Search academic texts

Information × Registration Number 0222U003449, 0119U100151 , R & D reports Title Diagnostic equipment for phase contrast imaging on a compact X-rays source popup.stage_title Head Lebed Oleksandr A., Кандидат фізико-математичних наук Registration Date 24-03-2022 Organization Institute of Applied Physics National Academy of Sciences of Ukraine popup.description2  The aim of the work is solving a series of technical and theoretical problems for the implementation of X-ray free propagation phase contrast at the Institute of Applied Physics of the NAS of Ukraine on the basis of analytical accelerator complex. A comparative analysis is performed and the advantages of certain types of X-ray sources for the realization of phase contrast are shown, in particular by the free propagation method. A series of technical operations and calculations were performed to optimize the X-ray phase contrast channel of the Institute of Applied Physics of the NAS of Ukraine in order to implement experiments over the study of test objects by free propagation method. As a result, the intensity of the source is increased fivefold. Software for image reconstruction in multi-channel X-ray detectors with optically coupled partial images was developed, which included the implementation of algorithms for primary calibration of optical systems of multi-channel X-ray detectors, search for correction matrix coefficients to account for tangential and radial distortions of optical modulations of brightness of the multichannel image. The physical and technical aspects of X-ray computed tomography have been studied. Mathematical bases of reconstruction of tomographic images according to projections and features of restoration of X-ray phase-contrast images are studied. Product Description popup.authors Illyashenko Maksym Viktorovych Zakharets Myhailo I Nahornyy Dmytro A. Polishchuk Anton V. Starodub Stanislav S. Tulyakova Nataliya O. popup.nrat_date 2022-03-24 Close