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Latest scientific news

The characterization of dispersions, suspensions, and emulsions is important in a wide range of scientific and industrial applications. Samples may consist of different materials with a wide range of particle sizes and concentrations. In a technology transfer project with LUM GmbH, a single particle sizing and counting instrument with a dynamic detection range of ≥6 decades has been developed to...

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The separate imaging of fat and water rich tissue is a frequent objective in magnetic resonance imaging (MRI). An efficient solution is provided by the Dixon technique where both compartments are excited simultaneously and the signals are later separated based on their different temporal evolution. At the 'ultrahigh' MRI field strength of 7T, the frequency shift between fat and water protons is...

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Abbildung: Graphische Darstellung des Signal-Interpretieren Petri-Netzen (SPIN) der Energiezustände

Research work at PTB is concerned with the analysis, modelling and performance optimisation of energy states in mobile embedded systems. The approach is also transferable to other IT systems, such as data centres.

Mobile devices have become an integral part of communication, business and social interactions. The energy consumption of such systems is constantly increasing due to the ever-expanding...

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WELMEC Legal Metrology Banner

The WELMEC Working Group 7 "Software" [1] of the European Cooperation in Legal Metrology (WELMEC) [2] met online for its 29th meeting on 28 February 2024. The working group is chaired by PTB's Division 8.5 "Metrological IT".

WELMEC Working Group 7 "Software" develops technical interpretations of the essential requirements of the European Measuring Instruments Directive (MID) and incorporates...

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Last fall, the research paper "Wirelessly interfacing sensor-equipped implants and MR scanners for improved safety and imaging" by Berk Silemek, Lukas Winter, and colleagues was published in Magnetic Resonance in Medicine (MRM). This article was now chosen as an MRM Highlights Pick "… because they openly shared design files and software for the MRI implant sensor they developed" (see gitlab1.ptb...

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An independent international group of researchers from academics and national agencies formed a dedicated task group within the American Association of Physicists in Medicine to identify key image quality characteristics and objective test methods for macroscopic fluorescence-guided surgery (FGS). The minimum set of measurements considered important for basic device performance are image sharpness,...

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PhD completed

Sebastian Dietrich-Conzelmann successfully defended his PhD thesis "Quantitative MRI for assessment of myocardial fat infiltration at ultra-high field strength" at the Faculty V – Mechanical Engineering and Transport Systems, Chair of Medical Engineering, of the Technical University Berlin. His work at PTB was supervised by Sebastian Schmitter, Head of PTB's Ultrahigh Field MRI Group 8.14....

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The Bayesian approach to solving inverse problems strongly depends on the choice of a prior. Usually, a prior is constructed from expert knowledge or known physical constraints in a probabilistic fashion. A modern alternative to formulate such expert knowledge are generative models, a popular tool in machine learning to generate data whose properties closely resemble a given database by an...

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At the Faculty of Natural Sciences of the Otto von Guericke University Magdeburg, Johannes Petzold successfully defended his PhD thesis "On radio-frequency implant safety in parallel transmission MRI" and was awarded the German counterpart of the PhD, the "Dr. rer. nat." His work at PTB was supervised by Frank Seifert, head of the MR Technology Group 8.11. Doctoral supervisor at OVGU Magdeburg...

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Abbildung 1: SMGW mit den Netzwerken für den Anschlussnutzer (HAN), die Messtechnik (LMN und dem Anschluss an Weitverkehrsnetze (WAN)

Special, certified software is required for the reliable visualisation of consumption data on intelligent metering systems (smart meters).

As part of the digitalisation of the energy transition, such software must meet the requirements of the Metering Point Operation Act (MsbG) and the specifications of the Federal Office for Information Security (BSI) for the smart meter gateway.

This...

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