The object - test, using this object - test which makes it possible to monitor the coincidence of the fields of light and of the fields irradiated on an apparatus for processing by radiotherapy

摘要

The present invention relates to an object - test (1; 100) for a test for checking the quality of an apparatus for the treatment with radiotherapy (6), consisting of a body (2, 102) of the electron density d2 and of at least one element (5, 105a, 105b) integrated on a surface of the body, or embedded in that - latter and adapted to be distinguished from the body for imaging by bundles of ionizing radiation, the body also comprises a base surface on which it rests in use and of the alignment means (3, 103) on an edge of a light beam emitted by the apparatus of treatment with radiotherapy (6), the body being intended to be placed in such a way that the at least one element is in the irradiation beam, characterized by the fact that the body is a body and that said alignment means (3, 103) are spaced apart of said element or elements (5, 105a, 105b), so that, in the plane of the base surface of the body (2, 102), the orthogonal projection of the alignment means (3, 103) and the orthogonal projection of the said element (5, 105a, 105b) are spaced apart by a predetermined distance h.