Over the past 30 years, magnetic resonance imaging has evolved into one of the most important imaging procedures in medical diagnostics. With a new approach based on the use of polarized gases and dissolved substances, it will in future be possible to produce even better quality images of the inside of the human body.
photo/©: Institute of Physics / JGU
At the same time, it is still necessary to overcome various obstacles before practical implementation can be considered. Except in the case of helium, it is not possible to maintain hyperpolarization over relevant periods. "This means we have to abbreviate the processes of polarization, administration, and detection so they can all be performed in no more than a minute at most," states Heil. Moreover, getting the hyperpolarized substances into the bloodstream without harming the body is difficult. In an attempt to resolve this problem, the research team is working with membranes, such as those used in heart-lung machines or for dialysis. "We also need to separate the reaction chamber from the treatment room," explains Dr. Peter Blümler, who is focusing on this aspect. "Perhaps we will also need several membranes to ensure that only the correct substances enter the blood." However, it seems that a solution to another problem may have already been found. While the polarization of helium or xenon can be achieved with lasers, Dr. Kerstin Münnemann of the Max Planck Institute for Polymer Research has shown in her widely acclaimed work that it is possible to induce magnetic polarization in other substances by means of reaction with parahydrogen. The three scientists intend to combine their expertise to create novel diagnostic procedures at the point where physics, chemistry, and medicine intersect.
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More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
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Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
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The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
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