EP-1490: Accuracy results from the first clinical trial of a new real-time IGRT system, Kilovoltage Intrafraction Monitoring. (April 2015) - Keall, P.J.; Ng, J.A.; Huang, C.Y.; Colvill, E.; Poulsen, P.R.; Simpson, E.; Kneebone, A.; Eade, T.; Booth, J.T.