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 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.
Wu
Xizeng
X
Department of Radiology, University of Alabama at Birmingham, 619 19th Street South, Birmingham, Alabama 35233, USA. xwu@uabmc.edu
Liu
Hong
H
Yan
Aimin
A
D000465:Algorithms; D003238:Connective Tissue / Q000000981:diagnostic imaging*; D008327:Mammography / Q000379:methods; D019047:Phantoms, Imaging; D011856:Radiographic Image Enhancement / Q000379:methods*; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D011859:Radiography / Q000379:methods*; D012031:Refractometry / Q000379:methods*