Continuous digital laminography

Digital X-ray laminography is a technique for generating sectional images of an object, using an X-ray source and detector that move in opposite directions in planes above and below the object. However, motion of the X-ray source and detector during acquisition causes blurring in the projection images, which in turn leads to blurred reconstructions. To prevent these motion artifacts, both the source and detector need to be still during the X-ray pulse which leads to longer acquisition times. In this paper, we consider a system for continuous digital laminography in which the X-ray source is continuously moving and emitting, which would allow for a higher rotation speed. The inherent motion related blurring in the projections is modeled in the reconstruction algorithm. A preliminary simulation experiment comparing the classical digital laminography with the proposed continuous technique indicates that a higher reconstruction quality can be achieved near the rotation center and less streak artifacts are present, at the cost of a decreasing tangential resolution with increasing distance from the rotation center.