Results 71 to 80 of about 4,621,962 (301)

Advanced design and experimental validation of MRI contrast agents for fluid pressure mapping using microbubbles [PDF]

open access: yes, 2009
This work is related to monitoring fluid pressure using Magnetic Resonance Imaging or MRI and includes numerical simulations and experimental MRI. The nature of this study is such that techniques other than MRI have been extensively used to assess the ...
Morris, RH, Morris, Robert H
core  

From mice to humans—divergent strategies for intestinal homeostasis and regeneration

open access: yesFEBS Letters, EarlyView.
Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa   +2 more
wiley   +1 more source

A Library of Potential Nanoparticle Contrast Agents for X-Ray Fluorescence Tomography Bioimaging

open access: yes, 2018
Nanoparticles (NPs) have been used as contrast agents for several bioimaging modalities. X-ray fluorescence (XRF) tomography can provide sensitive and quantitative 3D detection of NPs.
Larsson, Jakob C.,   +5 more
core   +1 more source

Binocular interaction: contrast matching and contrast discrimination are predicted by the same model [PDF]

open access: yes, 2007
How do signals from the 2 eyes combine and interact? Our recent work has challenged earlier schemes in which monocular contrast signals are subject to square-law transduction followed by summation across eyes and binocular gain control.
Tim S. Meese   +11 more
core   +1 more source

Modelling stem cell differentiation related processes—A practical overview for biologists

open access: yesFEBS Letters, EarlyView.
Stem cell differentiation is complex and difficult to control experimentally. This review introduces suitable computational modelling approaches that can support stem cell research, from mechanistic ODE and abstract models to multiscale and deep learning methods.
Ricco Zeegelaar   +4 more
wiley   +1 more source

Optical inversion using plasmonic contrast agents

open access: yesEuropean Journal of Applied Mathematics
We describe a new method to reconstruct the permittivity distribution, of an object to image, from the remotely measured electromagnetic field. We propose to use the remote fields measured before and after injecting locally in the medium plasmonic ...
Xinlin Cao   +2 more
doaj   +1 more source

Ultrasound Needle Visibility in Contrast Mode Imaging: An In Vitro and Ex Vivo Study

open access: yesUltrasound International Open, 2017
Purpose To evaluate needle visibility in ultrasound under contrast mode conditions. Materials and Methods Needle visibility was evaluated for bevel, EchoTip® and shaft of 18G Chiba biopsy needle with a 9 MHz linear probe (GE Logiq E9).
Marga B. Rominger   +6 more
doaj   +1 more source

Spatially Localized Sono-Photoacoustic Activation of Phase-Change Contrast Agents

open access: yesPhotoacoustics, 2020
Sono-photoacoustic (SPA) activation lowers the threshold of phase-change contrast agents by timing a laser shot to coincide with the arrival of an acoustic wave at a region of interest.
David S. Li   +5 more
doaj   +1 more source

Intravenous Iodinated Contrast Agents Amplify DNA Radiation Damage at CT [PDF]

open access: yes, 2015
PURPOSE To determine the effect of the use of iodinated contrast agents on the formation of DNA double-strand breaks during chest computed tomography (CT).
Piechowiak, Eike I   +4 more
core   +1 more source

Reconstructing enzyme evolution by protein engineering

open access: yesFEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler   +2 more
wiley   +1 more source

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