X-ray phase-attenuation duality and phase retrieval
X-ray phase-attenuation duality and phase retrieval
复制标题
DOI：
10.1364/ol.30.000379
复制
发表时间：
2005-02-15
期刊：
影响因子：
3.6
通讯作者：
Yan, AM
中科院分区：
文献类型：
--
作者：
Wu, XZ;Liu, H;Yan, AM
位相恢复是X射线定量相衬成像的关键。为了提取X射线波场的位相图像，通常需要多幅位相对比图像。我们对软组织的相位-衰减对偶性进行了新的观察，并展示了基于这种对偶性，只需要一幅相位对比图像就可以成功地进行相位恢复。推导并给出了基于单幅非均匀软组织相衬图像的相位恢复公式。我们展示了这种新方法产生的模拟相位图像中组织对比度的显著增强。(C)2005年美国光学学会。
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. (C) 2005 Optical Society of America.