X射线相位衬度CT指的是在通过X射线光源来对物体进行成像过程中使用图像的位相衬度来反映物体的密度或者厚度分布,适用于弱吸收物体,还可以减少吸收剂量,放宽成像条件中光源强度的限制和减少对样品(尤其是生物样品)的损伤.介绍了目前用于X射线相位衬度CT的三种方法,实验及图像重建的过程,并分析了各自的优缺点.
参考文献
| [1] | Bronnikov Andrei V. Theory of quantitative phase-contrast computed tomography [J]. J. Opt. Soc. Am. A, 2002,19: 3. |
| [2] | Spanne P, Raven C, Snigireva I, et al. In-line holography and phase-contrast microtomography with high energy X-rays [J]. Phys. Med. Biol., 1999, 741-749. |
| [3] | Gureyev T E, Pogany A, Paganin D M, et al. Linear algorithms for phase retrieval in the Fresnel region [J]. Opt.Comm., 2004, 231: 53-70. |
| [4] | Gureyev T E. Composite techniques for phase retrieval in the Fresnel region [J]. Opt. Comm., 2003, 220: 49. |
| [5] | Bonse U, Hart M. An X-ray interferometer [J]. Appl. Phys. Lett., 1965, 6: 155. |
| [6] | Takeda M, Ina H, Kobayashi S. Fourier transform methods of fringe-pattern analysis for compter-based topography and interferometry [J]. J. Opt. Soc. Am., 1982, 72: 156. |
| [7] | Bruning J H, Herriott D R, Gallagher J E, et al. Digital wavefront measuring interferometer for testing optical surfaces and lenses [J]. Appl. Opt., 1974, 13: 2693. |
| [8] | Dav T J, Gao D, Gureyev T E, et al. Phase-contrast imaging of weakly absorbingmaterials using hard X-rays [J].Nature, 1995, 373: 595-8. |
| [9] | Wilkins S W, Gureyev T E, Gao D. Phase-contrast imaging using polychromatic hard X-rays [J]. Nature, 1996,384: 335-338. |
| [10] | Chapman D, Thomlinson W, Johnston R E, et al. Diffraction enhanced X-ray imaging [J]. Phys. Med. Biol.,1997, 42: 2015-2025. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%