for lung tumors: a phantom studyCanan Koksal, Ugur Akbas, Murat Okutan, Bayram Demir and Ismail Hakki SarpunEPJ Web of Conferences, 100 (2015) 03003DOI: https://doi.org/10.1051/epjconf/201510003003