A block-eliminating method by limited-view scan in a dynamic CT system for running aero-engine

In order to detect the deformations and monitor inner structures during operation more effectively, an innovative CT system making use of the objects' self-rotation is designed by us. However, some parts remain static and they contaminate the reconstruction image with ring artifacts. In this paper, we put forward a method taking advantage of limited-angle scan to get the prior image, then using interactive image registration and forward projection to eliminate these artifacts. Both numerical and experimental researches are presented to verify the feasibility of the method.