Oxford University researchers have devised a novel coil design for magnetic resonance (MR) application, devised specifically for deep organ MR where sensitive imaging and spectroscopy have been previously difficult.
Deep organ magnetic resonance requires maximised sensitivity and magnetic field homogeneity over a relatively large field of view (FOV). However, it is difficult to maximise both sensitivity and magnetic field homogeneity simultaneously. The sensitivity can be maximised by reducing the coil volume, but this minimises the magnetic field homogeneity. Conversely, the magnetic field homogeneity can be maximised by increasing the coil volume, but this minimises sensitivity.
The conventional approach to addressing the problem of sensitivity and homogeneity balance utilises the Phased-Coil array. The Phased-Coil array consists of closely packed surface coils that offer both the sensitivity of a surface coil and the large FOV benefit of a volume coil. This approach, however, requires a separate RF transmitter coil and MR scanner with multiple receiver channels, thereby significantly increasing both the complexity and cost of use.
Jennifer Johnson | alfa
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Solar cells based on perovskite compounds could soon make electricity generation from sunlight even more efficient and cheaper. The laboratory efficiency of these perovskite solar cells already exceeds that of the well-known silicon solar cells. An international team led by Stefan Weber from the Max Planck Institute for Polymer Research (MPI-P) in Mainz has found microscopic structures in perovskite crystals that can guide the charge transport in the solar cell. Clever alignment of these "electron highways" could make perovskite solar cells even more powerful.
Solar cells convert sunlight into electricity. During this process, the electrons of the material inside the cell absorb the energy of the light....
Empa researchers have succeeded in applying aerogels to microelectronics: Aerogels based on cellulose nanofibers can effectively shield electromagnetic radiation over a wide frequency range – and they are unrivalled in terms of weight.
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A promising operating mode for the plasma of a future power plant has been developed at the ASDEX Upgrade fusion device at Max Planck Institute for Plasma...
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"Automation in Aerospace Industry @ Fraunhofer IFAM"
The Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM l Stade is presenting its forward-looking R&D portfolio for the first time at...
With an X-ray experiment at the European Synchrotron ESRF in Grenoble (France), Empa researchers were able to demonstrate how well their real-time acoustic monitoring of laser weld seams works. With almost 90 percent reliability, they detected the formation of unwanted pores that impair the quality of weld seams. Thanks to a special evaluation method based on artificial intelligence (AI), the detection process is completed in just 70 milliseconds.
Laser welding is a process suitable for joining metals and thermoplastics. It has become particularly well established in highly automated production, for...
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