X-ray Phase-Contrast Radiography and Tomography with a Multiaperture Analyzer
X-ray Phase-Contrast Radiography and Tomography with a Multiaperture Analyzer
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DOI：
10.1103/physrevlett.118.243902
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发表时间：
2017-06-14
影响因子：
8.6
通讯作者：
Olivo, A.
中科院分区：
文献类型：
--
作者：
Endrizzi, M.;Vittoria, F. A.;Olivo, A.
我们提出了一个多孔径分析仪设置执行X射线相衬成像在平面和三维模式。该方法是基于强结构的X射线束与振幅调制器，在它到达样品之前，并在检测之前的多孔径分析元件。一个多切片表示的样品被用来建立一个定量的投影图像和相应的三维分布之间的关系，导致成功的断层重建。样品的吸收，相位和散射检索从五个强度投影的测量。该方法在定制的同步辐射体模上进行了测试：样品吸收和相位也可以与强散射体结合可靠地恢复，同时获得高灵敏度和动态范围。
We present a multiaperture analyzer setup for performing x-ray phase contrast imaging in planar and three-dimensional modalities. The method is based on strongly structuring the x-ray beam with an amplitude modulator, before it reaches the sample, and on a multiaperture analyzing element before detection. A multislice representation of the sample is used to establish a quantitative relation between projection images and the corresponding three-dimensional distributions, leading to successful tomographic reconstruction. Sample absorption, phase, and scattering are retrieved from the measurement of five intensity projections. The method is tested on custom-built phantoms with synchrotron radiation: sample absorption and phase can be reliably retrieved also in combination with strong scatterers, simultaneously attaining high sensitivity and dynamic range.