Abstract: The invention relates to an acoustic phase mask, the phase mask having a variation in the acoustic index n, characterized in that the phase mask comprises a body comprising: at least one matrix formed from a deformable solid material, having a shear modulus of less than 10 MPa, and pores formed in the matrix, the pores being mostly filled with gas, the deformable solid material extending between the pores, the body having a porosity ? less than or equal to 50%, and a controlled porosity ? gradient resulting in a variation of the acoustic index n spatially in the body.

Abstract: Method for reconstruction of a three-dimensional model of a body structure of a subject, said structure comprising a plurality of objects, wherein a database (21) of the structure is provided, the database comprising means to estimate, from a parameter of any object of the structure, another parameter for an object of the structure, a preliminary solution for a first object (L1) is modified to be brought in concordance with subject-specific data (23a, 23b), a reconstruction of the second object (T12) is obtained based on the modified first object and on the database of structure (21).

Abstract: A method of three-dimensionally reconstituting the shape of a singular body in a reference coordinate system and on the basis of initial imaging data acquired by an imaging system of the scanner or MRI type, wherein the method includes the steps of, constituting an approximate three-dimensional model of the singular body on the basis of a parameterizable generic model that is modified as a function of descriptive parameters derived from said initial data, and correcting the approximate model by comparing it (2) with the initial imaging data (D).

Abstract: Method for reconstruction of a three-dimensional model of a body structure of a subject, said structure comprising a plurality of objects, wherein a database (21) of the structure is provided, the database comprising means to estimate, from a parameter of any object of the structure, another parameter for an object of the structure, a preliminary solution for a first object (L1) is modified to be brought in concordance with subject-specific data (23a, 23b), a reconstruction of the second object (T12) is obtained based on the modified first object and on the database of structure (21).