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首页> 外文会议>Conference on Advances in Developments in X-Ray Tomography >Quantitative Boundary Reconstruction from Truncated Phase-Contrast Tomographic Projections
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Quantitative Boundary Reconstruction from Truncated Phase-Contrast Tomographic Projections

机译：截断相位对比断层摄影的定量边界重建

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Propagation-based phase-contrast tomography is a non-interferometric imaging technique that can reconstruct the complex refractive index distribution of an object. To accomplish such a reconstruction, however, the measured phase-contrast projections must be untruncated. We have demonstrated recently that the mathematical theory of local computed tomography (CT), which was originally developed for absorption CT, can be applied naturally for understanding the problem of reconstructing the location of image boundaries from truncated phase-contrast projections. In this work, we reveal that, for two-dimensional objects, the magnitude of refractive index discontinuities can be reconstructed from truncated phase-contrast projections acquired in the near-Fresnel zone. We show that these magnitudes can be reliably reconstructed using algorithms that were developed originally for local absorption CT.
机译：基于传播的相位对比度断层扫描是一种非干涉测量成像技术，其可以重建对象的复折射率分布。然而，为了实现这种重建，必须未被撤销测量的相位对比度投影。最近我们已经证明了最初用于吸收CT的局部计算断层扫描（CT）的数学理论，可以自然地应用于理解从截短的相位对比度投影重建图像边界的位置的问题。在这项工作中，我们揭示了，对于二维物体，可以从近菲涅耳区获取的截短相位对比度投影重建折射率不连续的大小。我们表明，可以使用最初用于局部吸收CT的算法可靠地重建这些大小。

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