超低辐射台式X射线鬼像成像
Table-top X-ray Ghost Imaging with Ultra-Low Radiation
摘要：
X射线成像在医学和其他研究中的使用是众所周知的。一般情况下，成像质量与总通量成正比，但高光子能量会严重损伤样品，因此如何在保证成像质量的同时降低辐射剂量是一个根本问题。在“重影”成像中，从已知图案化照明场检索图像，并且通过桶检测器收集透射通过对象的总强度。利用台式X射线源实现了对平面和自然物体的单光子量级超低辐射鬼像成像。与传统的X射线成像相比，在相同的辐射剂量下，获得了更高的对比度噪声比。这种新技术可以大大减少生物样品的辐射损伤。
英文摘要：
The use of x-ray imaging in medicine and other research is well known. Generally, the image quality is proportional to the total flux, but high photon energy could severely damage the specimen, so how to decrease the radiation dose while maintaining image quality is a fundamental problem. In "ghost" imaging, an image is retrieved from a known patterned illumination field and the total intensity transmitted through the object collected by a bucket detector. Using a table-top x-ray source we have realized ghost imaging of plane and natural objects with ultra-low radiation on the order of single photons. Compared with conventional x-ray imaging, a higher contrast-to-noise ratio is obtained for the same radiation dose. This new technique could greatly reduce radiation damage of biological specimens.
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