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• W2081496771 abstract "To investigate the use of conventional diagnostic X-ray tubes for applications in which specialist microfocus sources are normally required.A conventional diagnostic X-ray tube was used in conjunction with a range of apertures to investigate improvements in spatial resolution using a line-pairs test object. Phase-contrast effects were investigated by varying source-to-object and object-to-receptor distances using a 2-French catheter as a clinically realistic test object.For magnification radiography using a computed radiography receptor and conventional X-ray tube with a 1-mm nominal focus size, the limiting spatial resolution was improved from 3.55 line-pairs per millimetre, for a conventional contact image, to 5.6 line-pairs per millimetre, for a ×2 magnified view with a 250-µm aperture. For inline phase-contrast radiography, phase contrast enhancement of a 2-French catheter was demonstrated, and the expected trends with variations in source-to-object and object-to-receptor distances were found. Images of a neonatal phantom demonstrated a subtle improvement in visibility of a superimposed 1-French catheter simulating a percutaneously inserted central catheter for no increase in patient radiation dose.Spatial resolution improvement and visible phase contrast can be produced in clinically relevant objects using a pseudo-microfocus geometry at X-ray energies in the normal diagnostic range, using conventional diagnostic X-ray tubes and image receptors. The disadvantages of the proposal are the large distances required to produce phase contrast and limitations imposed by the resulting tube loading.It is possible to use conventional diagnostic X-ray equipment in applications that normally require microfocus X-ray sources. This presents some possibilities for clinical applications." @default.
• W2081496771 created "2016-06-24" @default.
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• W2081496771 date "2014-07-01" @default.
• W2081496771 modified "2023-10-03" @default.
• W2081496771 title "Phase-contrast and magnification radiography at diagnostic X-ray energies using a pseudo-microfocus X-ray source" @default.
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• W2081496771 doi "https://doi.org/10.1259/bjr.20130734" @default.
• W2081496771 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4075579" @default.
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• W2081496771 hasPublicationYear "2014" @default.
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