Phase retrieval in propagation-based X-ray imaging beyond the limits of transport of intensity and contrast transfer function approaches

被引:0
作者
Farago, Tomas [1 ]
Spiecker, Rebecca [1 ,2 ]
Hurst, Mathias [1 ]
Zuber, Marcus [1 ]
Cecilia, Angelica [1 ]
Baumbach, Tilo [1 ,2 ]
机构
[1] Karlsruhe Inst Technol, Inst Photon Sci & Synchrotron Radiat, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany
[2] Karlsruhe Inst Technol, Lab Applicat Synchrotron Radiat, Kaiserstr 12, D-76131 Karlsruhe, Germany
关键词
TOMOGRAPHY; DAMAGE;
D O I
10.1364/OL.530330
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We derive a phase retrieval formula for propagation-based phase contrast X-ray imaging that does not require weakly attenuating objects or short propagation distances. It is directly applicable to both single- and multiple-distance scenarios. We show the validity conditions and study the error of the underlying mutual intensity approximation, which uses the common assumptions of weak phase shift variations and phase-attenuation duality. The approximation generalizes those behind the transport of intensity (TIE) and contrast transfer function (CTF) models, and it approaches them when their respective additional assumptions are satisfied. When they are not, it clearly outperforms them, which we show both theoretically and practically on synthetic and measured data.
引用
收藏
页码:5159 / 5162
页数:4
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