摘要:
The present invention relates to a method for aligning an object, whose image is to be recorded, with an image capture apparatus and a coupling eyepiece. Said method consists in using a light source, said light source being positioned in the place of the object and emitting luminous dots through a mask and through the coupling eyepiece towards the capture apparatus. The invention also consists in verifying whether the images of said luminous dots are split into two on the image plane, then, using all the development functions determined for the various alignment settings, in determining a particular setting in which the distances between the images of the luminous dots are minimal.
摘要:
The invention relates to a tomosynthesis method by illuminating an object by means of an X-ray source (1) with a linear trajectory (2), the method comprising breaking down a volume of the object into N fanned out planes (P) formed between the linear trajectory (2) and a detecting plane (4) parallel to the linear trajectory, each fanned out plane of said N planes includes the linear trajectory; and performing anisotropic regularization on at least one fanned out plane (P).
摘要:
A screen panel for converting X-rays into light photons includes a rigid foam plate (2), a first layer (1) of composite material located on one face of the rigid foam plate (2) and a second layer (3) of composite material located on the other face of the rigid foam plate, parallel to the first face. The screen panel applies, for example, to medical radiology and to non-destructive testing of nuclear waste storage packages.
摘要:
The invention relates to a process for the registration of two different images of the same object consisting of breaking down each of the images into space components representing the distribution of the grey levels of the image, applying a phase registration method to the components to bring about a correspondence between the components of one image with those of the other image, summating all the results of the bringing into correspondence and detecting, in the image resulting from said sum, the maximum grey level defining the transformation between the two initial images.
摘要:
The present invention relates to a system for determining the alignment of an object, whose image is to be recorded, with a coupling eyepiece and an image capture apparatus that defines an image plane (Pi), comprising: an image capture apparatus (2) equipped with the ability for adjusting its own position; a light source (1) that emits at least two non-focused luminous dots (1a, 1b); eyepiece coupling lens(es) or element(s) (3) that focus on an object plane (Po); an opaque mask (4) that is perforated with at least two holes (5a, 5b) and that is positioned in front of light source (1) such that it transmits at least part of the light emitted by the light source; and calculating mechanism for determining whether alignment exists and, in the case of non-alignment, for quantifying the non-alignment.
摘要:
The invention relates to a method for correcting image defects from a matrix-type X or &ggr;-ray detector, consisting in producing a confidence map on the basis of continuous confidence ratings, between 0 and 1, and representing the level of confidence assigned to each detector pixel. It then consists in using this confidence map to correct the defects of the matrix detector.
摘要:
The cameras (10) of this X-ray detector are all mounted on a common rigid plate (1) by a surface support and screwed to ensure their optical distance from a scintillator (7) itself mounted on the plate (1) by an enclosure (6) forming a darkroom (8). The common mounting of the principal elements of the detector on a single rigid plate thus significantly reduces image deterioration produced by deformations of the detector, of thermal or mechanical origin.