Diagnosis Commons^™

Biomedical Photoacoustic Imaging Using Gas-Coupled Laser Acoustic Detection, Jami Johnson

Student Research Initiatives

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 ...

Tumour Heterogeneity And Treatment: One Step Forward Or Two Steps Back?, Branavan Manoranjan, Mohsin Ali

The Meducator

No abstract provided.

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, 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

Neurology Update for the Non-Neurologist

No abstract provided.

Migraine Diagnosis And Treatment, Vitaliy Koss Md

Neurology Update for the Non-Neurologist

No abstract provided.

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

Neurology Update for the Non-Neurologist

No abstract provided.

The Fractal Nature And Functional Connectivity Of Brain Function As Measured By Bold Mri In Alzheimer’S Disease, Mohammed A. Warsi

Open Access Dissertations and Theses

Alzheimer’s disease (AD) is a degenerative disease with progressive deterioration of neural networks in the brain. Fractal dimension analysis (FD) of resting state blood oxygen level dependent (BOLD) signals acquired using functional magnetic resonance imaging (fMRI) allows us to quantify complex signalling in the brain and may offer a window into the network erosion. This novel approach can provide a sensitive tool to examine early stages of AD. As AD progresses, we expect to see a reduction in brain connectivity and signal complexity concurrent with biochemical changes (e.g. altered levels of N-acetyl aspartate (NAA), myoinositol (mI) and glutamate ...

The Synthesis Of Dendrimer-Based Radioimaging Agents, Spencer D. Knight

Open Access Dissertations and Theses

The synthesis of new macromolecular diagnostic imaging agents has been a growing field in polymeric chemistry research. Dendrimers provide a viable scaffold for such applications due to their unique, defined macromolecular architecture. The precise structural control afforded via the step-wise synthesis of dendrimers yields exceptional and precise macromolecules that can be functionalized to include necessary imaging moieties with the same degree of precision.

We have herein contributed to this growing field by attempting the synthesis of a series of PEGylated poly(2,2-bis[hydroxymethyl]propanoic acid) PMPA dendrons using thiol-ene "click" chemistry. The series consisted of three dendritic architectures peripherally ...

Diagnostic Validity Of Physical Examination Maneuvers And Patient Reported History For Shoulder Pathology, Lyndsay Somerville

Electronic Thesis and Dissertation Repository

Shoulder pain and disability can pose a diagnostic challenge for clinicians owing to the numerous etiologies than can exist and the potential for multiple disorders to co-exist. There are an abundance of physical examination maneuvers available to clinicians to utilize in their clinical decision making. Additionally the patient history may be an important diagnostic tool in patients with shoulder pathology. The evidence in support of most clinical tests is weak or absent and only a few studies have formally assessed the measurement properties of history findings. The purpose of this study is to determine the diagnostic validity of physical examination ...

Racial Inequality In The Valuation Of Health Outcomes Expressed By The 1992 Acs Guidelines For Prostate Cancer Screening, C. A. Beam

Journal of Health Disparities Research and Practice

In 1992, the American Cancer Society (ACS) recommended annual screening for prostate cancer for men 50 and older using PSA. In this article, I introduce a method to use race and age-specific PSA accuracy data to evaluate differences in the valuation of outcomes by race and age that were expressed by the ACS guidelines. Using this new method, it can be concluded that the guidelines implied a 4-fold greater valuation was assigned to screening young white males with prostate cancer than the value that was assigned to young black males with cancer. Future implementation of guidelines for screening and testing ...