Pelvic Tumor

This study's purpose is the comparison of the automatically segmented 3D model to the reference manual segmentation, based on the Dice precision index. It is implemented by making parents' patients, surgeons and surgical helpers answer specific questions comparing 3D images to usual 2D images of the patient's tumor.

This prospective registry-based trial will include patients with pelvic or thoracic tumors with an indication for radiotherapy treated with oART or IGRT. For the primary endpoint and the secondary clinical endpoints, the trial will compare oART versus IGRT, for technical endpoints the trial will compare the real oART scenario with two virtual (hypothetical) control scenarios. Primary endpoint: * 10% reduction in the rate of acute radiotherapy related toxicity (≥ CTCAE II°, v5.0) using oART Secondary endpoints: * Clinical endpoints: Tumor control, late toxicities compared to conventional irradiated patients, quality of life and patient-reported outcomes * Technical endpoints: Target volume, target coverage, dose to organs at risk, anatomical variability score