Woodruff School of Mechanical Engineering

NRE 8011/8012 and MP 6011/6012 Seminar

Nuclear & Radiological Engineering and Medical Physics Programs


CT Image Reconstruction Methods


Dr. Xiangyang Tang




Thursday, February 11, 2010 at 11:00:00 AM


Boggs Building, Room 3-47 (3rd FL)


Farzad Rahnema


The advent of cone-beam volumetric CT has been speeding up the progresses in diagnostic imaging. To meet the challenges imposed by advanced applications, all CT vendors have been striving to advance the performance of their state-of-the-art CT scanners in every aspect – temporal, spatial, contrast and spectral – resolutions. Recognizing the increasing concern about the radiation rendered by CT to the population, every CT vendor has been exploring various dose reduction techniques. Along with an introduction to the imaging chain of CT system and the factors influencing its performance, the seminar will cover data acquisition, image reconstruction and processing solutions that are enabling advanced clinical applications. By taking cardiovascular imaging – the most challenging clinical application – as an example, a cross-vendor survey will be given on distinct technological features of each vendor’s flagship scanner. Moreover, the research opportunities to explore novel CT technologies in addressing clinical challenges in diagnostic imaging and image guided radiation therapy (IGRT) will be envisioned. Finally, the potential of x-ray CT for molecular imaging and other pre-clinical applications via the physical mechanism beyond x-ray attenuation and photon integration will be speculated.


Dr. Xiangyang Tang joined the Department of Radiology at Emory University in Feb., 2009, after he spent 8 years as senior scientist with the Applied Science Lab of GE Healthcare. As a scientist in the industry, he has attained extensive experience in CT imaging, especially in system architecture design and integration, image reconstruction, cardiovascular imaging and IGRT, and radiation dose reduction. Since his joining Emory Radiology, Dr. Tang has been focusing on developing novel CT/micro-CT architecture to achieve high spatiotemporal resolution using motion compensated image reconstruction. Aimed at enhancing its role for molecular imaging, he has also been devoted to extending CT/micro-CT’s capability by taking advantage of the fast and exciting progresses in nanotechnology. (Dr. Tang earned his PhD degree from University of Rochester in 2002. In addition to the publication of more than 70 papers in journals or conferences, 15 US patents have been issued under his name. As an active contributor, he has been serving the scientific community as guest/acting editor and reviewer of journals and conferences, and panel member of program committee and NIH and DoD grant review study sections.)


Refreshments will be served.