| Abstract: |
Summary
The study addressed the problem of the incoherence of an X-ray tube generated bundle. In spite of the large progress made in the area of the durability and efficiency of these devices, the problem of the inherent divergence of the bundle hasn’t yet been resolved in a satisfying way. In the face of difficulties with concentrating X-rays, the only practical way of eliminating non-axial rays is by applying lead collimators of a suitable length and diameter as well as mechanical systems of movable distracting grids. An entirely new approach has been the use of electro-magnetorheological fluids as filters, which are capable of modifying their physical and quantum properties contingently based on the parameters of the applied external electric current, centrifugal force and magnetic field. The experiments carried out showed, that the described changes also concern the absorbtion, distraction or change in the direction of the X-ray beam. In the constructed prototype device, interesting and recurrent results in the modification or eleimination of non-axial rays were obtained, which resulted in the improvement of the quality of bone images. The following research questions were posed: (1) are changes in the photodensitometric parameters of joint (PIP) X-ray images containing soft and osseous tissues proof of alterations of the physical parameters of a diagnostic X-ray beam? (2) is there a relationship between the volume of ferrofluid in a lens and its capability to alter the parameters of a permeating X-ray beam? (3) is there a relationship between the r.p.m. of the collimator and its capability to alter the parameters of a permeating X-ray beam, and does it have a linear character? Based on the conducted research a non-linear dependancy was observed between the volume of ferrofluid in the lens as well as its rotational speed and the capability of the system to alter the parameters of the permeating X-ray beam.
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