Juvenal Ormachea
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View article: Angular Integral Autocorrelation for Speed Estimation in Shear-Wave Elastography
Angular Integral Autocorrelation for Speed Estimation in Shear-Wave Elastography Open
The utilization of a reverberant shear-wave field in shear-wave elastography has emerged as a promising technique for achieving robust shear-wave speed (SWS) estimation. However, many types of estimators cannot accurately measure SWS withi…
View article: Angular Integral Autocorrelation for Speed Estimation in Shear Wave Elastography
Angular Integral Autocorrelation for Speed Estimation in Shear Wave Elastography Open
The utilization of a reverberant shear wave field in shear wave elastography has emerged as a promising technique for achieving robust shear wave speed (SWS) estimation. However, accurately measuring SWS within such a complex wave field re…
View article: Reverberant Magnetic Resonance Elastographic Using a single Mechanical Driver
Reverberant Magnetic Resonance Elastographic Using a single Mechanical Driver Open
Reverberant elastography provides fast and robust estimates of shear modulus. However, reverberant elastography uses multiple mechanical drivers, hampering clinical utility. In this work, we hypothesize that a single mechanical driver can …
View article: Reverberant magnetic resonance elastographic imaging using a single mechanical driver
Reverberant magnetic resonance elastographic imaging using a single mechanical driver Open
Reverberant elastography provides fast and robust estimates of shear modulus; however, its reliance on multiple mechanical drivers hampers clinical utility. In this work, we hypothesize that for constrained organs such as the brain, reverb…
View article: Reverberant Magnetic Resonance Elastographic Using a single Mechanical Driver
Reverberant Magnetic Resonance Elastographic Using a single Mechanical Driver Open
Reverberant elastography provides fast and robust estimates of shear modulus. However, reverberant elastography uses multiple mechanical drivers, hampering clinical utility. In this work, we hypothesize that a single mechanical driver can …
View article: Pulse-Echo Quantitative US Biomarkers for Liver Steatosis: Toward Technical Standardization
Pulse-Echo Quantitative US Biomarkers for Liver Steatosis: Toward Technical Standardization Open
Excessive liver fat (steatosis) is now the most common cause of chronic liver disease worldwide and is an independent risk factor for cirrhosis and associated complications. Accurate and clinically useful diagnosis, risk stratification, pr…
View article: A preliminary study of liver fat quantification using reported longitudinal ultrasound speed of sound and attenuation parameters
A preliminary study of liver fat quantification using reported longitudinal ultrasound speed of sound and attenuation parameters Open
The quantification of liver fat as a diagnostic assessment of steatosis remains an important priority for noninvasive imaging systems. We derive a framework in which the unknown fat volume percentage can be estimated from a pair of ultraso…
View article: Reverberant Shear Wave Elastography: A Multi-Modal and Multi-Scale Approach to Measure the Viscoelasticity Properties of Soft Tissues
Reverberant Shear Wave Elastography: A Multi-Modal and Multi-Scale Approach to Measure the Viscoelasticity Properties of Soft Tissues Open
There are a variety of approaches used to create elastography images. Techniques based on shear wave propagation have received significant attention. However, there remain some limitations and problems due to shear wave reflections, limite…
View article: Validations of the Microchannel Flow Model for Characterizing Vascularized Tissues
Validations of the Microchannel Flow Model for Characterizing Vascularized Tissues Open
The microchannel flow model postulates that stress-strain behavior in soft tissues is influenced by the time constants of fluid-filled vessels related to Poiseuille’s law. A consequence of this framework is that changes in fluid viscosity …
View article: H-scan sensitivity to scattering size
H-scan sensitivity to scattering size Open
In the H-scan analysis and display, visualization of different scattering sizes and types is enabled by a matched filter approach involving different orders of Gaussian weighted Hermite functions. An important question with respect to clin…