Article

Amplification of the phase contrast signal at very high x-ray energies.

Department of Medical Physics and Bioengineering, UCL, London WC1E 6BT, UK.
Optics Letters (impact factor: 3.4). 03/2012; 37(5):915-7. pp.915-7
Source: PubMed

ABSTRACT X-ray phase contrast imaging is increasingly being used in several fields, both at synchrotron facilities and with laboratory sources, due to its increased sensitivity compared to conventional x-ray methods. One important problem is the development of methods to make it suitable for use at very high x-ray energies, needed in many applications. We show how the edge illumination concept, which stands at the basis of the coded-aperture method, allows achieving hyperintense phase signals at energies close to 100 keV, by showing images of both weak phase objects and highly absorbing fossils with a high iron content.

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Keywords

absorbing fossils
 
coded-aperture method
 
conventional x-ray methods
 
edge illumination concept
 
images
 
increased sensitivity
 
iron content
 
weak phase objects
 
X-ray phase contrast imaging