Sensitivity of laboratory based implementations of edge illumination X-ray phase-contrast imaging
Author(s) -
Paul C. Diémoz,
Charlotte K. Hagen,
Marco Endrizzi,
Alessandro Olivo
Publication year - 2013
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.4845015
Subject(s) - sensitivity (control systems) , optics , phase contrast imaging , coded aperture , aperture (computer memory) , physics , phase (matter) , signal (programming language) , contrast (vision) , enhanced data rates for gsm evolution , angular aperture , phase contrast microscopy , computer science , detector , computer vision , electronic engineering , acoustics , quantum mechanics , engineering , programming language , focal length , lens (geology)
We present a theoretical and experimental analysis of the angular sensitivity of edge illumination X-ray phase-contrast imaging in its implementation with conventional X-ray sources (sometimes referred to as the “coded-aperture” method). We study how the polychromaticity and finite source dimensions encountered in laboratory-based setups affect the detected signal. We also show that the sensitivity is independent of the period of the masks. Experimental images are presented and analyzed, proving that, despite the simple setup, high angular resolutions of a few hundred nanoradians can be obtained.
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