At this week’s First Pan American/Iberian Meeting on Acoustics in Cancun, researchers presented results on acoustic microscopy, a burgeoning technique that could provide new kinds of medically useful information on biological tissue. Unlike many other microscopy techniques, acoustical microscopy can be performed on living tissue and even inside the body, with the use of small ultrasound probes. And unlike optical microscopy of biological specimens, acoustic microscopy does not require tis sue staining.
In the technique, an ultrasound probe makes contact with a tissue sample, then yields an image based on how the tissue responds to the ultrasound. Although the resolution of acoustical microscopy is ultimately limited to about the cell level, rather than the molecular level (its maximum resolution is about 0.1 microns, about a hundredth of the width of a red blood cell), it can provide unique information on a biological tissue’s mechanical properties. For many materials, the mechanical properties have a wider range of values than the optical properties, so the technique could come in handy for characterizing Alzheimer’s plaques, to name one example. In principle, an acoustic microscope could also yield quick assessments on the pathology of skin lesions, without a biopsy and long before other techniques could provide information.
At the meeting, researchers described how acoustic microscopy is already advancing cardiology, specifically in the area of intravascular ultrasound (IVUS), in which a small ultrasound camera is threaded into the body to detect artery blockage. Using a scanning acoustic microscope to gather basic data on artery plaque, Yoshifumi Saijo of Tohoku University (firstname.lastname@example.org) and his colleagues are helping clinicians better interpret IVUS images. Employing knowledge from acoustical microscopy, Ton van der Steen (email@example.com) of the Erasmus Medical Center in the Netherlands and colleagues have developed a clinical technique called IVUS elasticity imaging, which can detect vulnerable artery plaques, a hard-to-catch condition which kills up to 250,000 people every year in the US alone. (Session 1pBB at the meeting; Background information at http://www.acoustics.o rg/press/144th/Jones.htm and http://www.eur.nl/fgg/thorax/ela sto/)
Smooth propagation of spin waves using gold
26.06.2017 | Toyohashi University of Technology
A 100-year-old physics problem has been solved at EPFL
23.06.2017 | Ecole Polytechnique Fédérale de Lausanne
An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.
Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...
Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.
Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...
Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.
As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...
Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.
With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...
Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine
Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...
19.06.2017 | Event News
13.06.2017 | Event News
13.06.2017 | Event News
26.06.2017 | Life Sciences
26.06.2017 | Physics and Astronomy
26.06.2017 | Information Technology