Dosimetric comparison of VitalBeam and Halcyon 2.0 for hypofractionated VMAT with simultaneous integrated boost treatment of early-stage left-sided breast cancer.

Purpose: This study compared the quality of treatment plans for early-stage, left-sided breast cancer, as planned for and delivered by the Halcyon and VitalBeam .

Materials And Methods: Fifteen patients diagnosed with early-stage left-sided breast cancer, who had received VMAT with hypofractionated SIB, were recruited. All cases were planned using Halcyon comprising a dual-layer MLC (DL-MLC) and VitalBeam with a Millennium 120 MLC (VB-MLC).

Customized 3D Bolus Applied to the Oral Cavity and Supraclavicular Area for Head and Neck Cancer.

Background/aim: In this study, a new method to create a customized three-dimensional (3D) bolus by accurately considering the anatomy of an individual patient is demonstrated.

Patients And Methods: A 3D bolus structure was created from an extended planning target volume (PTV) to reduce an inevitable skin reaction. In addition, during computed tomography simulation in patients with oral cavity cancers, a balloon was inserted into the mouth of a patient to secure space, and then the area surrounding the balloon was designed into a 3D bolus structure.