X ray differentiation interference phase contrast imaging system

X射线微分干涉相衬成像系统

Abstract

本发明涉及一种X射线微分干涉相衬成像系统。适用于医学和无损探伤等领域。系统组成中按照X射线传播方向包括X射线管、滤波器、样品台、相位光栅及X射线探测器,系统中还包括微机和配套的系统管理软件,关键在于:①系统中采用的X射线管中具有呈平行线状分布的、相干高能X射线发射体,发射角为30-50度。②所采用的X射线探测器具有分析光栅和探测器的双重功能,基本组成中包括平行线阵列式X射线转换屏、中继光学系统和面阵探测器或包括平行线阵列式光电导X射线探测器,X射线转换屏或光电导X射线探测器其结构组成和尺寸与上述X射线管中呈平行线状分布的、相干高能X光源及相位光栅对应配套。
The invention relates to an X-ray differential interference phase contrast imaging system, which is applicable to the fields such as medicine and nondestructive flaw detection, and the like. According to the transmission direction of X-ray, the system consists of an X-ray tube, a filter, a sample platform, a phase grating and an X-ray detector; the system also comprises a micro-computer and matched system management software. The key point is that (1) the X-ray tube adopted in the system is provided with a plurality of coherent high-energy X-ray emitters which are distributed linearly in parallel and have the emission angle of 30-50 degrees; (2) the adopted X-ray detector has dual functions of an analysis grating and a detector; the system basically consists of a parallel array-typed X-ray conversion screen, a relay optical system and a flat-panel detector or a parallel array-typed photoelectron-conductive X-ray detector; the structure and the dimension of the X-ray conversion screen or the photoelectron-conductive X-ray detector are correspondingly matched with the structure and the dimension of the coherent and high-energy X-ray light sources and the phase grating distributed linearly in parallel in the X-ray tube.

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