EP-1443 Real-time tumor tracking in pancreatic SBRT by percutaneous US-guide implantation of transponders. (April 2019) - Martinez, J.F. Castilla; Chicas-Sett, R.; Godoy, J.; Hernandez, C.; Morales-Orue, I.; Zajac, M.; Zafra, J.; Lloret, M.; Lara, P.C.