Logo of the Physikalisch-Technische Bundesanstalt

News from the divisions

Current news

High-quality aspherical and freeform surfaces are in high demand, and the high-accuracy form measurement of such surfaces is a challenging task. To explore the current status of form measurement systems for complex surfaces such as aspheres and freeforms, interlaboratory comparison measurements are performed. In a new publication, the pseudonymized results obtained using three different surfaces...

[ more ]

Accurate and flexible form measurements for aspherical and freeform surfaces are in high demand, and non-null-test interferometric methods such as tilted-wave interferometry have gained attention as a promising response to this need. Interferometric methods, however, display ambiguities between the measurement of certain form errors and the misalignment of the measured specimen. Therefore,...

[ more ]

The PTB Working Group 8.13 has developed a new AI-powered method to improve the reproducible measurement of biophysical parameters in tissue using Magnetic Resonance Imaging (MRI).

The so-called quantitative MRI (qMRI) faces the challenge of calculating the desired tissue parameter maps from the raw data of the MRI device. This is a complex and non-linear problem. While classical solutions are...

[ more ]

A team from department 8.1 was awarded a price in the 2024 ISMRM Quantitative MR Study Group Challenge at the 2024 ISMRM Annual Meeting in Singapore for the accurate quantification of MR relaxation parameters using their open-source software MRpro (Opens external link in new windowhttps://github.com/PTB-MR/mrpro). Christoph Kolbitsch, head of PTB’s quantitative MRI group, and his team competed successfully against more than 20...

[ more ]

Marie Skłodowska-Curie Actions (MSCA) are a flagship initiative by the European Union, aimed at fostering scientific excellence and promoting international collaboration. These competitive grants support early-stage researchers in developing their careers and broaden their horizons through scientific independence and international mobility. We are thrilled to announce that now the contract papers...

[ more ]

NoBoMet steht für „Notifizierte Stellen in der Metrologie“ und ist die europäische Koordinierungsgruppe für notifizierte Stellen für die EU-Richtlinien 2014/31/EU für nichtselbsttätige Waagen (NAWID) und 2014/32/EU für Messgeräte (MID). 

Im Rahmen der Einführung des neuen Rechtsrahmens der EU im Jahr 2014 wurde der EU-Kommission die Pflicht übertragen, für eine zweckmäßige Koordinierung und...

[ more ]

The tilted-wave interferometer is a promising technique for the development of a reference measurement system for the highly accurate form measurement of aspheres and freeform surfaces. The technique combines interferometric measurements, acquired with a special setup, and sophisticated mathematical evaluation procedures. To determine the form of the surface under test, a computational model is...

[ more ]

For the fast and holistic calibration of screw threads, a new approach has been developed within a TransMet project. The new approach expands the two-dimensional axial section measurement of a commercial stylus instrument to the third dimension by an additional rotation axis. This newly developed concept allows areal calibrations of threads using the standard measurement technology available in...

[ more ]

Embedded in international and national collaborations, scientists from PTB's MR Technology group are working on the development of a cost-effective low-field MRI system to open up new applications for magnetic resonance imaging. Martin Häuer, David Schote and Lukas Winter presented the current prototype "OSI² ONE (v1.0.0)" at the Hannover Messe 2024 at the stand of the Federal Ministry of...

[ more ]

Congratulations to Tom Neumann for the successful defense of his PhD thesis “Motion compensation in MR imaging via external radar sensors at the Faculty V – Mechanical Engineering and Transport Systems, Department of Medical Technology, at Technical University Berlin. His work at PTB was supervised by Christoph Kolbitsch, Head of PTB’s Quantitative MRI Group 8.13. Doctoral supervisors at TU...

[ more ]

After 10 years of successful operation, PTB's TraCIM service has been updated to a modern, customer-friendly platform that also allows future extensions in the field of AI algorithm testing.

[ more ]

We were delighted to learn that the research article "Calibration-free pTx of the human heart at 7T via 3D universal pulses" by Christoph Aigner from PTB's Ultrahigh Field MRI group and his PTB colleagues Sebastian Dietrich, Tobias Schäffter und Sebastian Schmitter, has been recognized as one of the top 10 most cited papers for the years 2022 and 2023 by the journal Magnetic Resonance in...

[ more ]

For observation of aerosol properties, such as the essential climate variable aerosol optical depth (AOD), several measurement networks, such as AERONET, GAW-PFR and SKYNET, are established. The temperature coefficients of sun photometers from AERONET (AErosol Robotic NETwork) network are required to correct for varying ambient temperatures within the framework of the EMPIR project 19ENV04 MAPP...

[ more ]