Opin vísindi

Fletta eftir höfundi "Harðarson, Sveinn Hákon"

Fletta eftir höfundi "Harðarson, Sveinn Hákon"

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    Automation improves repeatability of retinal oximetry measurements 
    Karlsson, Róbert Arnar; Ólafsdottir, Ólöf Birna; Helgadóttir, Védis; Belhadj, Soumaya; Elíasdóttir, Þórunn Scheving; Stefánsson, Einar; Harðarson, Sveinn Hákon (2021-12)
    Purpose Retinal oximetry is a technique based on spectrophotometry where images are analyzed with software capable of calculating vessel oxygen saturation and vessel diameter. In this study, the effect of automation of measurements of retinal vessel ...
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    Retinal oximetry measures systemic hypoxia in central nervous system vessels in chronic obstructive pulmonary disease 
    Eliasdottir, Thorunn; Bragason, Davíð; Harðarson, Sveinn Hákon; Vacchiano, Charles; Gislason, Thorarinn; Kristjánsdóttir, Jóna Valgerður; Kristjánsdóttir, Gudrún; Stefánsson, Einar (Public Library of Science (PLoS), 2017-03-22)
    Background Determination of the blood oxyhemoglobin saturation in the retinal vessels of the eye can be achieved through spectrophotometric retinal oximetry which provides access to the state of oxyhemoglobin saturation in the central nervous system ...
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    Retinal oximetry with a prototype handheld oximeter during hyperoxia 
    Vehmeijer, Wouter B.; Jonkman, Kelly; Harðarson, Sveinn Hákon; Aarts, Leon; Stefánsson, Einar; Dahan, Albert; Schalij-Delfos, Nicoline E. (2021-03-01)
    Purpose: Retinal oximetry measures oxygen saturation in retinal vessels. With the introduction of a mobile handheld prototype oximeter, this technique will become available for a broader patient population including bedridden patients and newborn babies. ...
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    Retinal oxygen saturation changes progressively over time in diabetic retinopathy 
    Harðarson, Sveinn Hákon; Stefánsson, Einar; Bek, Toke (2021-05-12)
    Purpose According to cross-sectional studies, oxygen saturation is elevated in retinal vessels in diabetic patients. We evaluated how retinal oxygenation (metabolic marker), vessel diameters and retinopathy grade (structural markers) change over time ...