[Organization and prerequisites for the delegation of dosimetry tasks]

The planning of irradiation treatments is a task of medical physics, based on the appropriate calculations of a dose distribution from radiation beams, virtually set up on a simulation software. This task is at the centre of the chain of treatment preparation: between the contouring phase and the objective definition, which are specialties of the radiation oncologist, and the joint validation of the treatment plan by the physician and the physicist. Historically, this task has been performed by the medical physicist, but can be delegated to other professionals, especially radiation technologists. The evolution of the techniques and procedures tends to a specialization of the skilled workers toward this new work of dosimetry specialist or treatment planning technician. In this paper, the training, relational and organizational aspects will be described to explain how the delegation of the tasks, in the context of treatment plan preparation between professionals can be set up with the highest level of quality and security for the patient treatment and with the respect of legal obligations and requirements of each profession.