X-ray imaging using a tunable coherent X-ray source based on parametric X-ray radiation
X-ray imaging using a tunable coherent X-ray source based on parametric X-ray radiation
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DOI：
10.1088/1748-0221/8/08/c08001
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发表时间：
2013-08
影响因子：
1.3
通讯作者：
Y. Hayakawa;Y. Takahashi;T. Kuwada;T. Sakae;Toshinari Tanaka;K. Nakao;K. Nogami;M. Inagaki;K. Hayakawa;I. Sato
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文献类型：
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作者：
Y. Hayakawa;Y. Takahashi;T. Kuwada;T. Sakae;Toshinari Tanaka;K. Nakao;K. Nogami;M. Inagaki;K. Hayakawa;I. Sato
一种基于参量X射线辐射（PXR）的新型X射线源已被日本大学电子束研究与应用实验室（LEBRA）用于X射线成像。PXR的显著特点是能量可调、具有空间啁啾的单色性、窄的局域带宽和空间相干性。由于来自PXR系统的X射线束具有均匀通量密度的大照射区域，因此基于PXR的源适合于X射线成像，特别是适用于相衬成像。尽管锥形X射线束，衍射增强成像（DEI）可以用作相衬成像技术。DEI实验使用14至34 keV的X射线进行，并获得相位梯度图像。结果表明，PXR作为一种X射线源的能力相衬成像与一个大的照射野归因于锥束效应。考虑到LEBRA-PXR源的重要特性，结果表明可能构建紧凑的直线加速器驱动的PXR成像仪器及其在医学诊断中的应用。
A novel X-ray source based on parametric X-ray radiation (PXR) has been employed for X-ray imaging at the Laboratory for Electron Beam Research and Application (LEBRA), Nihon University. Notable features of PXR are tunable energy, monochromaticity with spatial chirp, narrow local bandwidth and spatial coherence. Since the X-ray beam from the PXR system has a large irradiation area with uniform flux density, the PXR-based source is suited for X-ray imaging, especially for application to phase-contrast imaging. Despite the cone-like X-ray beam, diffraction-enhanced imaging (DEI) can be employed as a phase contrast imaging technique. DEI experiments were performed using 14- to 34-keV X-rays and the phase-gradient images were obtained. The results demonstrated the capability of PXR as an X-ray source for phase-contrast imaging with a large irradiation field attributed to the cone-beam effect. Given the significant properties of the LEBRA-PXR source, the result suggests the possible construction of a compact linac-driven PXR-Imaging instrument and its application to medical diagnoses.