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Articles 1 - 7 of 7
Full-Text Articles in Medicine and Health Sciences
Feasibility Of Using Arterial Spin Labeling For Detecting Longitudinal Changes In Cerebral Blood Flow, Tracy Ssali
Feasibility Of Using Arterial Spin Labeling For Detecting Longitudinal Changes In Cerebral Blood Flow, Tracy Ssali
Electronic Thesis and Dissertation Repository
The ability of the perfusion MRI technique, arterial spin labeling (ASL), to quantify cerebral blood flow (CBF) makes it attractive for longitudinal studies of changes in brain function, such as those related to chronic pain. However, ASL's poor spatial resolution makes image alignment between sessions difficult, leading to increased variance and greater Type-I errors. In addition, variability due to differences in basal blood flow between sessions and confounding effects such as the arterial transit time (ATT) have the potential to reduce reproducibility over time. The focus of this thesis is to investigate the ability of ASL to detect long-term changes …
Hyperpolarized 129xe Magnetic Resonance Imaging Of Radiation-Induced Lung Injury, Ozkan Doganay
Hyperpolarized 129xe Magnetic Resonance Imaging Of Radiation-Induced Lung Injury, Ozkan Doganay
Electronic Thesis and Dissertation Repository
Lung cancer is the largest contributor to cancer-related mortality worldwide. Only 20% of stage III non-small cell lung cancer patients survive after 5-years post radiation therapy (RT). Although RT is an important treatment modality for lung cancer, it is limited by Radiation-Induced Lung Injury (RILI). RILI develops in two phases: (i) the early phase (days-weeks) referred to radiation pneumonitis (RP), and (ii) the late phase (months). There is a strong interest in early detection of RP using imaging to improve outcomes of RT for lung cancer. This thesis describes a promising approach based on 129Xe gas as a contrast …
Inter-Rater Reliability Of The Mckenzie System Of Mechanical Diagnosis And Therapy In The Examination Of The Knee, Sean Willis
Inter-Rater Reliability Of The Mckenzie System Of Mechanical Diagnosis And Therapy In The Examination Of The Knee, Sean Willis
Electronic Thesis and Dissertation Repository
Objective: The purpose of this thesis was to investigate the inter-rater reliability of the McKenzie System of Mechanical Diagnosis and Therapy (MDT) when classifying patients with musculoskeletal knee pain using clinical vignettes. Methods: This study was divided into two phases. First, ten clinicians experienced in the use of MDT were randomly recruited to write a total of 60 clinical vignettes based upon the initial assessment of past patients with knee pain. Second, six different MDT raters were recruited to rate 53 selected vignettes and reliability was determined using Fleiss Kappa. Results: There was “substantial agreement” among six MDT raters …
T2 Relaxation Time In Men And Women Following Eccentric Elbow Flexor Exercise, Patrick A. Moull
T2 Relaxation Time In Men And Women Following Eccentric Elbow Flexor Exercise, Patrick A. Moull
Electronic Thesis and Dissertation Repository
Previous research suggests that estrogen exhibits a protective effect on skeletal muscle and may help curb the effects of induced damage. Eccentric (ECC) exercise has been shown to provide the greatest levels of exercise induced muscle damage (EIMD) and with indirect markers of muscle damage including decreases in strength, increased inflammation, and higher magnitudes of delayed onset muscle soreness (DOMS). Studies have shown that elevations of the T2 relaxation times of activated muscles coincide with these other indirect measures of muscle damage. The purpose of this study was to compare the effects of a high intensity ECC elbow flexor exercise …
Interpretation Of Mutations, Expression, Copy Number In Somatic Breast Cancer: Implications For Metastasis And Chemotherapy, Stephanie Dorman
Interpretation Of Mutations, Expression, Copy Number In Somatic Breast Cancer: Implications For Metastasis And Chemotherapy, Stephanie Dorman
Electronic Thesis and Dissertation Repository
Breast cancer (BC) patient management has been transformed over the last two decades due to the development and application of genome-wide technologies. The vast amounts of data generated by these assays, however, create new challenges for accurate and comprehensive analysis and interpretation. This thesis describes novel methods for fluorescence in-situ hybridization (FISH), array comparative genomic hybridization (aCGH), and next generation DNA- and RNA-sequencing, to improve upon current approaches used for these technologies. An ab initio algorithm was implemented to identify genomic intervals of single copy and highly divergent repetitive sequences that were applied to FISH and aCGH probe design. FISH …
Methotrexate And Cardiovascular Events, Alpesh Shah
Methotrexate And Cardiovascular Events, Alpesh Shah
Electronic Thesis and Dissertation Repository
We conducted a systematic review and meta-analysis to assess the association of MTX with cardiovascular morbidity, cardiovascular mortality and all-cause mortality in patients with autoimmune disease. Our primary outcome was incident cardiovascular events. After screening 13,479 citations, we identified a total of 30 eligible studies. We synthesized adjusted risk estimates using a random effects model. MTX was significantly associated with a 25% reduction in cardiovascular events (pooled RR: 0.75, 95% CI: 0.65, 0.86, I2: 11%), a 55% reduction in cardiovascular mortality (0.45, 95% CI: 0.26, 0.80, I2: 33%) and a 40% reduction in all-cause mortality (0.60, …
Non-Invasive Quantification Of Alveolar Morphometry Measurements In Older Never-Smokers, Gregory A. Paulin
Non-Invasive Quantification Of Alveolar Morphometry Measurements In Older Never-Smokers, Gregory A. Paulin
Electronic Thesis and Dissertation Repository
Diffusion-weighted noble gas pulmonary magnetic resonance imaging (MRI) provides in vivo images with a contrast uniquely sensitive to molecular displacement at cellular and sub-cellular length scales. We estimated the external airway radius (R) and internal airway radius (r) of the alveolar dimensions to evaluate potential differences in acinar duct morphometries in healthy older never-smokers and compared those with a group of ex-smokers. The acinar duct and alveolar MRI morphometry results were within the physiologically-valid range of parameters. Estimated values of internal (r) and external (R) airway radius as well as alveolar sheath (h) and …