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Full-Text Articles in Medicine and Health Sciences
A New Method For Shear Wave Speed Estimation In Shear Wave Elastography, Aaron J. Engel, Gregory R. Bashford
A New Method For Shear Wave Speed Estimation In Shear Wave Elastography, Aaron J. Engel, Gregory R. Bashford
Biomedical Imaging and Biosignal Analysis Laboratory
Visualization of mechanical properties of tissue can aid in noninvasive pathology diagnosis. Shear wave elastography (SWE) measures the elastic properties of soft tissues by estimation of local shear wave propagation speed. In this paper, a new robust method for estimation of shear wave speed is introduced which has the potential for simplifying continuous filtering and real-time elasticity processing. Shear waves were generated by external mechanical excitation and imaged at a high frame rate. Three homogeneous phantoms of varying elastic moduli and one inclusion phantom were imaged. Waves propagating in separate directions were filtered and shear wave speed was estimated by …
Librarian Actions To Develop And Sustain Human Research Subject Protection: A Pilot Global Study, Charles J. Greenberg, Sangeeta Narang
Librarian Actions To Develop And Sustain Human Research Subject Protection: A Pilot Global Study, Charles J. Greenberg, Sangeeta Narang
Library Philosophy and Practice (e-journal)
The Institutional Review Board (IRB), also known as an Independent Ethics Committee (IEC), is the most widely adopted process to insure human participant protection. The IRB system is overburdened as human research studies and human participation has dramatically increased without a corresponding increase in reviewing clinicians or ethics staff. Librarian involvement in the IRB process is evident but uneven and unstudied on an international scale. A literature review and international survey attempted to provide professional practice context and librarian reflection on the extent of their involvement, roles, and responsibilities in the IRB or IEC institutional process. Survey results reveal that …
Enabling Real-Time Ultrasound Imaging Of Soft Tissue Mechanical Properties By Simplification Of The Shear Wave Motion Equation, Aaron J. Engel, Gregory R. Bashford
Enabling Real-Time Ultrasound Imaging Of Soft Tissue Mechanical Properties By Simplification Of The Shear Wave Motion Equation, Aaron J. Engel, Gregory R. Bashford
Biomedical Imaging and Biosignal Analysis Laboratory
Ultrasound based shear wave elastography (SWE) is a technique used for non-invasive characterization and imaging of soft tissue mechanical properties. Robust estimation of shear wave propagation speed is essential for imaging of soft tissue mechanical properties. In this study we propose to estimate shear wave speed by inversion of the firstorder wave equation following directional filtering. This approach relies on estimation of first-order derivatives which allows for accurate estimations using smaller smoothing filters than when estimating second-order derivatives. The performance was compared to three current methods used to estimate shear wave propagation speed: direct inversion of the wave equation (DIWE), …
‘‘We Can Wipe An Entire Culture’’: Fears And Promises Of Dna Biobanking Among Native Americans, Roberto Abadie, Kathleen Heaney
‘‘We Can Wipe An Entire Culture’’: Fears And Promises Of Dna Biobanking Among Native Americans, Roberto Abadie, Kathleen Heaney
Department of Sociology: Faculty Publications
This paper explores Native American perceptions on DNA biobanking. A qualitative study was conducted among self-declared Native Americans living off reservation in two Midwest cities. Findings demonstrate a paradox: Informants maintain strong hopes for the transformative power of gene-based research while voicing very particular social anxieties. Emerging genomic technologies elicit concerns over the potential for genetic stigmatization or discrimination based on race, preventing access to health insurance or employment. Frequently, social anxieties adopt the narrative form of conspiracy theories which portray powerful agents exploiting or abusing a disenfranchised population. We argue that while Native Americans do not have a monopoly …
Functional Transcranial Doppler Ultrasound For High Temporal Resolution Measurement Of Lateralization In Visual Memory And Visual Search Cognitive Tasks, B. Hage, M. Alwatban, E. Barney, M. Mills, M. Dodd, E. Truemper, Gregory R. Bashford
Functional Transcranial Doppler Ultrasound For High Temporal Resolution Measurement Of Lateralization In Visual Memory And Visual Search Cognitive Tasks, B. Hage, M. Alwatban, E. Barney, M. Mills, M. Dodd, E. Truemper, Gregory R. Bashford
Biomedical Imaging and Biosignal Analysis Laboratory
Functional transcranial Doppler ultrasound (fTCD) is a noninvasive sensing modality that measures blood flow velocities in cerebral arteries (CBFV) with high temporal resolution. Few studies have examined the relationship of CBFV change during visual search and visual memory cognitive tasks. Here a protocol to compare lateralization between these two similar tasks using fTCD is demonstrated. Thirteen healthy volunteers were shown visual scenes on a computer and performed visual search and visual memory tasks while CBFV in the bilateral middle cerebral arteries was monitored with fTCD. Each subject completed 40 trials, consisting of baseline, calibration, instruction, and task periods. Lateralization was …