Wang, Feixiang; Li, Ke; Xu, Mingwei; Ju, Xiaolu; Xiao, Tiqiao

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT

2023, 1055, 1872-9576

Wang, Feixiang; Li, Ke; Xu, Mingwei; Ju, Xiaolu; Xiao, Tiqiao

Aiming at imaging to weak signals in a complex system, we proposes a method called move contrast X-ray imaging, which takes advantage of the time evolution of modulation of each moving component to incident light field in a complex system,to differentiate the components and image them separately. Accordingly, the mutual interference between components is eliminated and the sensitivity to weak signals is improved significantly. Experimental results of angiography with low agent dose, agent-free imaging of water refilling along microvessels in plant branch, sensitive tracking to ion migration in an electrolytic cell, and ultrafast imaging of cavitation evolution, demonstrate the practicability of move contrast X-ray imaging of weak signals in complex systems while traditional methods fail. The proposed method may find extensive applications in X-ray tracking imaging of targets in complex background.