Affiliations: Department of Radiology, University of Alabama at
Birmingham, Birmingham, AL, USA | Center for Bioengineering and School of Electrical and
Computer Engineering, University of Oklahoma, Norman, OK, USA
Note: [] Corresponding author: Xizeng Wu, Ph.D., Department of Radiology,
University of Alabama at Birmingham, 619 19th ST S, GSB 301, Birmingham,
AL 35249, USA. E-mail: xwu@uabmc.edu
Abstract: In this work we study the robustness of a phase-retrieval approach,
which is based on the phase-attenuation duality. We discuss the critical
importance of retrieval robustness for diagnostic imaging in perspective of the
radiation dose limit and lesion-detection sensitivity. We compare the
robustness of duality-based phase retrieval with that of the transport of
intensity equation (TIE)-based phase-retrieval approach, and we show by means
of simulation that the duality-based retrieval approach is superior to the
TIE-based approach. A generalization of TIE per se is presented for
incorporating the coherence degree of incident x-ray wavefield.
