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Ce contenu n'est pas disponible en français.News & Scientific Highlights
Carolina Arboleda presented a talk contribution at the Swiss Congress of Radiology (SCR2017) in Bern
Carolina Arboleda, senior PhD student at TOMCAT, presented a talk entitled “Assessment of breast lesion malignancy using phase contrast imaging” at the Swiss Congress of Radiology, which highlighted the potential of X-ray grating-based phase contrast imaging to distinguish between benign and malignant lesions utilizing the absorption to dark-field signal ratio of associated calcifications.
Lucia Romano gives an invited talk at EIPBN 2017
Lucia Romano (guest professor at ETH and guest scientist at TOMCAT) has just returned from the largest conference devoted to electron, ion and photon beam technology and nanofabrication (EIPBN) in US, where she gave an invited talk about “Fabrication of high aspect ratio metal gratings for X-ray phase contrast interferometry”.
New TOMCAT paper: The GigaFRoST camera and readout system
The PSI in-house developed GigaFRoST high-speed camera and readout system is available for fast imaging experiments at the TOMCAT beamline, opening up exciting new possibilities for the observation of fast dynamic phenomena with X-ray tomography.
Single shot grating interferometry demonstrated using direct conversion detection
Researchers at the Paul Scherrer Institute's Swiss Light Source in Villigen, Switzerland, have developed an X-ray grating interferometry setup which does not require an analyzer grating, by directly detecting the fringes generated by the phase grating with a high resolution detector. The 25um pitch GOTTHARD microstrip detector utilizes a direct conversion sensor in which the charge generated from a single absorbed photon is collected by more than one channel. Therefore it is possible to interpolate to achieve a position resolution finer than the strip pitch.
Watching lithium move in battery materials
In order to understand limitations in current battery materials and systematically engineer better ones, it is helpful to be able to directly visualize the lithium dynamics in materials during battery charge and discharge. Researchers at ETH Zurich and Paul Scherrer Institute have demonstrated a way to do this.
Preserved Embryos Illustrate Seed Dormancy in Early Angiosperms
The discovery of exceptionally well-preserved, tiny fossil seeds dating back to the Early Cretaceous corroborates that flowering plants were small opportunistic colonizers at that time, according to a new Yale-led study.
Multiresolution X-ray tomography, getting a clear view of the interior
Researchers at PSI have developed a technique that combines tomography measurements at different resolution levels to allow quantitative interpretation for nanoscale tomography on an interior region of interest of the sample. In collaboration with researchers of the institute AMOLF in the Netherlands and ETH Zurich in Switzerland they showcase their technique by studying the porous structure within a section of an avian eggshell. The detailed measurements of the interior of the sample allowed the researchers to quantify the ordering and distribution of an intricate network of pores within the shell.
Côté menu, les premiers mammifères avaient déjà leurs préférences
De toutes nouvelles analyses de petits mammifères fossiles livrent de nouveaux éléments sur la connaissance du menu de nos plus lointains ancêtres. Les résultats permettent de comprendre comment sont apparues certaines caractéristiques typiques des mammifères actuels. Ces conclusions reposent sur des analyses, qui ont été réalisées à la Source de Lumière Suisse (SLS) de l’Institut Paul Scherrer, au moyen de la tomographie par rayons X.
Le contraste de phase améliore la mammographie
Grâce à l'imagerie par contraste de phase, des chercheurs de l’EPF Zurich, de l’Institut Paul Scherrer (PSI) et de l’hôpital cantonal de Baden ont réussi à obtenir des mammographies, grâce auxquelles il est possible de procéder à une évaluation plus précise des cancers et des précancers du sein. Ce procédé pourrait contribuer à une utilisation plus ciblée des biopsies, et à l’amélioration des examens de suivi.