Preusche O (2016)
Publication Language: English
Publication Type: Journal article, Original article
Publication year: 2016
Book Volume: 24
Pages Range: 26161-26174
Journal Issue: 23
URI: https://www.osapublishing.org/oe/abstract.cfm?uri=oe-24-23-26161
DOI: 10.1364/OE.24.026161
Open Access Link: https://www.osapublishing.org/oe/abstract.cfm?uri=oe-24-23-26161
A novel way to build arrays of X-ray lenslets is proposed for use in medical imaging, in particular for X-ray phase contrast imaging. Focusing on Talbot-Lau interferometers, this work is about patient dose reduction, especially for design energies above 50 keV.
A low dose poses a fabrication problem, because it requires an analyzer grating which is both fine and high: It has to be fine for a good angular sensitivity. It has to be high to absorb well. However, gratings can currently be built either fine or high.
The proposed solution is to use a fine novel lens grating in front of a high analyzer grating: The lens grating uses lenslets to combine fine fringes into wider strips. This coarser pattern is then analyzed by a high grating. Regular binary production processes are sufficient to build lens gratings. Simulation-based results show that lens gratings can save dose with no impact on reconstructed images.
APA:
Preusche, O. (2016). Lens gratings for dose optimization of medical X-ray phase contrast imaging. Optics Express, 24(23), 26161-26174. https://dx.doi.org/10.1364/OE.24.026161
MLA:
Preusche, Oliver. "Lens gratings for dose optimization of medical X-ray phase contrast imaging." Optics Express 24.23 (2016): 26161-26174.
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