X-ray phase-attenuation duality and phase retrieval

Phase retrieval is the key to quantitative x-ray phase-contrast imaging. To retrieve the phase image of an x-ray wave field, in general one needs multiple phase-contrast images. We have made a new observation of phase-attenuation duality for soft tissues, and we show how only a single phase-contrast...

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Bibliographic Details
Published in:Optics letters 2005-02, Vol.30 (4), p.379-381
Main Authors: Wu, Xizeng, Liu, Hong, Yan, Aimin
Format: Article
Language:English
Subjects:
Algorithms
Connective Tissue - diagnostic imaging
Mammography - methods
Phantoms, Imaging
Radiographic Image Enhancement - methods
Radiographic Image Interpretation, Computer-Assisted - methods
Radiography - methods
Refractometry - methods
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Summary:Phase retrieval is the key to quantitative x-ray phase-contrast imaging. To retrieve the phase image of an x-ray wave field, in general one needs multiple phase-contrast images. We have made a new observation of phase-attenuation duality for soft tissues, and we show how only a single phase-contrast image is needed for successful phase retrieval based on this duality. The phase-retrieval formula based on a single phase-contrast image of inhomogeneous soft tissue is derived and presented. We show the striking enhancement of the tissue contrast in simulated phase images that this new approach produces.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.30.000379