Abstract: Collimation device for an X-ray detection system, the collimation device comprising: a collimator comprising a substantially planar support made of a material with partial or zero radiotransparency, the support being rotatably movable about an axis of rotation (?) which passes through the support and which is perpendicular to a first face of the support which acts as an X-ray plane of incidence referred to as the main plane of the support (P), the support (D) being provided on the first face with a slit which is completely transparent to X-rays and which is configured to generate an X-ray flow when the collimator is exposed to an X-ray source, the slit extending longitudinally in the main plane of the support along an axis located at a non-zero distance (d) from the axis of rotation (?), the slit extending through the entire thickness of the support.

Abstract: Collimation device for an X-ray detection system, the collimation device comprising: a collimator comprising a substantially planar support made of a material with partial or zero radiotransparency, the support being rotatably movable about an axis of rotation (?) which passes through the support and which is perpendicular to a first face of the support which acts as an X-ray plane of incidence referred to as the main plane of the support (P), the support (D) being provided on the first face with a slit which is completely transparent to X-rays and which is configured to generate an X-ray flow when the collimator is exposed to an X-ray source, the slit extending longitudinally in the main plane of the support along an axis located at a non-zero distance (d) from the axis of rotation (?), the slit extending through the entire thickness of the support.

Abstract: A multilayer scintillation detector, includes at least three layers superposed on one another, and each extending parallel to a plane, called the detection plane, wherein each layer is formed by a first material, called a scintillation material, capable of interacting with an ionizing radiation and of forming, following the interaction, a scintillation light in a scintillation spectral band; each layer has a plurality of light guides, respectively extending parallel to the detection plane, according to a length, the light guides being disposed, over all or part of their length, parallel to an axis of orientation; the axis of orientation of the light guides of each layer is oriented, in the detection plane, according to an orientation, the orientations of the respective axes of orientation of at least three layers being different from one another, such that each layer has an associated orientation; and the scintillation material has a first refractive index.

Abstract: The invention relates to a method for characterising the quality of an X-ray beam having a known profile for depositing a dose in a body, having an zone (Za1, Za2) of increasing dose rate inside said body extending between the input surface of the beam and a characteristic depth (Pmax) where the deposited dose is at a maximum, the method comprising the following steps: —providing a monolithic detector including in p-n junctions (m>3) stacked depth-wise in the detector with at least three junctions distributed in the zone of increasing dose rate; —projecting said X-ray beam onto the monolithic detector; —recovering the m signals (r) delivered by the p-n junctions of the detector; —and processing the m signals (r) in order to characterise the quality of the X-ray beam.

Abstract: A device for in vivo dosimetry, the device comprising: a miniature probe (1) comprising at least: a radioluminescent material (3) that emits a radioluminescence signal of intensity that is a function of the high-energy radiation irradiating said material; and an optical fiber (4, 16) receiving the luminescence signal and conveying it to a luminescence detector system (14); and a luminescence detector system (14); the device being characterized in that the radioluminescent material (3) is gallium nitride (GaN) that emits a luminescence signal at least in a narrow band BE, and in that the luminescence detector system (14) includes an optical device (18) enabling the narrow emission band of gallium nitride to be selected.