%0 Journal Article %T On the use of EPID-based implanted marker tracking for 4D radiotherapy %A Keall, P. J. %A Todor, A. D. %A Vedam, S. S. %A Bartee, C. L. %A Siebers, J. V. %A Kini, V. R. %A Mohan, R. %J Medical Physics %V 31 %N 12 %P 3492-3499 %@ 0094-2405 %D 2004-12-01 %I American Association of Physicists in Medicine %~ DeepDyve