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A major challenge of cardiac ultrahigh field magnetic resonance imaging (MRI) is the impact of respiratory motion. Not only the image quality is limited by varying B1+-inhomogeneities, but also the spatial distribution of the specific absorption rate (SAR) and hence the safety relevant power limits are affected by respiratory motion. To quantify these effects, Natalie Schön (AG 8.14) and...

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Together with Peter Speier from Siemens Healthineers, Juliane Ludwig and colleagues from PTB's research group 8.13 have developed a method to quantitatively detect the respiratory motion of patients in MRI by means of a so-called pilot tone - which is actually a radio-frequency signal - and to adapt the acquisition parameters of the MRI in real time. This prospective motion correction was...

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Andreas Kofler (PTB) published together with Christian Wald (Charité–Universitätsmedizin Berlin), Markus Haltmeier (University of Innsbruck), Tobias Schäffter (PTB) and Christoph Kolbitsch (PTB) an article about a method for image reconstruction based on convolutional dictionary learning.

The method can be seen as a physics-informed and supervised method fo learnind a convolutional dictionary....

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Magnetic Resonance Spectroscopy (MRS) is a unique technique for measuring the concentrations of neurotransmitters and other metabolites non-invasively. Applied to confined pathologies in the brain, it is often desirable to compare spectra from both the affected and the unaffected, contra-lateral area. Ideally, both spectra are acquired simultaneously with minimal cost of extra scan time. To this...

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Christoph S. Aigner, a post-doc of Department 8.1 Biomedical Magnetic Resonance, was appointed as a "Junior Fellow of the International Society for Magnetic Resonance in Medicine (ISMRM)" as a young researcher of outstanding quality and promise. Only 18 awardees were selected globally. The Junior Fellow Program has been established to recognize outstanding researchers at an early stage in their...

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In many clinical MRI examinations, contrast agents containing Gd are used to better visualize blood vessels or certain organs. Since it was discovered about 10 years ago that this can lead to long-term depositions of gadolinium in the brain, the question of the underlying mechanisms -when and how are such depositions occurring?- has been of the highest scientific interest. Patrick Schünke from...

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Together with scientists from the German Cancer Research (DKFZ) in Heidelberg and the Leibniz institute for molecular pharmacology (FMP) in Berlin, Patrick Schünke (PTB) published an article in the scientific journal Physical Chemistry Chemical Physics. The article entitled "Rapid analytical CEST spectroscopy of competitive host–guest interactions using spatial parallelization with a combined...

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The Electromagnetic (EM)/Circuit cosimulation method represents an effective strategy to address problems where a radiative structure has to interact with external supporting circuitries. For this reason, this method is generally exploited in the design of radiofrequency (RF) coils for Magnetic Resonance Imaging (MRI). Especially when multi-element transmit coils are involved, the EM/Circuit...

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Together with Jeanette Schulz-Menger (Charité Berlin, Max Delbrueck Center for Molecular Medicine and HELIOS Klinikum Berlin Buch) Sebastian Dietrich, Christoph Aigner, Johannes Mayer, Christoph Kolbitsch, Tobias Schäffter and Sebastian Schmitter (PTB) have published the scientific article "Motion-compensated fat-water imaging for 3D cardiac MRI at ultra-high fields" in the journal Magnetic...

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Magnetic resonance spectroscopy (MRS) allows to determine the concentrations of important neurometabolites of the brain in a non-invasive way. To utilize the full diagnostic potential of this method in vivo, it is imperative to know the measurement uncertainty of the determined neurometabolite concentrations, as otherwise statistical fluctuations of the measurand may be easily confused with real...

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