Hard X-ray phase-contrast tomography of non-homogeneous specimens: grating interferometryversuspropagation-based imaging

2016 ◽  
Vol 23 (5) ◽  
pp. 1202-1209 ◽  
Author(s):  
Maite Ruiz-Yaniz ◽  
Irene Zanette ◽  
Adrian Sarapata ◽  
Lorenz Birnbacher ◽  
Mathias Marschner ◽  
...  
Keyword(s):  
Experimental Data ◽  
Phase Contrast ◽  
Phase Retrieval ◽  
Phase Contrast Imaging ◽  
Contrast Imaging ◽  
Homogeneous Sample ◽  
X Ray ◽  
Practical Applications ◽  
Phase Contrast Tomography ◽  
Complex Valued

X-ray phase-contrast imaging is an effective approach to drastically increase the contrast and sensitivity of microtomographic techniques. Numerous approaches to depict the real part of the complex-valued refractive index of a specimen are nowadays available. A comparative study using experimental data from grating-based interferometry and propagation-based phase contrast combined with single-distance phase retrieval applied to a non-homogeneous sample is presented (acquired at beamline ID19-ESRF). It is shown that grating-based interferometry can handle density gradients in a superior manner. The study underlines the complementarity of the two techniques for practical applications.

scholarly journals Single-image phase retrieval using an edge illumination X-ray phase-contrast imaging setup

2015 ◽  
Vol 22 (4) ◽  
pp. 1072-1077 ◽  
Author(s):  
Paul C. Diemoz ◽  
Fabio A. Vittoria ◽  
Charlotte K. Hagen ◽  
Marco Endrizzi ◽  
Paola Coan ◽  
...  
Keyword(s):  
Phase Contrast ◽  
Phase Retrieval ◽  
Complex Refractive Index ◽  
Image Interpretation ◽  
Input Image ◽  
Phase Contrast Imaging ◽  
Research Subjects ◽  
Contrast Imaging ◽  
Homogeneous Sample ◽  
Imaging Setup

A method is proposed which enables the retrieval of the thickness or of the projected electron density of a sample from a single input image acquired with an edge illumination phase-contrast imaging setup. The method assumes the case of a quasi-homogeneous sample,i.e.a sample with a constant ratio between the real and imaginary parts of its complex refractive index. Compared with current methods based on combining two edge illumination images acquired in different configurations of the setup, this new approach presents advantages in terms of simplicity of acquisition procedure and shorter data collection time, which are very important especially for applications such as computed tomography and dynamical imaging. Furthermore, the fact that phase information is directly extracted, instead of its derivative, can enable a simpler image interpretation and be beneficial for subsequent processing such as segmentation. The method is first theoretically derived and its conditions of applicability defined. Quantitative accuracy in the case of homogeneous objects as well as enhanced image quality for the imaging of complex biological samples are demonstrated through experiments at two synchrotron radiation facilities. The large range of applicability, the robustness against noise and the need for only one input image suggest a high potential for investigations in various research subjects.

Near-field x-ray phase contrast imaging and phase retrieval algorithm

2005 ◽  
Vol 14 (4) ◽  
pp. 796-801 ◽  
Author(s):  
Zhu Hua-Feng ◽  
Xie Hong-Lan ◽  
Gao Hong-Yi ◽  
Chen Jian-Wen ◽  
Li Ru-Xin ◽  
...  
Keyword(s):  
Phase Contrast ◽  
Phase Retrieval ◽  
Near Field ◽  
Phase Contrast Imaging ◽  
Retrieval Algorithm ◽  
Contrast Imaging ◽  
X Ray ◽  
Phase Retrieval Algorithm

scholarly journals Comparison of two single-image phase-retrieval algorithms for in-line x-ray phase-contrast imaging

2012 ◽  
Vol 29 (12) ◽  
pp. 2667 ◽  
Author(s):  
Matthieu N. Boone ◽  
Wouter Devulder ◽  
Manuel Dierick ◽  
Loes Brabant ◽  
Elin Pauwels ◽  
...  
Keyword(s):  
Phase Contrast ◽  
Phase Retrieval ◽  
Phase Contrast Imaging ◽  
Single Image ◽  
Contrast Imaging ◽  
X Ray ◽  
Retrieval Algorithms

scholarly journals Phase retrieval and differential phase-contrast imaging with low-brilliance X-ray sources

2006 ◽  
Vol 2 (4) ◽  
pp. 258-261 ◽  
Author(s):  
Franz Pfeiffer ◽  
Timm Weitkamp ◽  
Oliver Bunk ◽  
Christian David
Keyword(s):  
Phase Contrast ◽  
Phase Retrieval ◽  
Phase Contrast Imaging ◽  
Contrast Imaging ◽  
X Ray ◽  
Differential Phase ◽  
Differential Phase Contrast

A phase retrieval algorithm for polychromatic x-ray in-line phase contrast imaging

2012 ◽  
Author(s):  
Xue-jun Guo ◽  
Xiao-lin Liu ◽  
Mu Gu ◽  
Chen Ni ◽  
Bo Liu ◽  
...  
Keyword(s):  
Phase Contrast ◽  
Phase Retrieval ◽  
Phase Contrast Imaging ◽  
Retrieval Algorithm ◽  
Contrast Imaging ◽  
X Ray ◽  
Phase Retrieval Algorithm
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