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Articles 1 - 30 of 32
Full-Text Articles in Medicine and Health Sciences
An Evaluation Of The Frankfort Mandibular Plane Angle Bisector (Fmab) Wits Appraisal In The Assessment Of Anteroposterior Jaw Relationships, Natalie Swoboda
An Evaluation Of The Frankfort Mandibular Plane Angle Bisector (Fmab) Wits Appraisal In The Assessment Of Anteroposterior Jaw Relationships, Natalie Swoboda
Electronic Thesis and Dissertation Repository
An accurate anteroposterior measurement of jaw relationships is essential in orthodontic diagnosis and treatment planning. The purpose of this longitudinal study was to establish a new cephalometric Wits appraisal using a bisector of the mandibular plane angle, named the Frankfort Mandibular Plane Angle Bisector (FMAB). The FMAB was used to assess the sagittal jaw relationship in a sample of Class I individuals, and compare this measurement to the ANB angle and the Wits appraisal using the Maxillomandibular Bisector (MMB).
The data were collected from pre-treatment (T0), immediate post-treatment (T1) and two year post-retention (T2) lateral cephalograms of 61 male and …
Investigation Of The Structure And Dynamics Of Regioisomeric Eu³⁺ And Gd³⁺ Chelates Of Nb-Dotma: Implications For Mri Contrast Agent Design, Benjamin Charles Webber
Investigation Of The Structure And Dynamics Of Regioisomeric Eu³⁺ And Gd³⁺ Chelates Of Nb-Dotma: Implications For Mri Contrast Agent Design, Benjamin Charles Webber
Dissertations and Theses
The detection of disease and abnormal pathology by magnetic resonance imaging (MRI) has been aided significantly by the use of gadolinium (Gd3+)-based contrast agents (CAs) over the past three decades. MRI and MRI CAs play a critical role in diagnosing tumors and diseases of the central nervous system. The agents used clinically have been shown to safely increase MRI contrast despite the toxicity of Gd3+, owing to the high kinetic and thermodynamic stability of these chelates. However, current CAs enhance contrast at a small fraction of what is theoretically possible. This leads to the necessity of …
Application Of Flexible Bronchoscopy In Inhalation Lung Injury, Chong Bai, Haidong Huang, Xiaopeng Yao, Shihui Zhu, Bing Li, Jingqing Hang, Wei Zhang, Paul Zarogoulidis, Andreas Gschwendtner, Konstantinos Zarogoulidis, Qiang Li, Michael Simoff
Application Of Flexible Bronchoscopy In Inhalation Lung Injury, Chong Bai, Haidong Huang, Xiaopeng Yao, Shihui Zhu, Bing Li, Jingqing Hang, Wei Zhang, Paul Zarogoulidis, Andreas Gschwendtner, Konstantinos Zarogoulidis, Qiang Li, Michael Simoff
Internal Medicine Faculty Publications
Background: As acute inhalational injury is an uncommon presentation to most institutions, a standard approach to its assessment and management, especially using flexible bronchoscopy, has not received significant attention. Methods: The objective of this study is to evaluate the value of using flexible bronchoscopy as part of the evaluation and management of patients with inhalational lung injury. Twenty-three cases of inhalational lung injury were treated in our three hospitals after a fire in a residential building. The twenty cases that underwent bronchoscopy as part of their management are included in this analysis. After admission, the first bronchoscopy was conducted within …
Image Quality Of Energy-Dependent Approaches For X-Ray Angiography, Jesse Evan Tanguay
Image Quality Of Energy-Dependent Approaches For X-Ray Angiography, Jesse Evan Tanguay
Electronic Thesis and Dissertation Repository
Digital subtraction angiography (DSA) is an x-ray-based imaging method widely used for diagnosis and treatment of patients with vascular disease. This technique uses subtraction of images acquired before and after injection of an iodinated contrast agent to generate iodine-specific images. While it is extremely successful at imaging structures that are near-stationary over a period of several seconds, motion artifacts can result in poor image quality with uncooperative patients and DSA is rarely used for coronary applications.
Alternative methods of generating iodine-specific images with reduced motion artifacts might exploit the energy-dependence of x-ray attenuation in a patient. This could be performed …
Brain Activity And Medical Diagnosis: An Eeg Study, Laila M. Ribas, Fábio T. Rocha, Neli R. Ortega, Armando F. Rocha, Eduardo Massad
Brain Activity And Medical Diagnosis: An Eeg Study, Laila M. Ribas, Fábio T. Rocha, Neli R. Ortega, Armando F. Rocha, Eduardo Massad
Armando F Rocha
Despite new brain imaging techniques that have improved the study of the underlying processes of human decision-making, to the best of our knowledge, there have been very few studies that have attempted to investigate brain activity during medical diagnostic processing.The main purpose of this paper was to investigate brain electroencephalography (EEG) activity associated with diagnostic decision-making in the realm of veterinary medicine using X-rays as a fundamental auxiliary test. The principal component analysis revealed four patterns that accounted for 85% of the total variance in the EEG activity recorded while veterinary doctors read a clinical history, examined an X-ray image …
Preventing Overdiagnosis: How To Stop Harming The Healthy, Ray Moynihan, Jenny Doust, David Henry
Preventing Overdiagnosis: How To Stop Harming The Healthy, Ray Moynihan, Jenny Doust, David Henry
Ray Moynihan
Medicine’s much hailed ability to help the sick is fast being challenged by its propensity to harm the healthy. A burgeoning scientific literature is fuelling public concerns that too many people are being overdosed, overtreated, and overdiagnosed. Screening programmes are detecting early cancers that will never cause symptoms or death, sensitive diagnostic technologies identify “abnormalities” so tiny they will remain benign, while widening disease definitions mean people at ever lower risks receive permanent medical labels and lifelong treatments that will fail to benefit many of them. With estimates that more than $200bn (£128bn; €160bn) may be wasted on unnecessary treatment …
Near-Unity Nuclear Polarization With An Open-Source 129xe Hyperpolarizer For Nmr And Mri, Panayiotis Nikolaou, Aaron M. Coffey, Laura L. Walkup, Brogan M. Gust, Nicholas Whiting, Hayley Newton, Scott Barcus, Iga Muradyan, Mikayel Dabaghyan, Gregory D. Moroz, Matthew S. Rosen, Samuel Patz, Michael J. Barlow, Eduard Y. Chekmenev, Boyd M. Goodson
Near-Unity Nuclear Polarization With An Open-Source 129xe Hyperpolarizer For Nmr And Mri, Panayiotis Nikolaou, Aaron M. Coffey, Laura L. Walkup, Brogan M. Gust, Nicholas Whiting, Hayley Newton, Scott Barcus, Iga Muradyan, Mikayel Dabaghyan, Gregory D. Moroz, Matthew S. Rosen, Samuel Patz, Michael J. Barlow, Eduard Y. Chekmenev, Boyd M. Goodson
Nicholas Whiting
Spectral Discrimination Of Breast Pathologies In Situ Using Spatial Frequency Domain Imaging, Ashley M. Laughney, Venkataramanan Krishnaswamy, Elizabeth J. Rizzo, Mary C. Schwab, Richard J. Barth, David J. Cuccia, Bruce J. Tromberg, Keith D. Paulsen, Brian W. Pogue, Wendy A. Wells
Spectral Discrimination Of Breast Pathologies In Situ Using Spatial Frequency Domain Imaging, Ashley M. Laughney, Venkataramanan Krishnaswamy, Elizabeth J. Rizzo, Mary C. Schwab, Richard J. Barth, David J. Cuccia, Bruce J. Tromberg, Keith D. Paulsen, Brian W. Pogue, Wendy A. Wells
Dartmouth Scholarship
Introduction: Nationally, 25% to 50% of patients undergoing lumpectomy for local management of breast cancer require a secondary excision because of the persistence of residual tumor. Intraoperative assessment of specimen margins by frozen-section analysis is not widely adopted in breast-conserving surgery. Here, a new approach to wide-field optical imaging of breast pathology in situ was tested to determine whether the system could accurately discriminate cancer from benign tissues before routine pathological processing.
Preventing Overdiagnosis: How To Stop Harming The Healthy, Ray Moynihan, Jenny Doust, David Henry
Preventing Overdiagnosis: How To Stop Harming The Healthy, Ray Moynihan, Jenny Doust, David Henry
Jenny Doust
Medicine’s much hailed ability to help the sick is fast being challenged by its propensity to harm the healthy. A burgeoning scientific literature is fuelling public concerns that too many people are being overdosed, overtreated, and overdiagnosed. Screening programmes are detecting early cancers that will never cause symptoms or death, sensitive diagnostic technologies identify “abnormalities” so tiny they will remain benign, while widening disease definitions mean people at ever lower risks receive permanent medical labels and lifelong treatments that will fail to benefit many of them. With estimates that more than $200bn (£128bn; €160bn) may be wasted on unnecessary treatment …
Development And Initial Validation Of A Simple Clinical Decision Tool To Predict The Presence Of Heart Failure In Primary Care: The Mice (Male, Infarction, Crepitations, Edema) Rule, Andrea Roalfe, Jonathan Mant, Jenny Doust, Pelham Barton, Martin Cowie, Paul Glasziou, David Mant, Richard Mcmanus, Roger Holder, Jonathon Deeks, Robert Doughty, Arno Hoes, Kate Fletcher, F.D.Richard Hobbs
Development And Initial Validation Of A Simple Clinical Decision Tool To Predict The Presence Of Heart Failure In Primary Care: The Mice (Male, Infarction, Crepitations, Edema) Rule, Andrea Roalfe, Jonathan Mant, Jenny Doust, Pelham Barton, Martin Cowie, Paul Glasziou, David Mant, Richard Mcmanus, Roger Holder, Jonathon Deeks, Robert Doughty, Arno Hoes, Kate Fletcher, F.D.Richard Hobbs
Jenny Doust
Aims: Diagnosis of heart failure in primary care is often inaccurate, and access to and use of echocardiography is suboptimal. This study aimed to develop and provisionally validate a clinical prediction rule to optimize referral for echocardiography of people identified in primary care with suspected heart failure. Methods and results: A systematic review identified studies of diagnosis of heart failure set in primary care. The individual patient data for five of these studies were obtained. Logistic regression models to predict heart failure were developed on one of the data sets and validated on the others using area under the receiver …
Fluorescence Characterization Of Quantum Dots For Use As Biomarkers, Logan M. Grimes
Fluorescence Characterization Of Quantum Dots For Use As Biomarkers, Logan M. Grimes
Materials Engineering
Fluorescence profiles of quantum dots (QDs) were characterized to select the ideal QDs for encapsulation in phospholipids for use as biomarkers to selectively adhere to cancer cells. QDs were synthesized and extracted 0, 30, 60, and 90 seconds after precursor compounds were mixed. These extractions were isolated by extraction time. Portions from each vial were coated in a zinc sulfide shelling procedure, leaving at least half of the QD solution unshelled. These samples were characterized over four days to monitor fluctuations in fluorescence. This was done utilizing an Ocean Optics spectrometer in conjunction with Spectra Suite software. The central wavelength, …
Necrotizing Sarcoid Granulomatosis With Hemoptysis: A Case Report And Literature Review, Haidong Huang, Chen Li, Chong Bai, Qiang Li, Weiqiang Zheng, Zhi Zhu, Paul Zarogoulidis, Konstantinos Zarogoulidis, Andreas Gschwendtner, Wolfgang Hohenforst-Schmidt, Michael Simoff
Necrotizing Sarcoid Granulomatosis With Hemoptysis: A Case Report And Literature Review, Haidong Huang, Chen Li, Chong Bai, Qiang Li, Weiqiang Zheng, Zhi Zhu, Paul Zarogoulidis, Konstantinos Zarogoulidis, Andreas Gschwendtner, Wolfgang Hohenforst-Schmidt, Michael Simoff
Internal Medicine Faculty Publications
We present a case of 39-year-old male with the symptoms of fever, cough, chest pain and bloody phlegm, whose chest CT showed multiple subpleural nodules and inflammatory infiltration. Video-Assisted Thoracic Surgery ( VATS ) for right subplural nodule was performed and confirmed the diagnosis of necrotizing sarcoid granulomatosis. Prednisolone was administered and the symptoms were under control untill the occurrence of intermittent hemoptysis after 10 months. Chest CT and bronchoscope revealed the right lower lobe nodule with intraluminal necrotic tissue in the right lower lobe posterior basal segment respectively. Fatal hemoptysis happened during endobronchial biopsy by flexible bronchoscope forcep. Based …
Biomedical Photoacoustic Imaging Using Gas-Coupled Laser Acoustic Detection, Jami Johnson
Biomedical Photoacoustic Imaging Using Gas-Coupled Laser Acoustic Detection, Jami Johnson
Student Research Initiative
Several detection methods have been explored for photoacoustic and ultrasound imaging of biological tissues. Piezoelectric transducers are commonly used, which require contact with the sample to be imaged and have limiting bandwidth characteristics. Interferometry detection exhibits improved bandwidth characteristics and resolution, yet generally require complicated optics and the incorporation of a contacting reflective medium. In this paper, we report the use of a noncontact photoacoustic imaging system that does not require the use of a reflective layer. A simple, robust technique known as gas-coupled laser acoustic detection is used, which has previously been applied to evaluation of composite materials. This …
A Knowledge-Based Clinical Toxicology Consultant For Diagnosing Multiple Exposures, Joel D. Schipper, Douglas D. Dankel Ii, A. Antonio Arroyo, Jay L. Schauben
A Knowledge-Based Clinical Toxicology Consultant For Diagnosing Multiple Exposures, Joel D. Schipper, Douglas D. Dankel Ii, A. Antonio Arroyo, Jay L. Schauben
Publications
Objective: This paper presents continued research toward the development of a knowledge-based system for the diagnosis of human toxic exposures. In particular, this research focuses on the challenging task of diagnosing exposures to multiple toxins. Although only 10% of toxic exposures in the United States involve multiple toxins, multiple exposures account for more than half of all toxin-related fatalities. Using simple medical mathematics, we seek to produce a practical decision support system capable of supplying useful information to aid in the diagnosis of complex cases involving multiple unknown substances.
Methods: The system is automatically trained using data mining …
Reliability And Validity Of The Ne1 Wound Assessment Tool (Wat), Stephanie Coon, Faustina Tran, Melinda Vicencio
Reliability And Validity Of The Ne1 Wound Assessment Tool (Wat), Stephanie Coon, Faustina Tran, Melinda Vicencio
UNLV Theses, Dissertations, Professional Papers, and Capstones
Background and Purpose: Current literature indicates a lack of reliability and validity of existing pressure ulcer (PrU) staging systems. This prompted the development of the N.E. One Can Stage (NEOCS). Recently this tool was modified and renamed, the NE1 Wound Assessment Tool (NE1 WAT). The purpose of this study is to test the reliability and validity of the NE1 WAT.
Subjects:
A sample of convenience of nine physical therapists (PTs) and 11 nurses (RNs) with PrU staging as part of their routine work duties were included in this study.
Methods:
A written exam was administered and consisted of assessment questions …
Design, Synthesis And Development Of Transporter Targeting Agents For Image-Guided Therapy And Drug Delivery, Ning Tsao
Dissertations & Theses (Open Access)
The purpose of this study was to design, synthesize and develop novel transporter targeting agents for image-guided therapy and drug delivery. Two novel agents, N4-guanine (N4amG) and glycopeptide (GP) were synthesized for tumor cell proliferation assessment and cancer theranostic platform, respectively. N4amG and GP were synthesized and radiolabeled with 99mTc and 68Ga. The chemical and radiochemical purities as well as radiochemical stabilities of radiolabeled N4amG and GP were tested. In vitro stability assessment showed both 99mTc-N4amG and 99mTc-GP were stable up to 6 hours, whereas 68Ga-GP was stable up to 2 hours. Cell culture studies …
The Relationship Between Vitamin D Status Of Adult Women And Diet, Sun Exposure, Skin Reflectance, Body Composition, And Insulin Sensitivity, Marisa M. Mcadler
The Relationship Between Vitamin D Status Of Adult Women And Diet, Sun Exposure, Skin Reflectance, Body Composition, And Insulin Sensitivity, Marisa M. Mcadler
Master's Theses
As the prevalence of vitamin D deficiency continues to grow, mounting evidence supporting its link with chronic disease strengthens suggesting vitamin D’s candidacy in the prevention and treatment of multiple disease states and their complications. Dietary guidelines, however, do not take sun exposure into account. The present study sought to explore the impact of sun exposure on vitamin D status (serum 25(OH)D), and identify other significant determinants of serum levels which may have the greatest effects on overall health. Participants (n = 34) were pre-menopausal women aged 18 to 50 years (mean age 39 ± 6 years), who had their …
Effects Of Clostridium Difficile On The Human Immune Response, Mike Mcgovern
Effects Of Clostridium Difficile On The Human Immune Response, Mike Mcgovern
Honors Projects in Science and Technology
Clostridium difficile is a bacterium that is rapidly becoming a large issue in the medical community due to its tendency to infect hospital patients and its resistance to antibiotics. By studying the way in which the pathogen interacts with the human immune system, it is possible to better understand how the body naturally fights off the disease. This knowledge can allow medical professionals to develop treatments that can help curtail the infection before serious symptoms occur. Working under a grant program alongside Professors Kirsten Hokeness and Chris Reid, I was able to research the effects that exposure to the C. …
Detecting Point-Like Sources Of Unknown Frequency Spectra, Raffaele Solimene, Giuseppe Ruvio, Angela Dell’Aversano, Antonio Cuccaro, Max Ammann, Rocco Pierri
Detecting Point-Like Sources Of Unknown Frequency Spectra, Raffaele Solimene, Giuseppe Ruvio, Angela Dell’Aversano, Antonio Cuccaro, Max Ammann, Rocco Pierri
Articles
The problem of detecting point-like sources whose frequency spectrum is unknown is addressed. Limitations of single-frequency approaches are identified by analytical as well as numerical arguments. To overcome these limits, different multifrequency approaches which combine frequency data incoherently are compared. In particular, a novel multifrequency MUSIC-like algorithm based on interferometric concepts is proposed. Results show that the algorithm outperforms other methods under comparison.
Diagnosis And Evaluation Of Peripheral Neuropathies, Jay D. Varrato Do
Diagnosis And Evaluation Of Peripheral Neuropathies, Jay D. Varrato Do
Neurology Update for the Non-Neurologist
No abstract provided.
Diagnosis And Treatment Options For Multiple Sclerosis, Gary Clauser Md
Diagnosis And Treatment Options For Multiple Sclerosis, Gary Clauser Md
Neurology Update for the Non-Neurologist
No abstract provided.
Diagnosis, Evaluation And Treatments For Dementia, John W. Margraf Md
Diagnosis, Evaluation And Treatments For Dementia, John W. Margraf Md
Neurology Update for the Non-Neurologist
No abstract provided.
Diagnosis, Assessment And Evaluation For Seizures, John W. Margraf Md
Diagnosis, Assessment And Evaluation For Seizures, John W. Margraf Md
Neurology Update for the Non-Neurologist
No abstract provided.
Migraine Diagnosis And Treatment, Vitaliy Koss Md
Migraine Diagnosis And Treatment, Vitaliy Koss Md
Neurology Update for the Non-Neurologist
No abstract provided.
Automated Point-Of-Care Image Processing Methodology For The Diagnosis Of Malaria, Michael B. Jorgensen
Automated Point-Of-Care Image Processing Methodology For The Diagnosis Of Malaria, Michael B. Jorgensen
Master's Theses
Malaria has profoundly influenced human history for over four thousand years and despite numerous attempts at eradication, the prevention, diagnosis, and treatment of malaria have been largely ineffective. More than five hundred million people are affected by malaria every year resulting in over one million deaths. Drug resistance development by the parasite has diminished the effectiveness of numerous treatment options due, in part, to overtreatment of negative patients based on insufficient clinical algorithms and diagnostic methods. The goal of this research was to develop an image analysis algorithm to diagnose malaria with a high degree of sensitivity and specificity in …
The Importance Of Honesty During Prognosis: Personal Injury, Denver S. Burke
The Importance Of Honesty During Prognosis: Personal Injury, Denver S. Burke
Denver S Burke
There is widespread conjecture within the medical profession regarding the impact patient empathy and honesty has on the recovery process. A brief discussion helps explain it in more detail.
Is Modafinil (Provigil®) Effective In Improving Cognitive Function In Adults With Narcolepsy?, Stephanie V. Bui
Is Modafinil (Provigil®) Effective In Improving Cognitive Function In Adults With Narcolepsy?, Stephanie V. Bui
PCOM Physician Assistant Studies Student Scholarship
OBJECTIVE: The objective of this selective EBM review is to determine whether or not modafinil (Provigil®) is effective in improving cognitive function in adults with narcolepsy.
STUDY DESIGN: Review of all English language primary randomized controlled trials from 1996 to 2010.
DATA SOURCES: Double-blind, randomized controlled trials that compared modafinil (Provigil®) to a visually matched placebo were found using OVID, MEDLINE, and Cochrane Databases.
OUTCOME(S) MEASURED: Each of the three trials assessed the effect of modafinil on cognitive and executive function by Low-Resolution Brain Electromagnetic Tomography (LORETA), and the following assessment tools: Epworth Sleepiness Scale (ESS), Multiple Sleep …
A Dna Computer For Glioblastoma Multiforme Diagnosis And Drug Delivery, Sumaiya F. Hashmi
A Dna Computer For Glioblastoma Multiforme Diagnosis And Drug Delivery, Sumaiya F. Hashmi
CMC Senior Theses
Glioblastoma multiforme (GBM) is a debilitating malignant brain tumor with expected patient survival of less than a year and limited responsiveness to most treatments, often requiring biopsy for diagnosis and invasive surgery for treatment. We propose a DNA computer system, consisting of input, computation, and output components, for diagnosis and treatment. The input component will detect the presence of three GBM biomarkers: vascular endothelial growth factor (VEGF), caveolin-1α (CAV), and B2 receptors. The computation component will include indicator segments for each of these genes, and ensure that output is only released if all the biomarkers are present. The output component …
A Machine Learning Approach To Diagnosis Of Parkinson’S Disease, Sumaiya F. Hashmi
A Machine Learning Approach To Diagnosis Of Parkinson’S Disease, Sumaiya F. Hashmi
CMC Senior Theses
I will investigate applications of machine learning algorithms to medical data, adaptations of differences in data collection, and the use of ensemble techniques.
Focusing on the binary classification problem of Parkinson’s Disease (PD) diagnosis, I will apply machine learning algorithms to a primary dataset consisting of voice recordings from healthy and PD subjects. Specifically, I will use Artificial Neural Networks, Support Vector Machines, and an Ensemble Learning algorithm to reproduce results from [MS12] and [GM09].
Next, I will adapt a secondary regression dataset of PD recordings and combine it with the primary binary classification dataset, testing various techniques to consolidate …
Prediction Models For Solitary Pulmonary Nodules Based On Curvelet Textural Features And Clinical Parameters, Jing-Jing Wang, Hai-Feng Wu, Tao Sun, Xia Li, Wei Wang, Li-Xin Tao, Da Huo, Ping-Xin Lv, Wen He, Xiu-Hua Guo
Prediction Models For Solitary Pulmonary Nodules Based On Curvelet Textural Features And Clinical Parameters, Jing-Jing Wang, Hai-Feng Wu, Tao Sun, Xia Li, Wei Wang, Li-Xin Tao, Da Huo, Ping-Xin Lv, Wen He, Xiu-Hua Guo
Research outputs 2013
Lung cancer, one of the leading causes of cancer-related deaths, usually appears as solitary pulmonary nodules (SPNs) which are hard to diagnose using the naked eye. In this paper, curvelet-based textural features and clinical parameters are used with three prediction models [a multilevel model, a least absolute shrinkage and selection operator (LASSO) regression method, and a support vector machine (SVM)] to improve the diagnosis of benign and malignant SPNs. Dimensionality reduction of the original curvelet-based textural features was achieved using principal component analysis. In addition, non-conditional logistical regression was used to find clinical predictors among demographic parameters and morphological features. …