Feasibility study of adaptive radiotherapy with Ethos for breast cancer.

Purpose: The aim of this study was to assess the feasibility of online adaptive radiotherapy with Ethos for breast cancer.

Materials And Methods: This retrospective study included 20 breast cancer patients previously treated with TrueBeam. All had undergone breast surgery for different indications (right/left, lumpectomy/mastectomy) and were evenly divided between these four cases, with five extended cone beam computed tomography (CBCT) scans per patient.

Robustness of Breast Margins with Volumetric Modulated Arc Therapy without a Six-Degrees-of-Freedom Couch: A Dosimetric Evaluation.

In our hospital, a TrueBeam linear accelerator and the PerfectPitch 6-degrees-of-freedom (6-DOF) couch (Varian), with 7 mm margins, are used for volumetric modulated arc therapy (VMAT) of breast cancer (BC). This study tested whether a 3-degrees-of-freedom (3-DOF) couch, i.e.