Abstract: An intra-oral scanning device includes a main part having a first mount structure, a scanning arm having at least one signal collector, a drive mechanism connected to the scanning arm to move a head portion of the scanning arm, and a mouthpiece positionable in an oral cavity. The mouthpiece has a hollow interior, an opening to access the hollow interior and a second mount structure. The scanning arm extends into the hollow interior when the first mount structure is connected to the second mount structure. The scanning arm is mounted to a pivot manipulator of the drive mechanism such that an axis of rotation of the pivot manipulator is essentially perpendicular to a longitudinal axis of the scanning arm. The scanning arm is mounted to a linear manipulator of the drive mechanism such that a distance between the pivot manipulator and the head portion of the scanning arm is modifiable.

Abstract: An intra-oral scanning device includes a main part having a first mount structure, a scanning arm having at least one signal collector, a drive mechanism connected to the scanning arm to move a head portion of the scanning arm, and a mouthpiece positionable in an oral cavity. The mouthpiece has a hollow interior, an opening to access the hollow interior and a second mount structure. The scanning arm extends into the hollow interior when the first mount structure is connected to the second mount structure. The scanning arm is mounted to a pivot manipulator of the drive mechanism such that an axis of rotation of the pivot manipulator is essentially perpendicular to a longitudinal axis of the scanning arm. The scanning arm is mounted to a linear manipulator of the drive mechanism such that a distance between the pivot manipulator and the head portion of the scanning arm is modifiable.

Abstract: The subject of the invention comprises of a method of mapping of distribution of reference physical parameters used in tests applying electromagnetic waves, in particular in planar or spatial tests of objects imagined using a computer tomograph, wherein the entire reference (1) or its fragments of components used in its design and forming determinants of its physical parameters are imaged by high-resolution scanning, that is, at least twice, preferably five times higher than the resolution in which the reference will be used in future studies and a collection of layered images of a reference or its fragment or component is obtained, on the basis of which, by reading information out of the image of the particular cross-section, material distribution and/or absorption coefficient distribution is determined directly, with the information about the absorption coefficient, together with coordinates for every voxel, which form so called spatial distribution of the absorption coefficient for the particular reference

Abstract: The subject of the invention comprises method of determination of distortion value and/or distortion correction value for a projection image obtained during computer tomography routine, with application, in particular, in control of the scanning process. The method is characterised in that during the first stage, during object scanning, the value of image distortion and/or its possible change present in individual projection images is determined, by determining the central point, namely the detector spot which receives the most intense irradiation from the X-ray source and/or by determination of calibration image and projection image parameter deviation and/or by comparison of projection images, including comparison of projection images with calibration images.

Abstract: The core of the invention lies in a method of determination of physical parameters of the object (3) imaged using computer tomograph, in particular determination of absolute parameters of physical density and/or X-ray absorption coefficient, wherein the reference (2) of the determined physical parameters is installed between the X-ray source (4) and the detector (1) or, advantageously, directly on the detector (1), outside the rotating tomograph platform where the scanned object (3) is placed, followed by object scanning, during which the images of tomographic projections record simultaneously the two-dimensional image of the studied object and the two-dimensional image of the reference, where for at least one projection for at least one reference area the value of image greyscale intensity is performed in relative units by readout of pixel value from the projection image, which reflects the X-ray radiation intensity in greyscale after passing through the scanner chamber and the reference, and the obtained re