Zobrazeno 1 - 10
of 223
pro vyhledávání: '"Karim S. Karim"'
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-12 (2023)
Abstract X-ray phase-contrast (XPCi) imaging methods are an emerging medical imaging approach that provide significantly better soft tissue contrast and could function as a viable extension to conventional X-ray, CT, and even some MRI. Absorption gra
Externí odkaz:
https://doaj.org/article/35c4c74541d44db5b7c7d97ca669c8d6
Publikováno v:
Sensors, Vol 22, Iss 15, p 5890 (2022)
In this work, we investigate the potential of employing a direct conversion integration mode X-ray detector with micron-scale pixels in two different X-ray phase-contrast imaging (XPCi) configurations, propagation-based (PB) and edge illumination (EI
Externí odkaz:
https://doaj.org/article/1b0f13fc3c76477c82db2152a307e643
Publikováno v:
Quantum Beam Science, Vol 5, Iss 4, p 29 (2021)
Amorphous selenium (a-Se) is a glass-former capable of deposition at high rates by thermal evaporation over a large area. It was chosen as a direct conversion material due to its appealing properties for imaging in both low and high X-ray energy rang
Externí odkaz:
https://doaj.org/article/fcc5374358b54f019d0e85a53f2265f7
Autor:
Karim S. Karim, Giovanni DeCrescenzo, Alla Reznik, Oleksandr Bubon, Luc Laperriere, Jonathan Greenspan, Olivier Tousignant, Habib Mani, George Belev, Safa Kasap, Joel B. Frey, John A. Rowlands
Publikováno v:
Sensors, Vol 11, Iss 5, Pp 5112-5157 (2011)
In the last ten to fifteen years there has been much research in using amorphous and polycrystalline semiconductors as x-ray photoconductors in various x-ray image sensor applications, most notably in flat panel x-ray imagers (FPXIs). We first outlin
Externí odkaz:
https://doaj.org/article/a516dea15ff84ac383f740215512ccd7
Publikováno v:
Medical Imaging 2023: Physics of Medical Imaging.
Publikováno v:
2022 International Electron Devices Meeting (IEDM).
Autor:
Sam Laxer, Karim S. Karim, Michael G. Farrier, Christopher C. Scott, Antonino Miceli, Parmesh Ravi, Michael Wojcik, Peter Kenesei, Yunzhe Li
Publikováno v:
Journal of Synchrotron Radiation. 28:1081-1089
The objective of this work was to fabricate and characterize a new X-ray imaging detector with micrometre-scale pixel dimensions (7.8 µm) and high detection efficiency for hard X-ray energies above 20 keV. A key technology component consists of a mo
Publikováno v:
IEEE Transactions on Electron Devices. 68:1746-1752
We report on the design and characterization of a monolithic single-photon-counting (SPC) X-ray detector integrating an amorphous semiconductor sensor. Our prototype combines amorphous selenium (a-Se), a well-known photoconductor, with a CMOS readout
Autor:
Peter M. Levine, Abdallah El-Falou, Rhiannon L. Lohr, Karim S. Karim, Christopher C. Scott, Mohamed Hamid, Yun Zhe Li
Publikováno v:
IEEE Sensors Journal. 21:339-346
We present a monolithic hybrid visible-light imager composed of an amorphous selenium (a-Se) photoconductor thin film integrated on a CMOS active pixel sensor (APS) array readout integrated circuit. We achieve more than 14-dB signal-to-noise ratio un
Publikováno v:
Medical Imaging 2022: Physics of Medical Imaging.