X-Ray Radiography/Tomography Combined with X-Ray Fluorescence Spectroscopy for Position Sensitive Elemental Analysis of Studied Objects

AbstraktAbstract

The use of single photon counting detectors of Medipix family brings new opportunities for the improvement of the quality in the field of radiation imaging. The properties of the state-of-the-art semiconductor hybrid pixel detectors has already proved their ability to enhance contrast even for the materials with very similar and low intrinsic attenuation. In this Thesis, we introduce new techniques from the fields of X-ray transmission radiography, energy sensitive transmission radiography and X-ray fluorescence mapping together with an implementation of computed tomography reconstruction algorithm for pixelated detectors. The description of a series of necessary measurement procedures, image corrections and data processing algorithms used in developed scripts and software tools. The measurements were performed on prepared phantoms and real biological, composite material and cultural heritage samples.  Author expects these new approaches to improve the quality of obtained images especially in the areas of large sample scanning, material decomposition and surface elemental mapping. The constructed prototypes of scanning systems and designed imaging cameras are now used in restoration laboratory for high-resolution large area sample imaging.

The use of single photon counting detectors of Medipix family brings new opportunities for the improvement of the quality in the field of radiation imaging. The properties of the state-of-the-art semiconductor hybrid pixel detectors has already proved their ability to enhance contrast even for the materials with very similar and low intrinsic attenuation. In this Thesis, we introduce new techniques from the fields of X-ray transmission radiography, energy sensitive transmission radiography and X-ray fluorescence mapping together with an implementation of computed tomography reconstruction algorithm for pixelated detectors. The description of a series of necessary measurement procedures, image corrections and data processing algorithms used in developed scripts and software tools. The measurements were performed on prepared phantoms and real biological, composite material and cultural heritage samples.  Author expects these new approaches to improve the quality of obtained images especially in the areas of large sample scanning, material decomposition and surface elemental mapping. The constructed prototypes of scanning systems and designed imaging cameras are now used in restoration laboratory for high-resolution large area sample imaging.