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Ce contenu n'est pas disponible en français.News & Scientific Highlights
SNF funds dynamic X-ray imaging of the human auditory system in motion
In collaboration with clinicians from the Inselspital and engineers of the University Hospital of Bern, the X-Ray Tomography Group will be part of a new SNF project entitled “The Human Auditory System in Motion: Direct Observation of the Microfunction of Sound Transmission using Dynamic Phase-contrast X-ray Imaging”.
X-ray Imaging for Biomedicine: Imaging Large Volumes of Fresh Tissue at High Resolution
The TOMCAT beamline at the Swiss Light Source specializes in rapid high-resolution 3-dimensional tomographic microscopy measurements with a strong focus on biomedical imaging. The team has recently developed a technique to acquire micrometer-scale resolution datasets on the entire lung structure of a juvenile rat in its fresh natural state within the animal’s body and without the need for any fixation, staining or other alteration that would affect the observed structure (E. Borisova et al., 2020, Histochem Cell Biol).
MacEtch in gas phase: a new nanofabrication technology at PSI
The grating fabrication team of the X-ray tomography group has scored another record in etching technology of silicon by realizing a MacEtch process in gas phase. Ultra-high aspect ratios (up to 10 000 : 1) in the nanoscale regime (down to 10 nm) were achieved by platinum assisted chemical etching of silicon in the gas phase. The results were published in Nanoscale Horizons on February 17, 2020.
Towards dynamic feedback control during time-resolved CT at TOMCAT
Researchers from the CWI in Amsterdam and the TOMCAT beamline have developed and implemented a real-time CT reconstruction, visualisation, and on-the-fly analysis approach to monitor dynamic processes as they occur. With the processing of multiple sets of CT slices per second, this represents the next crucial step towards adaptive feedback control of time-resolved in situ tomographic experiments. The results of this study were published in Scientific Reports on December 5, 2019.
Animal embryos evolved before animals
Detailed characterization of cellular structure and development of exceptionally preserved ancient tiny fossils from South China by synchrotron based X-ray tomographic microscopy at TOMCAT led an international team of researchers from the University of Bristol and Nanjing Institute of Geology and Palaeontology to the discovery that animal-like embryos evolved long before the first animals appear in the fossil record.
The X-ray Tomography Group welcomes Dr. Nazanin Samadi as Post Doc
Dr. Nazanin Samadi will help develop tools for comprehensive simulation of tomography beamline design and will contribute in the technical design report of the future TOMCAT 2.0 beamline upgrade. Before joining the group, she was a PhD student at the University of Saskatchewan in Canada.
Radiographier rapidement et précisément des matériaux composites renforcés de fibres
Des chercheurs de l’Institut Paul Scherrer PSI ont mis au point une méthode de diffusion des rayons X aux petits angles qui peut être utilisée pour le développement ou le contrôle qualité de matériaux composites novateurs renforcés de fibres. Grâce à elle, les analyses de ces matériaux pourraient se faire à l’avenir non seulement par recours aux rayons X issus de sources puissantes comme la Source de Lumière Suisse SLS, mais aussi avec le rayonnement issu de tubes à rayons X conventionnels.
Dr. Anne Bonnin got tenured
Congratulations to Dr. Anne Bonnin for having been tenured. Anne spent 2 years of post-doc and 4 years as beamline scientist at TOMCAT.
Dr. Jinqiu Xu joins the X-ray Tomography Group as Post Doc
Dr. Jinqiu Xu will work with the team developing X-ray phase contrast CT for breast cancer diagnosis. Before coming to PSI, she worked on CT reconstruction from incomplete data at Capital Normal University (Beijing, China).