Results 31 to 40 of about 1,236 (164)
Technical design considerations of a human-scale Talbot-Lau interferometer for dark-field CT
IEEE Transactions on Medical Imaging, 2022 <p>Computed tomography (CT) as an important clinical diagnostics method can profit from extension with dark-field imaging, as it is currently restricted to X-rays' attenuation contrast only. Dark-field imaging allows access to more tissue properties, such as micro-structural texture or porosity. The up-scaling process to clinical scale is complex
Manuel Viermetz +8 more
openaire +2 more sources
Computational and Mathematical Methods in Medicine, Volume 2015, Issue 1, 2015., 2015 X‐ray grating interferometry offers a novel framework for the study of weakly absorbing samples. Three kinds of information, that is, the attenuation, differential phase contrast (DPC), and dark‐field images, can be obtained after a single scanning, providing additional and complementary information to the conventional attenuation image.
Xiaolei Jiang +5 more
wiley +1 more source
X-Ray Optics and Instrumentation, Volume 2008, Issue 1, 2008., 2008 Recently, a novel data acquisition method has been proposed and experimentally implemented for differential phase‐contrast computed tomography (DPC‐CT), in which a conventional X‐ray tube and a Talbot‐Lau‐type interferometer were utilized in data acquisition.
Zhihua Qi +2 more
wiley +1 more source
Matter wave interference using two-level atoms and resonant optical fields [PDF]
, 1998 A theory of matter wave interference is developed in which resonant optical fields interact with two-level atoms. When recoil effects are included, spatial modulation of the atomic density can occur for times that are greater than or comparable with the ...
Berman, P. R., Dubetsky, B.
core +2 more sources
IEEE Transactions on Medical Imaging, 2023 <p>X-ray computed tomography (CT) is a crucial tool for non-invasive medical diagnosis that uses differences in materials' attenuation coefficients to generate contrast and provide 3D information. Grating-based phase- and dark-field-contrast X-ray imaging is an innovative technique that utilizes refraction and small-angle scattering to generate ...
Jakob Haeusele +6 more
openaire +2 more sources
The observation of diffraction phases in matter wave scattering
, 2013 We study the diffraction phase of different orders via the Dyson expansion series, for ultracold atomic gases scattered by a standing-wave pulse. As these diffraction phases are not observable in a single pulse scattering process, a temporal Talbot-Lau ...
Chen, Xuzong +5 more
core +1 more source
Phase-Contrast and Dark-Field Imaging
Journal of Imaging, 2018 Very early, in 1896, Wilhelm Conrad Röntgen, the founding father of X-rays, attempted to measure diffraction and refraction by this new kind of radiation, in vain. Only 70 years later, these effects were measured by Ulrich Bonse and Michael Hart who
Simon Zabler
doaj +1 more source
Influence of molecular temperature on the coherence of fullerenes in a near-field interferometer
, 2004 We study C70 fullerene matter waves in a Talbot-Lau interferometer as a function of their temperature. While the ideal fringe visibility is observed at moderate molecular temperatures, we find a gradual degradation of the interference contrast if the ...
E. Joos +8 more
core +1 more source
Non-iterative Directional Dark-field Tomography
Scientific Reports, 2017 Dark-field imaging is a scattering-based X-ray imaging method that can be performed with laboratory X-ray tubes. The possibility to obtain information about unresolvable structures has already seen a lot of interest for both medical and material science ...
Florian Schaff +4 more
doaj +1 more source
Journal of Imaging, 2018 The diffraction contrast modalities accessible by X-ray grating interferometers are not imaged directly but have to be inferred from sine-like signal variations occurring in a series of images acquired at varying relative positions of the interferometer ...
Jonas Dittmann +2 more
doaj +1 more source