Sökning: "Gadolinium"

Visar resultat 1 - 5 av 78 avhandlingar innehållade ordet Gadolinium.

  1. 1. 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

    Detta är en avhandling från Department of Clinical Sciences, Lund University

    Författare :Barbara Elmståhl; [2006]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Angiography; Computed tomography; toxicity; Contrast media; Glomerular filtration; Gadolinium; Iodine; Kidney failure; Nephrotoxicity.; Medicin människa och djur ; radiology; Clinical physics; Medicine human and vertebrates ; tomography; medical instrumentation; Diagnostik; Diagnostics; medicinsk instrumentering; tomografi; radiologi; Klinisk fysiologi;

    Sammanfattning : Purpose: 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 I- and Gd-CM at 0.01, 0.02, 0. LÄS MER

  2. 2. Gadodiamide injection for Enhancement of MRI in the CNS. Applications, dose, field and time dependence

    Detta är en avhandling från Department of Radiology, Lund University

    Författare :Per Åkeson; [1996]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Clinical physics; Phantom study.; Comparative study; Human; Time dependence; Dosage; Enhancement; Gadolinium; MRI contrast media; Contrast media; Magnetic resonance imaging; Spine; Brain neoplasms; secondary; Brain; radiology; tomography; medical instrumentation; Klinisk fysiologi; radiologi; tomografi; medicinsk instrumentering;

    Sammanfattning : Aims of the study The aims of this study using Gadodiamide injection were to investigate: · Whether Gadodiamide injection was comparable to Gd-DTPA for the enhancement of CNS lesions. · The contrast effect at different field strengths. · The effective time-window for the enhancement of blood-brain barrier damage. LÄS MER

  3. 3. Magnetic resonance imaging, electroneurographic, and clinical findings in Bell's palsy

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Mats Engström; Uppsala universitet.; [1998]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Surgery; Bell s palsy; facial nerve; magnetic resonance imaging; gadolinium; electroneurography; clinical grading; neurapraxia; nerve degeneration; prognostication; Kirurgi; MEDICINE Surgery; MEDICIN Kirurgi; Oto-Rhino-Laryngology; oto-rhino-laryngologi;

    Sammanfattning : Seventy-two patients were examined in order to learn more about the pathophysiology of Bell's palsy and to assess the value of magnetic resonance imaging (MRI) as well as electroneurographic and clinical tests in predicting the outcome in patients with this disease.In 12 of 20 patients (60%) an increased signal intensity in the paranasal sinuses was evident on T2-weighted MRI scans in the early stage of palsy, and in six of the positive patients the high signal intensity had disappeared by the time of the follow-up examination. LÄS MER

  4. 4. Experimental studies of radiation-induced dissolution of UO2 The effect of intrinsic solid phase properties and external factors

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Alexandre Barreiro Fidalgo; KTH.; [2017]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Oxidation; dissolution; uranium dioxide; gadolinium; bentonite; sulfide; hydrogen; gamma radiation; radiolysis; hydrogen peroxide; hydroxyl radical; repository; Kemi; Chemistry;

    Sammanfattning : Dissolution of the UO2 matrix is one of the potential routes for radionuclide release in a future deep geological repository for spent nuclear fuel. This doctoral thesis focuses on interfacial reactions of relevance in radiation-induced dissolution of UO2 and is divided in two parts:In the first part, we sought to explore the effects of solid phase composition:The impact of surface stoichiometry on the reactivity of UO2 towards aqueous radiolytic oxidants was studied. LÄS MER

  5. 5. Functional Performance of Gadolinium Zirconate/Yttria Stabilized Zirconia Multi-Layered Thermal Barrier Coatings

    Detta är en avhandling från Trollhättan : University West

    Författare :Satyapal Mahade; Högskolan Väst.; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Erosion; Gadolinium Zirconate; Suspension Plasma Spray; Thermal Barrier Coatings; Thermal Cyclic Test; Thermal Conductivity; Yttria Stabilized Zirconia; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

    Sammanfattning : Yttria stabilized zirconia (YSZ) is the state of the art ceramic top coat material used for TBC applications. The desire to achieve a higher engine efficiency of agas turbine engine by increasing the turbine inlet temperature has pushed YSZ toits upper limit. LÄS MER