Katalog artefaktů při zobrazování magnetickou rezonancí

Abstract

Artefacts in MRI represent complications in diagnostics of pathological findings in examined patients. An artefact can be defined as an undesirable image component in final MR images, predominantly incommensurate with the real spatial distribution of tissues inside an organism. The most frequent causes of their occurrence are represented by magnetic field variability or by physical properties of patients’ tissues; however, artefacts can be divided according to the feasibility of their elimination or the limitation to their impact on image quality. Pursuing the elimination of artefacts, an interactive user interface has been developed in C# programme allowing to improve the quality and preserve the diagnostically important regions of the images based on appropriate application of genuine filtering methods. Included as a supportive element of this software is a detailed catalogue of MR artefacts providing circumstantial account of all artefact groups in conjunction with its online implementation in the form of an educational environment.