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    <ns1:title language="sr">Značaj primene neinvanzivnih naprednih tehnika magnetne rezonance u evaluaciji funkcije bubrežnog alografta</ns1:title>
    <ns2:subtitle language="sr">doktorska disertacija</ns2:subtitle>
    <ns2:alt_title language="en">The significance of non-invasive advanced MRI techniques in evaluation of renal allograft function : doctoral dissertation</ns2:alt_title>
    <ns1:language>sr</ns1:language>
    <ns1:description language="sr">Uvod: Perfuzija predstavlja protok krvi u kapilarnom koritu koji određuje dopremanje nutrijenata ikiseonika tkivu, a u bubrezima reguliše stepen glomerulske filtracije (GFR) kao centralnu merububrežne funkcije. Razvoj neinvazivne i pouzdane metode za merenje bubrežne perfuzije koja bioslikavala GFR bi značajno unapredila pravovremeno otkrivanje oštećenja alografta.Cilj: Utvrđivanje kod kojih pedijatrijskih pacijenata alograft ima oštećenu funkciju merenjemkortikalne bubrežne perfuzije (cRBF), uz upoređivanje sa perfuzijom zdravih kontrola korišćenjemtehnike obeležavanja spinova u arterijskoj krvi magnetnom rezonancom (ASL-MRI).Metodologija: Kod 20 pacijenata sa alograftom i 20 zdravih kontrola je izveden ASL-MRI u ciljukvantifikacije cRBF na parametarskim mapama. cRBF je korelirana sa izračunatim GFR kodalografta i upoređivana među grupama pacijenata sa očuvanom (GFR≥60 mL/min/1.73m2) ioštećenom (GFR&lt;60 mL/min/1.73m2) funkcijom, a zatim i sa zdravim kontrolama.Rezultati: cRBF kod pacijenata sa alograftom je bila u rasponu između 85 i 335ml/100gr/min(prosečno 190.05 ± 67.62 mL/100 g/min). Prosečna cRBF kod pacijenata sa dobrom funkcijom jebila značajno višа nego kod pacijenata sa lošom (225.91±64.38mL/min/100g vs.146.22±41.84mL/min/100g, p=0.005), uz značajnu korelaciju sa GFR kod svih pacijenata (r=0.64,p=0.002). Kod zdravih se prosečan cRBF razlikovao u odnosu na pacijente sa oštećenom funkcijom(322.00±121.36vs. 146.22±41.84ml/100gr/min, p=0.002) dok se nije razlikovao u odnosu napacijente sa stabilnom funkcijom (322.00±121.36vs.225.91±64.38ml/100gr/min, p=0.056).Zaključak: Neinvazivno izmerena kortikalna bubrežna perfuzija ASL-MRI metodom se razlikujeizmeđu pacijenata sa očuvanom i oštećenom funkcijom alografta, sa kojom značajno korelira.</ns1:description>
    <ns1:description language="en">Background: Perfusion represents a blood flow at the level of the tissue capillary bed and determinesthe delivery of nutrients and oxygen, while in kidneys regulates glomerular filtration rate (GFR), asa central measure of renal function. The development of a non-invasive and reliable method for renalperfusion estimation that would reflect GFR would significantly improve on-time identification ofpotential allograft injury.Aim: Discrimination of renal allografts with impaired function by measuring cortical renal bloodflow (cRBF) in pediatric patients, as well as a comparison with cRBF values of healthy controls usingmagnetic resonance imaging arterial spin labelling (ASL-MRI).Methods: We performed ASL-MRI in 20 allograft patients and 20 healthy controls to calculate cRBFon parameter maps. It was correlated to calculated GFR in allografts and compared between patientgroups with good (GFR≥60 mL/min/1.73m2) and impaired allograft function (GFR&lt;60mL/min/1.73m2) as well as with healthy controls.Results: cRBF in patient group ranged between 85 and 335 mL/100 g/min (mean 190.05 ± 67.62mL/100 g/min). Mean cRBF in patients with good allograft function was significantly higher than inpatients with impaired function (225.91±64.38 vs. 146.22±41.84 mL/min/100g, p=0.005), showing ahighly significant correlation with GFR in all subjects (r=0.64, p=0.002). In healthy controls meancRBF was significantly higher than in patients with poor allograft function (322.00±121.36 vs.146.22±41.84 ml/100gr/min, p=0.002) and showed no difference to patients with stable function(322.00±121.36 vs. 225.91±64.38 ml/100gr/min, p=0.056).Conclusion: Cortical perfusion as non-invasively measured by ASL-MRI differs between patientswith good and impaired allograft function and correlates significantly with its function.</ns1:description>
    <ns1:description language="sr">Medicina - Radiologija i nuklearna medicina / Medicine - Radiology and Nuclear medicine  Datum odbrane: 27.06.2022. </ns1:description>
    <ns1:keyword language="sr">transplantacija bubrega; magnetna rezonanca; arterial spin labeling (ASL); bubrežni protok; kvantifikacija kortikalne bubrežne perfuzije</ns1:keyword>
    <ns1:keyword language="en">kidney transplantation; Magnetic Resonance Imaging, Arterial Spin Labeling, renal blood flow, cortical renal perfusion quantification</ns1:keyword>
    <ns1:keyword language="sr">616.61-053.2-089.843-073.3(043.3)</ns1:keyword>
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