A control method of electron beam scanning track and scanning mode was put forward, in which the curvilinear equations describing the electron beam scanning track were established according to the shape of the actual welding seam, the size of scanning region, scanning mode etc.

Under the conventional CT scanning mode, some specimens with the flat-type can t fulfill the CT reconfiguration because they are failing to get the complete projection being restricted by the rotated space or detector s dynamic scope.

Since 45°rotation scanning mirror is the most mature and common photo-mechanical scanning mode, having the wide range of applications in the satellite remote sensor.

Various scanning mode is built in the system, which offers system-level support for the most common scan mode, a.

Based on the study on the scanning mode of STM,the “Coincidence Scanning Mode”is described in this paper.

This paper introduces briefly the recent progress in research of these three aspects at the Computer Tomography Laboratory of Capital Normal University, includimg several new scanning modes and their corresponding reconstruction algorithms, the research of X-ray energy-spectrum, GPU-based analytical reconstruction algorithms and iterative reconstruction algorithms, artifacts formation mech.

The change regularity of emergence angle is analyzed emphatically under scanning mode.