Abstract: A method and a system are provided for helping to guide an endovascular tool in vascular structures. The method includes an initial planning phase in which a first three-dimensional anatomical model specific to the patient is determined from an acquired three-dimensional image, and an intervention phase in which a final transformation, which is a combination of a rigid transformation and of an elastic transformation, is applied to the first three-dimensional anatomical model specific to the patient in order to obtain a second three-dimensional model specific to the patient. The rigid transformation is estimated between the preoperative three-dimensional image and one or more perioperative two-dimensional images of perioperative two-dimensional images, and the elastic transformation is calculated as a function of a simulation of vascular deformations that are induced by introducing the tool into the target vascular structure.

Abstract: A method and a system are provided for helping to guide an endovascular tool in vascular structures. The method includes an initial planning phase in which a first three-dimensional anatomical model specific to the patient is determined from an acquired three-dimensional image, and an intervention phase in which a final transformation, which is a combination of a rigid transformation and of an elastic transformation, is applied to the first three-dimensional anatomical model specific to the patient in order to obtain a second three-dimensional model specific to the patient. The rigid transformation is estimated between the preoperative three-dimensional image and one or more perioperative two-dimensional images of perioperative two-dimensional images, and the elastic transformation is calculated as a function of a simulation of vascular deformations that are induced by introducing the tool into the target vascular structure.

Abstract: A method is provided for evaluating a procedure for determining an aggregate radiotherapy dose received in the course of a radiotherapy treatment. The method includes: defining a deformable model of at least one organ to be treated and of at least one neighboring organ, generating a series of simulated images, interpretable by the procedure to be evaluated, with aid of the model; comparing the aggregate dose calculated by the procedure to be evaluated, applied to at least one of the simulated images, with a reference aggregate dose, so as to deliver at least one item of information representative of the quality of the procedure, the reference aggregate dose being obtained by taking into account anatomical deformations applied to the organs, so as to determine a reference dose actually received at each treatment session by the organs, as a function of their actual shape and/or actual position during this session.

Abstract: A method is provided for evaluating a procedure for determining an aggregate radiotherapy dose received in the course of a radiotherapy treatment. The method includes: defining a deformable model of at least one organ to be treated and of at least one neighboring organ, generating a series of simulated images, interpretable by the procedure to be evaluated, with aid of the model; comparing the aggregate dose calculated by the procedure to be evaluated, applied to at least one of the simulated images, with a reference aggregate dose, so as to deliver at least one item of information representative of the quality of the procedure, the reference aggregate dose being obtained by taking into account anatomical deformations applied to the organs, so as to determine a reference dose actually received at each treatment session by the organs, as a function of their actual shape and/or actual position during this session.