A5078426601- Ultrasound Imaging and Elastography
- Photoacoustic and Ultrasonic Imaging
- Ultrasonics and Acoustic Wave Propagation
- Ultrasound and Hyperthermia Applications
- Cardiac Valve Diseases and Treatments
- Cancer Risks and Factors
- Hemodynamic Monitoring and Therapy
- Cardiovascular Function and Risk Factors
- Liver Disease and Transplantation
- Radiomics and Machine Learning in Medical Imaging
- Advanced MRI Techniques and Applications
- Elasticity and Material Modeling
- Advanced Neural Network Applications
- Trauma Management and Diagnosis
- Renal and related cancers
- Global Cancer Incidence and Screening
- Acoustic Wave Phenomena Research
- Case Reports on Hematomas
- Thyroid Cancer Diagnosis and Treatment
- Aerospace and Aviation Technology
- Medical Image Segmentation Techniques
- Renal and Vascular Pathologies
- Cutaneous Melanoma Detection and Management
- Thyroid Disorders and Treatments
- Artificial Intelligence in Healthcare and Education
Yale University
2020-2024
University of Rochester Medical Center
2017
University of Rochester
2010-2015
Rochester Institute of Technology
2015
Characterizing left ventricular deformation and strain using 3D+time echocardiography provides useful insights into cardiac function can be used to detect localize myocardial injury. To achieve this, it is imperative obtain accurate motion estimates of the ventricle. In many analysis pipelines, this step often accompanied by a separate segmentation step; however, recent works have shown both tasks highly related complementary when optimized jointly. work, we present multi-task learning...
The amount of data processed annually over the Internet has crossed zetabyte boundary, yet this Big Data cannot be efficiently or stored using today's mobile devices. Parallel to explosive growth in data, a substantial increase compute-capability and advances cloud computing have brought state-of-the- art mobile-cloud an inflection point, where right architecture may allow devices run applications utilizing intensive computing. In paper, we propose MObile Cloud-based Hybrid Architecture...
Single tracking location (STL) shear wave elasticity imaging (SWEI) is a method for detecting elastic differences between tissues. It has the advantage of intrinsic speckle bias suppression compared with multiple variants SWEI. However, assumption linear model leads to an overestimation modulus in viscoelastic media. A new reconstruction technique denoted single viscosity estimation (STL-VE) introduced correct this overestimation. This utilizes same raw data generated STL-SWEI imaging. Here,...
The physical environment of engineered tissues can influence cellular functions that are important for tissue regeneration. Thus, there is a critical need noninvasive technologies capable monitoring mechanical properties during fabrication and development. This work investigates the feasibility using single tracking location shear wave elasticity imaging (STL-SWEI) quantifying moduli tissue-mimicking phantoms in engineering environments. Scholte surface waves were observed when STL-SWEI was...
We present simulation and phantom studies demonstrating a strong correlation between errors in shear wave arrival time estimates the lateral position of local speckle pattern targets with fully developed speckle. hypothesize that observed variations are largely due to underlying pattern, call effect bias. Arrival estimation is key step quantitative elastography, performed by tracking tissue motion via cross-correlation RF ultrasound echoes or similar methods. Variations scatterer strength...
The displacements involved in Acoustic Radiation Force Impulse (ARFI) Shear Wave Elastography (SWE) are small, with associated high echo correlation. Quantitative SWE techniques estimate the velocity of shear waves by tracking tissue motion at one or more locations ultrasound beams width comparable to dimensions wave. These wave arrival time estimates known be noisy even SNR. We hypothesize that observed variations largely due underlying speckle pattern, and call effect bias. Field II was...
Ultrasound Shearwave Elasticity Imaging (SWEI) is a set of methods for measuring the elastic properties biological tissues. Since tissue are known to change with disease state, application these clinical staging an active area research. However, fundamental signal generation and processing techniques required make property measurements still being developed. Our technique, Single Track Location Acoustic Radiation Force Impulse (STL-ARFI) imaging, was developed address spatial uncertainties...
The estimation of shearwave velocity in biological tissues using Single Track Location Shearwave Elasticity Imaging (STL-SWEI) depends on the assumption that ultrasonically observed particle displacements are due to propagation shearwaves an approximately infinite space. When this is violated, erroneous estimates speed may occur leading image artifacts. One particularly troubling error occurs when slowly propagating Scholte waves generated at solid-fluid interfaces. These interface travel a...
In clinical ultrasound, current 2-D strain imaging faces challenges in quantifying three orthogonal normal components. This requires separate image acquisitions based on the pixel-dependent cardiac coordinate system, leading to additional computations and estimation discrepancies due probe orientation. Most systems lack shear information, as displaying all components is challenging interpret.
Abstract Sonographic detection of mobile echogenic foci within the main portal vein and its branches or liver parenchyma extending along triads to periphery is an alarming finding that has been associated with venous gas in setting bowel ischemia. Ultrasound-enhancing agents (UEAs) have widely utilized abdominal ultrasound for evaluation organ neoplasms vascular patency as well echocardiography cardiac function. The appearance UEAs on can resemble like seen system patients ischemia;...
Single Track Location (STL) Acoustic Radiation Force Impulse (ARFI) imaging has been demonstrated in the setting of linear elastic materials. However, biological tissues are viscoelastic causing shearwave dispersion. As a result, use cross-correlation to estimate speed is not optimal. Specifically, assumption shift-invariance violated. Viscosity Estimation (STL-VE) an alternative reconstruction that overcomes this limitation by applying model reconstruction. Constraints on problem such as...
In elastography, displacement estimation is often performed using cross-correlation-based techniques, assuming fully-developed, homogeneous speckle. the presence of a local, large variation in echo amplitude, such as reflection from vessel wall, this assumption does not hold true, resulting biased estimate. Normalizing by its envelope before reduces effect at cost larger jitter errors. An algorithm proposed to reduce amplitude-dependent bias estimates while avoiding increase error magnitude....