X射线相位衬度成像

文章使用形象、生动、通俗、易懂的语言,介绍X射线相位衬度成像的基本概念,物理思想和方法,其中包括X射线的基本性质、光的波粒二象性、同步辐射X射线光源和常规非相干X射线光源的相位相干性,以及X射线相位衬度成像方法、三维成像的基本原理和相位衬度成像的最新进展,将抽象的相位、相位一阶导数和相位二阶导数概念与形象的光波阵面平移、倾斜和弯曲等形变联系在一起,着重介绍相位衬度成像发展中的创新思想,力图使读者能分享人类文明在这个学科发展中积累的精神财富.

X-ray phase contrast imaging

The basic concepts, physical pictures and techniques used in the development of X-ray phase contrast imaging are expounded, including the wave and corpuscular dual properties of light, the concept of phase, and the coherence of conventional and synchrotron radiation X-ray sources. The methods of X-ray phase contrast imaging, the basic principle of 3D imaging, and the latest progress of phase contrast imaging are also discussed. For a better understanding of the progress in this innovative new technique the rather abstract concepts of the first order and second order derivatives of phase are related to the displacement, the tilting and bending distortion of the wave front of the propagating light.