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Article
A new method for quantification and 3D visualization of brain tumor adhesion using slip interface imaging in patients with meningiomas
To develop an objective quantitative method to characterize and visualize meningioma-brain adhesion using MR elastography (MRE)-based slip interface imaging (SII).
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Article
Quantitative assessment of portal hypertension with bi-parametric dual-frequency hepatic MR elastography in mouse models
To determine the potential of bi-parametric dual-frequency hepatic MR elastography (MRE) for predicting portal pressure (PP) in mouse models of portal hypertension (PHTN) with the presence of varying hepatic f...
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Article
Open AccessShort Acquisition Time Super-Resolution Ultrasound Microvessel Imaging via Microbubble Separation
Super-resolution ultrasound localization microscopy (ULM), based on localization and tracking of individual microbubbles (MBs), offers unprecedented microvascular imaging resolution at clinically relevant pene...
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Article
Prediction of nonalcoholic fatty liver disease (NAFLD) activity score (NAS) with multiparametric hepatic magnetic resonance imaging and elastography
To investigate the use of MR elastography (MRE)–derived mechanical properties (shear stiffness (|G*|) and loss modulus (G″)) and MRI-derived fat fraction (FF) to predict the nonalcoholic fatty liver disease (NAFL...
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Article
Open AccessQuantitative background parenchymal uptake on molecular breast imaging and breast cancer risk: a case-control study
Background parenchymal uptake (BPU), which refers to the level of Tc-99m sestamibi uptake within normal fibroglandular tissue on molecular breast imaging (MBI), has been identified as a breast cancer risk fact...
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Article
Open AccessMammographic breast density and risk of breast cancer in women with atypical hyperplasia: an observational cohort study from the Mayo Clinic Benign Breast Disease (BBD) cohort
Atypical hyperplasia (AH) and mammographic breast density (MBD) are established risk factors for breast cancer (BC), but their joint contributions are not well understood. We examine associations of MBD and BC...
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Article
Open AccessAutomated identification of multiple seizure-related and interictal epileptiform event types in the EEG of mice
Visual scoring of murine EEG signals is time-consuming and subject to low inter-observer reproducibility. The Racine scale for behavioral seizure severity does not provide information about interictal or sub-c...
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Chapter and Conference Paper
Robust Kernel Methods for Sparse MR Image Reconstruction
A major challenge in contemporary magnetic resonance imaging (MRI) lies in providing the highest resolution exam possible in the shortest acquisition period. Recently, several authors have proposed the use of L1-...
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Chapter and Conference Paper
Real-Time Tracking of Contrast Bolus Propagation in Continuously Moving Table MR Angiography
The recent introduction of variable-velocity control for Continuously Moving Table Magnetic Resonance Imaging has introduced the ability for interactive examination across extended fields of view. A common app...
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Chapter and Conference Paper
Transient MR Elastography: Modeling Traumatic Brain Injury
Current theory holds that the mechanisms by which head trauma causes hemorrhage, cerebral contusions and diffuse axonal injury result from angular acceleration and its resulting shear motion. We have developed...
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Chapter and Conference Paper
Spatio-temporal Directional Filtering for Improved Inversion of MR Elastography Images
MR elastography can visualize and measure propagating shear waves in tissue-like materials subjected to harmonic mechanical excitation. This allows the calculation of local values of material parameters such a...
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Chapter and Conference Paper
Full 3D Rigid Body Automatic Motion Correction of MRI Images
We demonstrate the first successful automatic motion correction of 3D MRI data with rigid body motion in all six degrees of freedom. An existing 2D retrospective technique is extended to 3D with a shear-based ...
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Chapter and Conference Paper
Motion Correction of MRI from Orthogonal k-Space Phase Difference
Correction of artifacts in MRI from in-plane 2-D rigid body translational motion is possible using only the raw data of two standard 2DFT images acquired of the same object with phase encode direction swapped....
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Chapter and Conference Paper
Spherical Navigator Echoes for Full 3-D Rigid Body Motion Measurement in MRI
A 3-D spherical navigator (SNAV) echo technique for MRI that can measure rigid body motion in all six degrees of freedom simultaneously by sampling a spherical shell in k-space is under development. Rigid body 3-...
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Article
An investigation of the effects of mammographic acquisition parameters on a semiautomated quantitative measure of breast cancer risk
The aim of this work was to investigate the effect of mammographic acquisition parameter variations on the estimation of percent density (PD) produced by a particular semiautomated algorithm. The PD algorithm ...
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Article
Ultrasound grayscale image compression with JPEG and wavelet techniques
The purpose of the study was to evaluate the effects of lossy compression on grayscale ultrasound images to determine how much compression can be applied while still maintaining images that are acceptable for ...
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Chapter and Conference Paper
Reconstruction of elasticity and attenuation maps in shear wave imaging: An inverse approach
Acoustic shear waves of low frequency can be detected and measured using a phase contrast based magnetic resonance imaging technique called MR Elastography or phase measurement based ultrasound techniques. Spa...
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Chapter and Conference Paper
Autofocusing of clinical shoulder MR images for correction of motion artifacts
A post-processing ”autofocusing” algorithm for the reduction of motion artifacts in MR images has been developed and tested on a large clinical data set of high resolution shoulder images. The algorithm uses o...
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Article
Evaluation of irreversible compression of digitized posterior-anterior chest radiographs
The purpose of this article is to assess lossy image compression of digitized chest radiographs using radiologist assessment of anatomic structures and numerical measurements of image accuracy. Forty posterior...
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Article
An analytical look at the effects of compression on medical images
This article will take an analytical look at how lossy Joint Photographic Experts Group (JPEG) and wavelet image compression techniques affect medical image content. It begins with a brief explanation of how t...
