Geometric and dosimetric analysis of CT- and MR-based automatic contouring for the EPTN contouring atlas in neuro-oncology.

Purpose: Atlas-based and deep-learning contouring (DLC) are methods for automatic segmentation of organs-at-risk (OARs). The European Particle Therapy Network (EPTN) published a consensus-based atlas for delineation of OARs in neuro-oncology. In this study, geometric and dosimetric evaluation of automatically-segmented neuro-oncological OARs was performed using CT- and MR-models following the EPTN-contouring atlas.

Development of explanatory movies for the delineation of new organs at risk in neuro-oncology.

Ten new organs at risk (OARs) were recently introduced in the updated European Particle Therapy Network neurological contouring atlas. Despite the use of the illustrated atlas and descriptive text, interindividual contouring variations may persist. To further facilitate the contouring of these OARs, educational films were developed and published on www.

Palliative chest irradiation in sitting position in patients with bulky advanced lung cancer.

Some patients with bulky advanced lung cancer are not able to lie down because of dyspnea. We therefore designed a technique for irradiation in a sitting position by using a dedicated chair. The reproducibility of the sitting position was high and all ten patients preferred this position over lying down.