Comparison of 3DCRT,VMAT and IMRT techniques in metastatic vertebra radiotherapy: A phantom StudySonay Gedik, Sema Tunc, Arda Kahraman, Sibel Kahraman Cetintas and Meral KurtEPJ Web Conf., 154 (2017) 01008DOI: https://doi.org/10.1051/epjconf/201715401008