题目：General Cone-beam & Interior Reconstruction in X-ray CT

时间：2012年12月4日（周二）下午2:30~4:30

地点：北辰校区西二教学楼4楼407会议室

热忱欢迎各位老师、同学参加！

      Title: General Cone-beam & Interior Reconstruction inX-ray CT

Abstract:  Given the importance of the so-called long object problem, spiral cone-beam computed tomography (CT) has been a hot area in the CT field for the past decade.   As a main stream in the development of the next generation medical CT, spiral cone-beam CT has been greatly improved in terms of reconstruction methods since it was first proposed in 1991. Now, the state-of-the-art cone-beam algorithms can reconstruct images exactly from severely truncated data collected in rather flexible geometrical settings. Here we will first present an overview of this area with an emphasis on our group’s results. Since 2006, we have been working on the quasi-short object problem. The motivation is to enable localized yet faithful reconstruction of a region of interest (ROI) within a long or large object. While conventional wisdom states that the interior problem is not uniquely solvable, our group proved and demonstrated that the interior problem can be solved in a theoretically exact and  numerically stable fashion aided by practical prior information. In this talk, we will also present our latest results in this aspect. Throughout this presentation, we will underline the major relevance of our proposed imaging methods to important biomedical applications and other tomographic imaging modalities (e.g. PET, SPECT, MRI), and welcome your feedback.

Biography: Dr. Hengyong Yu received his Bachelor’s degrees in information science & technology (1998), computational mathematics (1998), and his PhD in information & telecommunication engineering (2003) from Xi’an Jiaotong University. He was an Instructor and Associate Professor with theCollegeofTelecommunication Engineering,HangzhouDianziUniversity, from July 2003 to September 2004. During September 2004 and November 2006, he was a postdoctoral fellow and Associate Research Scientist with the Department of Radiology,University of Iowa,IowaCity, IA. During November 2006 and May 2010, he was a Research Scientist, the Associate Director of CT Lab, Biomedical Imaging Division, VT-WFU School of Biomedical Engineering & Sciences, Virginia Tech,Blacksburg,VA,USA. Currently, he is am an Assistant Professor, the Director of CT Lab, Departments of Radiology and Biomedical Engineering, Wake Forest University Health Sciences, Winston-Salem, NC, USA. His interests include computed tomography and medical image processing. He has authored or coauthored >90 peer-reviewed journal papers. He serves as the Editorial Board member of Signal Processing, Journal of Medical Engineering, CT Theory and Applications, International Journal of Biomedical Engineering and Consumer Health Informatics and Open Medical Imaging Journal, and Guest Editor of the International Journal of Biomedical Imaging for the special issue entitled “Development of Computed Tomography Algorithms”. He is senior member of the Institute of Electrical and Electronics Engineers (IEEE) and the IEEE Engineering in Medicine and Biology Society (EMBS), and member of American Association of Physicists in Medicine (AAPM) and the Biomedical Engineering Society (BMES). In 2005, he was honored for an outstanding doctoral dissertation by Xi’an Jiaotong University, and received the first prize for a best natural science paper from the Association of Science & Technology ofZhejiangProvince. In January 2012, he received an NSF CAREER award for development of CS-based interior tomography.