Sökning: "clinical artifact"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden clinical artifact.

  1. 1. En jämförelse mellan ipsilaterala stapediusreflexmätningar med olika stimuli och metodik

    Kandidat-uppsats, Göteborgs universitet/Institutionen för neurovetenskap och fysiologi

    Författare :Lucas Ucar; Khachig Ibrahim; [2023-12-18]
    Nyckelord :Ipsilateral stapediusreflexmätning; impedans; klinisk artefakt: automatisering; Ipsilateral stapedius reflex measurement; impedance; clinical artifact; automation.;

    Sammanfattning : Inledning: Tidigare forskning visar att det finns risk för falskt positiva svar vid ipsilateral stapediusreflexmätning. Orsaken är en mätartefakt som kan uppstå och leda till felbedömda reflextrösklar om detta inte uppmärksammas av testutföraren. LÄS MER

  3. 2. Characterization of breast tomosynthesis systems: A comparison and optimization

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

    Författare :Thanh Tra Pham; [2019]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : Aim: The aim of the study is to characterize the dependency of image quality on absorbed dose for two breast tomosynthesis (BT) systems, GE Senographe Pristina and Siemens Mammomat Inspiration and compare the systems. The image quality was evaluated by different parameters such as: in-plane and in-depth spatial resolution, artifact spread function (ASF) and signal-difference-to-noise ratio (SDNR). LÄS MER

  4. 3. Kan omvårdnadshandlingar orsaka EEG-förändringar hos neurokirurgiska intensivvårdspatienter? : En observationsstudie

    Magister-uppsats, Uppsala universitet/Institutionen för folkhälso- och vårdvetenskap

    Författare :Liliana Santeliz Rivas; Emma Widnersson; [2017]
    Nyckelord :Nursing; intensive care; neuro surgical; EEG; Omvårdnad; Intensivvård; Neurokirurgi; EEG;

    Sammanfattning : ABSTRACT Background: An acquired brain injury can be classified as either a primary brain injury or a secondary brain injury. A secondary brain injury can also be caused by secondary clinical insults, such as epileptic seizures. LÄS MER

  5. 4. MicroCT system software updateand implementation of a beamhardening correction method

    Master-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Philip Sundqvist; [2016]
    Nyckelord :;

    Sammanfattning : The School of Technology and Health, STH, has been developing a micro-CTscanner for pre-clinical imaging. The scanner consists of an X-ray tube and aflat panel sensor fixated on a gantry rotating around the object to be imaged. LÄS MER

  7. 5. Motion artifact reduction in PPG signals

    Master-uppsats, Lunds universitet/Avdelningen för Biomedicinsk teknik

    Författare :Jaqub Ghairat; Hassan Mouhsen; [2015]
    Nyckelord :Technology and Engineering;

    Sammanfattning : The aim of this thesis was to investigate methods for artifact removal in PPG signals and to implement and evaluate a few existing algorithms claiming that the amplitude information is recovered when removing motion artifacts from photoplethysmographic signals (PPG) captured from pulse oximeters. We developed a new proposed method that uses a two-stage based approach with singular value decomposition and fixed fast ICA algorithm in order to generate a PPG-correlated reference signal that is used in adaptive noise cancellation. LÄS MER