Ping Chen is a Professor and Director of the Information Sensing and Processing Lab, Department of Information and Communication Engineering, North University of China, Taiyuan, Shanxi, China. He received his PhD degree in Signal Information Processing (2011) from North University of China. He was a post-doctor with Institute of Automation, Chinese Academy of Sciences from November 2012 to December 2016. His interests include computed tomography and X-ray imaging. He is the Guest Reviewer of the IEEE Photonics, IEEE Transactions on Instrumentation and Measurement, and Journal of X-ray Science and Technology. Now he received four NSFC awards about multi-spectrum CT imaging.