Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 24 for “"Contrast media"”.
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Monitoring Photocatalytic Degradation of X-ray Contrast Media with Raman Spectroscopy
<p>X-ray contrast media such as diatrizoate and iohexol have been found in wastewater and drinking water and are difficult to remove because they are resistant to water treatment processes. A removal process can be started with ultraviolet photocatalytic degradation of X-ray contrast media in the …
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Are gadolinium contrast media really less nephrotoxic than iodine agents in radiographic examinations? A comparison in relation to their ability to attenuate x-rays in a pig model
… To confront the statement that gadolinium contrast media (Gd-CM) are less nephrotoxic than iodine contrast media (I-CM) when used in x-ray angiographic and computed tomographic (CT) examinations. Methods: I) For CT measurements (mean density in Hounsfield numbers) 20-mL syringes filled with …
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Difference of spreading levels of solution in the cervical epidural injection
… injection with 2.5 ml, 5 ml and 10 ml of the contrast media and local anesthetic. METHODS: Total 137 patients suffering from head, neck, and upper extremity pain were selected. Cervical epidural blocks were performed consecutively with 2.5 ml (n=51) and 5 ml (n=42) and 10 ml (n=42) of 0.4% …
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Untersuchung des intrazellulären Kontrastmittels MnCl2 zur Darstellung des akuten Myokardinfarktes
… was injected with 25 µmol of the intracellular contrast media MnCl2 per kilogram of body weight. Look-Locker images were acquired to measure longitudinal relaxation times (T1) in normal myocardium, reperfused infarction, chamber blood and autochthonous back musculature. T1 values were measured …
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A comparison of contrast patterns of lumbar transforaminal injection in terms of volume
… of injection needed in LTEIs. We studied the contrast spreading patterns after LTEIs with 1 ml, 2 ml, 3 ml of the contrast media and normal saline. METHODS: A total of 65 patients with spine or non-spine diseases were selected. Fluoroscopic guided LTEIs were performed consecutively with 1 …
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Συγκριτική έρευνα νεφροτοξότητας του na-meglumine-diatrizoate (urografin) και του iohexol (omntraque)
… PATIENTS WERE STUDIED WITH IONIC AND NON IONIC CONTRAST MEDIA IN ORDER TO EVALUATE ANY CHANGES OF THE RENAL FUNCTION. FOR THIS PURPOSE VARIATIONS OF SERUM CREATININE AND CREATININE PROTEIN N-ACETYL B- GLUCOSAMINE, DASE AND TRECHALASE IN URINE AND CREATININE CLEARANCE ON A 24 HOUR BASIS BEFORE …
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Multi-photon microscopy enhanced: Exploring annular beams and gold nano-particles for improved imaging
… background fluorescence and decreased contrast, particularly within highly light scattering tissue. This thesis presents two routes for improving the signal in MPM, involving beam shaping of the excitation laser, and using functionalized gold-nanoparticles (AuNPs) as contrast media. In …
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ΕΠΙΣΚΛΗΡΙΔΙΟΣ ΜΥΕΛΟΓΡΑΦΙΑ ΚΑΙ ΣΥΓΚΡΙΣΗ ΑΥΤΗΣ ΠΡΟΣ ΤΗΝ ΥΠΑΡΑΧΝΟΕΙΔΗ ΜΥΕΛΟΓΡΑΦΙΑ ΣΤΟ ΟΥΡΑΙΟ ΑΚΡΟ ΤΗΣ ΟΣΦΥΙΚΗΣ ΜΟΙΡΑΣ ΤΗΣ ΣΠΟΝΔΥΛΙΚΗΣ ΣΤΗΛΗΣ
… TO THE PATHOGENESIS OF DISK HERNIATIONS. THE CONTRAST MEDIA CURRENTLY IN USE, THEIR SUITABILITY AND ADVERSE REACTIONS ARE DISCUSSED. THE FINDINGS ON 44 PATIENTS INCLUDED IN THIS STUDY ARE PRESENTED. THE ABOVE PATIENTS WERE DIVIDED IN TWO GROUPS. THE PATIENTS OF THE FIRST GROUP UNDERWENT BOTH …
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Η συμβολή της ηλεκτρονικής τομογραφίας στη διαφοροδιάγνωση των βλαβών του ενδοκρανίου στην οξεία φάση των κρανιοεγκεφαλικών κακώσεων
… specific indications of I.V. administration of contrast media for better dilineation of particularly isodense lesions, are also analysed. The description of pathogenesis and delineation by C.T. of each specific intracranial lesion, then follows. Our cases are presented in a specific table …
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Quantitative evaluation of image quality in CT imaging using iodine and nanoparticle-based contrast agents
… to distinguish tissues, often enhanced using contrast agents. Although iodine-based media are commonly used, they are limited by toxicity, rapid renal clearance, and risk of allergic reactions. Subsequently research has increasingly focused on high atomic number nanoparticles, such as bismuth …
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Immersed Discontinuous Galerkin Methods for Acoustic Wave Propagation in Inhomogeneous Media
… wave propagation problems in inhomogeneous media where elements are allowed to be cut by the material interface. The proposed methods use the standard discontinuous Galerkin finite element formulation with polynomial approximation on elements that contain one fluid while on interface …
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Syntheses of novel acyclic amino-amido ligands
… the labelling of biological macromolecules in contrast media, a synthesis of the novel bifunctional amido-ligands N,N' -bis[2-(N'',N''-dimethylamino)ethyl]-4-aminobenzylmalondiamide (67) and the 3-aminopropyl derivative (66) from appropriately C-functionalized malonates by amidation with …
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Bioengineering-enhanced neurosurgical solutions
… biodegradability of other molecules suitable as contrast media for neuro-imaging and radiotracers for nuclear medicine investigations. The radiosurgery section in fact continues the previous one, highlighting the rationale for further implementation of radiosurgical protocols thanks to …
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Einfluss der Medienberichterstattung auf die Risikowahrnehmung : eine empirische Untersuchung der impliziten Risikoprämie auf dem deutschen Aktienmarkt
… based on findings in the fields of ambiguity-, media- and communication research. These indicators describe information states where an increased risk perception exists or may arise. These indicators are: Too little, too much, many undifferentiated, contradictory, negative information. To …
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Drinking water disinfection by-products: toxicological impacts and biological mechanisms induced by individual compounds or as complex mixtures
… and v) determine the impact of iodinated X-ray contrast media (ICM) in the source water and the type of disinfectant on the overall toxicity of DBP mixtures. From this study, iodoacetaldehyde was identified as a new DBP and ten HALs induced in vitro cytotoxicity and genotoxicity in Chinese …
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UV- TiO2 photocatalytic degradation of the x-ray contrast agent diatrizoate: kinetics and mechanisms in oxic and anoxic solutions
In recent years, triiodinated X-ray contrast agents (XRCs) have been widely detected in natural waters at concentrations that are often relatively high compared to other pharmaceutical micropollutants due to their extensive use and high biological recalcitrance. Diatrizoate is an ionic XRC that has …
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Intrathyreoidale Iodkonzentration nach intravenöser Applikation nichtionischer Röntgenkontrastmittel ohne und mit prophylaktischer Gabe von Perchlorat
Ziel: Studie zur Klärung der Veränderung der intrathyreoidalen Iodkonzentration nach intravenöser Applikation nicht-ionischer Röntgenkontrastmittel (Iomeprol-300; KM) sowie der Wirksamkeit einer Prophylaxe mit Perchlorat (1380 mg/d) zur Blockade der thyreoidalen Iodaufnahme. Probanden und Methoden: …
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