The study of information extraction based on diffraction enhanced imaging

Abstract

Diffraction enhanced imaging （DEI） is a powerful phasesensitive technique that generates improved contrast of soft tissues compared to the conventional Xray imaging. In this paper, an information extraction method is investigated based on diffraction enhanced imaging, which simultaneously produces three parametric images, depicting separately an object's projected Xray absorption, refraction and ultrasmallangle Xray scattering （USAXS） properties. The information extraction is resolved using analytic reconstruction formulae, and the quality of the obtained parametric images depends on the input images acquired at three distinct analyser crystal orientations. The stability of the reconstruction procedure is discussed using the condition number of matrix, and the theoretical maxima of the refraction angle and USAXS distribution width are given. Finally, validation studies are conducted by use of guinea pig cochleae DEI image.