A
Ashley F. Stein
Researcher at Harvard University
Publications - 8
Citations - 512
Ashley F. Stein is an academic researcher from Harvard University. The author has contributed to research in topics: Diffraction & Grating. The author has an hindex of 6, co-authored 8 publications receiving 435 citations. Previous affiliations of Ashley F. Stein include National Institutes of Health & Technische Universität München.
Papers
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Journal ArticleDOI
Single-shot x-ray differential phase-contrast and diffraction imaging using two-dimensional transmission gratings
TL;DR: An x-ray differential phase-contrast imaging method based on two-dimensional transmission gratings that are directly resolved by an x-rays that obviates the need for multiple exposures and separate measurements for different directions and thereby accelerates imaging speed.
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Interpretation of dark-field contrast and particle-size selectivity in grating interferometers.
Susanna K. Lynch,Vinay M. Pai,Julie A. Auxier,Ashley F. Stein,Eric E. Bennett,Camille K. Kemble,Xianghui Xiao,Wah-Keat Lee,Nicole Y. Morgan,H. Wen +9 more
TL;DR: An expression for the dark-field effect in terms of the sample material's complex refractive index is obtained, which can be verified experimentally without fitting parameters.
Journal ArticleDOI
A grating-based single-shot x-ray phase contrast and diffraction method for in vivo imaging
TL;DR: A single-shot version of the grating-based phase contrast x-ray imaging method is developed and demonstrated, which allows for absorption, differential phase contrast, and diffraction images, all from a single raw image and is feasible in live animals.
Journal ArticleDOI
Selective imaging of nano-particle contrast agents by a single-shot x-ray diffraction technique
TL;DR: This work describes the use of two orthogonal transmission gratings to selectively retain diffraction signal from iron oxide particles that are larger than a threshold size, while eliminating the background signal from soft tissue and bone.
Journal ArticleDOI
Quantitative intravascular biological fluorescence-ultrasound imaging of coronary and peripheral arteries in vivo.
Dmitry Bozhko,Eric A. Osborn,Eric A. Osborn,Amir Rosenthal,Johan W. Verjans,Tetsuya Hara,Stephan Kellnberger,Stephan Kellnberger,Georg Wissmeyer,Saak V. Ovsepian,Jason R. McCarthy,Adam Mauskapf,Ashley F. Stein,Farouc A. Jaffer,Vasilis Ntziachristos +14 more
TL;DR: Integrated cNIRF-IVUS enables simultaneous co-registered through-blood imaging of disease related morphological and biological alterations in coronary and peripheral arteries in vivo and may significantly enhance knowledge of arterial pathobiology.