Publications by authors named "D Ragan"
Article Synopsis
- Measurement of static magnetic field (B) homogeneity is crucial for routine MRI evaluations, and this report summarizes the efforts of AAPM Task Group 325 in developing measurement methods.
- The TG produced detailed instructions for measuring B homogeneity, tailored to six different MRI scanner vendors, including necessary software, settings, and experimental details to ensure reproducibility.
- The instructions are a living document on the AAPM website, allowing for updates as vendors change, ensuring accurate and consistent evaluations of B homogeneity over time.
A major complication of sepsis is the development of acute kidney injury (AKI). In case of acute tubular damage, Gc-globulin, a known serum sepsis marker is increasingly filtrated into the urine therefore, urinary Gc-globulin (u-Gc) levels may predict septic AKI. We developed and validated a competitive fluorescence ELISA method for u-Gc measurement.
View Article and Find Full Text PDFSARS-CoV-2 infection might cause a critical disease, and patients' follow-up is based on multiple parameters. Oxidative stress is one of the key factors in the pathogenesis of COVID-19 suggesting that its level could be a prognostic marker. Therefore, we elucidated the predictive value of the serum non-enzymatic total antioxidant capacity (TAC) and that of the newly introduced TAC/lymphocyte ratio in COVID-19.
View Article and Find Full Text PDFIntroduction: We aimed to facilitate the diagnosis and prognosis of sepsis-related organ dysfunction through analyzing presepsin (PSEP) and gelsolin (GSN) levels along with a novel marker, the presepsin:gelsolin (PSEP:GSN) ratio.
Methods: Blood samples were collected from septic patients at the intensive care unit (ICU) at three time points (T1-3): T1: within 12 h after admission; T2: second day morning; T3: third day morning. Sampling points for non-septic ICU patients were T1 and T3.
Objectives: We examine the impacts of adolescent arrest on friendship networks. In particular, we extend labeling theory by testing hypotheses for three potential mechanisms of interpersonal exclusion related to the stigma of arrest: rejection, withdrawal, and homophily.
Method: We use longitudinal data on 48 peer networks from PROSPER, a study of rural youth followed through middle and high school.