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Full-Text Articles in Medicine and Health Sciences
Motion Artifact Evaluation Of Coronary Ct Angiography Images, Hongfeng Ma
Motion Artifact Evaluation Of Coronary Ct Angiography Images, Hongfeng Ma
Dissertations (1934 -)
The objective of this dissertation was to develop and validate an automated algorithm to quantify motion artifact level on coronary CT angiography (CCTA) images. Unlike existing motion artifact reduction techniques that evaluate the relative level of motion artifacts within one exam, this dissertation aims to quantify the absolute level of motion artifacts across exams from varying patients. The ability to quantify absolute motion artifact level enables several potential applications, for example, assessing and comparing two motion artifact reduction techniques. This dissertation includes three specific aims. Aim 1 investigated the absolute motion artifact quantification effectiveness of six motion artifact metrics using …
Evaluating Wall Shear Stress Indices To Uncover Stimuli For Restenosis And Malapposition In Stented Coronary Arteries, Ali A. Aleiou
Evaluating Wall Shear Stress Indices To Uncover Stimuli For Restenosis And Malapposition In Stented Coronary Arteries, Ali A. Aleiou
Master's Theses (2009 -)
The cause of coronary artery neointimal thickening leading to restenosis in ~10% of drug-eluting stents is unknown. Although research suggests adverse values of traditional wall shear stress (WSS) indices may contribute, studies to date have not accounted for stent geometry, which dictates local WSS patterns influencing drug concentration. Recently proposed WSS indices such as WSS variability and WSS exposure time (WSSET) may shed further light on restenosis or, the opposite effect, resorption. The objective of this investigation was to locally evaluate traditional and recently proposed post-stenting metrics and their respective impact on restenosis or resorption. This study used de-identified data …
Relationship Of Exposure To Heart Failure Discharge Teaching To Readmission Within 30 Days, Becky Ann Pogacar
Relationship Of Exposure To Heart Failure Discharge Teaching To Readmission Within 30 Days, Becky Ann Pogacar
Dissertations (1934 -)
Heart Failure (HF) patients are at increased risk for higher rates of hospital readmission within 30 days. Previous studies have demonstrated educational interventions delivered by nurses reduce readmission but the relationship of the dose of teaching to HF readmission or ED utilization remains unclear. A retrospective correlational design framed by the General Outcomes Effectiveness Model was utilized to (1) establish a relationship between the dose of discharge teaching documented by acute care nurses and the outcomes of hospital readmission and ED utilization within 30 days of a previous hospital discharge and (2) identify the teaching components included in an evidence-based …