Browsing by Subject "Ultrasound"
Now showing items 1-20 of 21
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Acoustic Radiation Force Impulse Imaging of Myocardial Performance
(2009)Cardiovascular disease is the leading cause of death for developed countries, including the United States. In order to diagnose and detect certain cardiac diseases, it is necessary to assess myocardial performance and function. ... -
Adaptive Ultrasonic Frequency Selection Using Principles of Spatial Coherence
(2022)This dissertation investigates the clinical utility of adaptive ultrasonic frequency selection using principles of spatial coherence. Presently, the status quo for the selection of settings on an ultrasound scanner leaves ... -
Assessment of Mechanical and Hemodynamic Vascular Properties using Radiation-Force Driven Methods
(2011)Several groups have proposed classifying atherosclerotic disease by using acoustic radiationforce (ARF) elasticity methods to estimate the mechanical and materialproperties of plaque. However, recent evidence suggests that ... -
Backscatter Spatial Coherence for Ultrasonic Image Quality Characterization: Theory and Applications
(2020)Adaptive ultrasound systems, designed to automatically and dynamically tune imaging parameters based on image quality feedback, represent a promising solution for reducing the user-dependence of ultrasound. The efficacy ... -
Chronic Myocardial Infarct Visualization Using 3D Ultrasound
(2011)This dissertation aims to demonstrate the feasibility of direct infarct visualization using 3D medical ultrasound. The dissertation proceeds by providing the first ever demonstration of fully-sampled 3D ultrasonic speckle ... -
Coherent flow power Doppler imaging
(2017)Ultrasonic flow detection is a widely used technique to detect vessel, measure blood flow velocities, and monitor perfusion. Conventional techniques include color Doppler imaging and power Doppler (PD) imaging. These methods ... -
Covariance Decomposition of Ultrasonic Backscatter: Application to Estimation-based Image Formation
(2020)Medical ultrasound imaging is portable, real-time, and inexpensive, with countless applications across a range of pathologies and imaging targets. Despite these advantages, many patients suffer from suboptimal image quality, ... -
Deep Learning Based Uncertainty Quantification for Improving Clinical Diagnostic Tools
(2023)Deep learning methods have impacted a wide number of fields, and interest in its applications to clinical medicine continues to grow. Interpretable and uncertainty-aware models are critical for the adoption of artificial ... -
Development of a Vertically Deployed Surface-Acoustic-Wave (VD-SAW) Transducer Platform for Activating Piezo Mechanosensitive Channels
(2021)Ultrasound (US) neuromodulation has the unique advantage to noninvasively manipulate neural activity in deep brain with high spatial resolution and flexibility in beam steering. In recent years, there is a growing interest ... -
Imaging and Characterizing Human Prostates Using Acoustic Radiation Force
(2009)Prostate cancer (PCa) is the most common non-cutaneous cancer in men in the United States. Early detection of PCa is essential for improving treatment outcomes and survival rates. However, diagnosis of PCa at an early stage ... -
Implementation and Algorithm Development of 3D ARFI and SWEI Imaging for in vivo Detection of Prostate Cancer
(2014)Prostate cancer (PCa) is the most common non-cutaneous cancer in men with an estimated almost 30,000 deaths occurring in the United States in 2014. Currently, the most widely utilized methods for screening men for prostate ... -
Mapping Myocardial Elasticity with Intracardiac Acoustic Radiation Force Impulse Methods
(2014)Implemented on an intracardiac echocardiography transducer, acoustic radiation force methods may provide a useful means of characterizing the heart's elastic properties. Elasticity imaging may be of benefit for diagnosis ... -
Multi-Dimensional Ultrasonic Shear Wave Reconstructions: Improving the Accuracy of Viscoelastic Parameter Estimation
(2018)Hepatocellular carcinoma (HCC) lesions are often preceded by liver cirrhosis or Hepatitis C, and patients with these diagnoses are monitored every six months with an ultrasound screening. B-mode ultrasound is an ideal imaging ... -
Nanosecond Shock Wave-Induced Surface Acoustic Waves and Fracture at Fluid-Solid
(2018)I investigate the generation and propagation characteristics of leaky Rayleigh waves (LRWs) by a spherical shock wave incident on a glass-water boundary both experimentally and numerically. The maximum tensile stress produced ... -
Numerical methods for nonlinear wave propagation in ultrasound
(2007-12-14)The intensities associated with the propagation of diagnostic and therapeutic ultrasound pulses are large enough to require a nonlinear description. As a nonlinear wave propagates it distorts, creating harmonics and eventually ... -
Piezoelectric Micromachined Ultrasound Transducers for Medical Imaging
(2011)Piezoelectric micromachined ultrasound transducer (pMUT) two-dimensional (2D) arrays have been proposed as an alternative to conventional bulk-PZT thickness-mode transducers for high frequency, forward-looking, catheter-based ... -
Simulated Cervical ARFI
(2011)Every day, 1,300 children in the U.S. and an additional 34,000 children worldwide are born prematurely. This study acts as a feasibility study for a proposed ultrasonic technique for the identification of preterm birth risk ... -
Techniques for Quantitation of Left Ventricular Volume in Ultrasound Using 4DViz
(2012)In the United States, heart failure is a leading cause of hospitalization. The medical industry places great emphasis on diagnosing heart disease through cardiac metrics like ejection fraction. Left ventricular ejection ... -
The relative analgesic value of a femoral nerve block versus adductor canal block following total knee arthroplasty: a randomized, controlled, double-blinded study.
(Korean journal of anesthesiology, 2020-10)<h4>Background</h4>Multiple comparative studies report that adductor canal blocks provide similar pain relief to femoral nerve blocks following total knee arthroplasty. However, adductor canal blockade fails to anesthetize ... -
Transthoracic Cardiac Acoustic Radiation Force Impulse Imaging
(2013)This dissertation investigates the feasibility of a real-time transthoracic Acoustic Radiation Force Impulse (ARFI) imaging system to measure myocardial function non-invasively in clinical setting. Heart failure is an important ...
