EP-1970: Hybrid-IMRT as an optimal class solution for whole breast planning with boost to lumpectomy area
Savino Cilla, F. Deodato, Anna Ianiro, Mariangela Boccardi, Pietro Viola, Maurizio Craus, M. Romanella, Igor Djan, Milly Buwenge, Rezarta Frakulli, GIAMBATTISTA SIEPE, ALESSANDRA ARCELLI, Silvia CAMMELLI, Daniela Smaniotto, Giovanni Piero Frezza, Vincenzo Valentini, ALESSIO GIUSEPPE MORGANTI, Gabriella Macchia · Radiotherapy and Oncology · 2018
ConclusionDuring the process of hippocampus sparing, HAR_Dmean decreased linearly as well.However, dosimetry variation of PTV presented three different regions: plateau region (> 20Gy), gradient region (~20 to ~10Gy) and falling region (<10Gy).There's almost no significant impact on the PTV dosimetry factors when hippo_Dmean was not lower than 15Gy.With the hippocampus dose decreasing, CI decreased linearly and slightly, however, HI was impaired severely in the falling region.Plan delivery duration time was significantly prolonged during the hippocampus sparing process (from 13min to 23 min).