Výsledky vyhledávání - "Astrid Velroyen"

Akademický článek

Ex Vivo Perfusion-Simulation Measurements of Microbubbles as a Scattering Contrast Agent for Grating-Based X-Ray Dark-Field Imaging.

Autor: Astrid Velroyen, Martin Bech, Arne Tapfer, Andre Yaroshenko, Mark Müller, Philipp Paprottka, Michael Ingrisch, Clemens C Cyran, Sigrid D Auweter, Konstantin Nikolaou, Maximilian F Reiser, Franz Pfeiffer

Publikováno v: PLoS ONE, Vol 10, Iss 7, p e0129512 (2015)

The investigation of dedicated contrast agents for x-ray dark-field imaging, which exploits small-angle scattering at microstructures for contrast generation, is of strong interest in analogy to the common clinical use of high-atomic number contrast

Externí odkaz: https://doaj.org/article/c81969e07e1f40fe8146788037bc8957

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Akademický článek

3D algebraic iterative reconstruction for cone-beam x-ray differential phase-contrast computed tomography.

Autor: Jian Fu, Xinhua Hu, Astrid Velroyen, Martin Bech, Ming Jiang, Franz Pfeiffer

Publikováno v: PLoS ONE, Vol 10, Iss 3, p e0117502 (2015)

Due to the potential of compact imaging systems with magnified spatial resolution and contrast, cone-beam x-ray differential phase-contrast computed tomography (DPC-CT) has attracted significant interest. The current proposed FDK reconstruction algor

Externí odkaz: https://doaj.org/article/ba8b3af3c28342d3be5588cc47b20b69

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Akademický článek

X-ray phase-contrast tomography of renal ischemia-reperfusion damage.

Autor: Astrid Velroyen, Martin Bech, Irene Zanette, Jolanda Schwarz, Alexander Rack, Christiane Tympner, Tanja Herrler, Claudia Staab-Weijnitz, Margarita Braunagel, Maximilian Reiser, Fabian Bamberg, Franz Pfeiffer, Mike Notohamiprodjo

Publikováno v: PLoS ONE, Vol 9, Iss 10, p e109562 (2014)

The aim of the study was to investigate microstructural changes occurring in unilateral renal ischemia-reperfusion injury in a murine animal model using synchrotron radiation.The effects of renal ischemia-reperfusion were investigated in a murine ani

Externí odkaz: https://doaj.org/article/759f174c66cd4f40a7a948af0ecbbd75

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Applying 3D X-ray Microscopy to Model Coated Gasoline Particulate Filters under Practical Driving Conditions

Autor: Raimund Walter, Jens Neumann, Astrid Velroyen, Olaf Hinrichsen

Publikováno v: Environmental sciencetechnology. 56(17)

Recent progress in 3D X-ray microscopy allows the analysis of coated gasoline particulate filters on a detailed pore-scale level. However, derivable detailed three-dimensional models for filter simulation are not applicable under transient driving co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d66d267acd4af7dc9e3b0b3297180e1
https://pubmed.ncbi.nlm.nih.gov/35994629

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Pulmonary Emphysema Diagnosis with a Preclinical Small-Animal X-ray Dark-Field Scatter-Contrast Scanner

Autor: Fabian Bamberg, Sigrid Auweter, Konstantin Nikolaou, Oliver Eickelberg, Maximilian F. Reiser, Simone Schleede, Felix G. Meinel, Martin Bech, Astrid Velroyen, Andre Yaroshenko, Ali Oe. Yildirim, Arne Tapfer, Alexander Bohla, Franz Pfeiffer

Publikováno v: Europe PubMed Central
Radiology 269, 426-432 (2013)

To test the hypothesis that the joint distribution of x-ray transmission and dark-field signals obtained with a compact cone-beam preclinical scanner with a polychromatic source can be used to diagnose pulmonary emphysema in ex vivo murine lungs.The

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a46c1427a81eacfd512728aace5dd71b
https://doi.org/10.1148/radiol.13122413

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Microbubbles as a scattering contrast agent for grating-based x-ray dark-field imaging

Autor: Michael Ingrisch, Maximilian F. Reiser, Andre Yaroshenko, Clemens C. Cyran, Astrid Velroyen, Arne Tapfer, Konstantin Nikolaou, Franz Pfeiffer, Sigrid Auweter, Martin Bech, Andreas Malecki

Publikováno v: Physics in Medicine and Biology. 58:N37-N46

In clinically established-absorption-based-biomedical x-ray imaging, contrast agents with high atomic numbers (e.g. iodine) are commonly used for contrast enhancement. The development of novel x-ray contrast modalities such as phase contrast and dark

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::716b5201caacbad77e8608ccd826ce84
https://doi.org/10.1088/0031-9155/58/4/n37

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Contrast-to-noise ratio optimization for a prototype phase-contrast computed tomography scanner

Autor: Alexander Sasov, Mark Müller, Arne Tapfer, Martin Bech, Bart Pauwels, Astrid Velroyen, Peter Bruyndonckx, Andre Yaroshenko, Franz Pfeiffer

Publikováno v: The Review of scientific instruments. 86(12)

In the field of biomedical X-ray imaging, novel techniques, such as phase-contrast and dark-field imaging, have the potential to enhance the contrast and provide complementary structural information about a specimen. In this paper, a first prototype

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5400107b026173bea12d4090b9069955
https://pubmed.ncbi.nlm.nih.gov/26724040

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Visualization of subcutaneous insulin injections by x-ray computed tomography

Autor: Felix Beckmann, Martin Bech, Mette Poulsen, Robert Feidenhans'l, Maria Thomsen, Franz Pfeiffer, Julia Herzen, Astrid Velroyen

Publikováno v: Physics in Medicine and Biology. 57:7191-7203

We report how the three-dimensional structure of subcutaneous injections of soluble insulin can be visualized by x-ray computed tomography using an iodine based contrast agent. The injections investigated are performed ex vivo in porcine adipose tiss

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5b46d997ecce4ad0f03e8756caba9e6f
https://doi.org/10.1088/0031-9155/57/21/7191

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