Towards Improving the Statscan X-Ray Image Quality through Sliding-Mode Control of the C-Arm

摘要

A method to improve image quality of the Statscan™ X-ray system is investigated. Transient errors in the trapezoidal motion profile of the scanning C-arm may cause mismatches between the detector and collimated beams from the X-ray source. This results in the partial degradation of image quality. The performances of two C-arm motion controllers were investigated using computer simulations and experiments: a standard PI and DMRISMC. The controllers are competitive at high sampling rate. However, the DMRISMC controller shows better performance motion profile tracking when slow sampling rate is used. There are strengths and weaknesses for both controllers and DMRISMC was expected to improve the image quality.