Xiaochuan Pan Department of Radiology University of Chicago "Volumetric Computed Tomography and Its Applications" Thursday March 24th, 12:20-1:10, Tate 150 Before: Lunch in IMA reception area, 4th floor Lind Hall, 11:30-12:15

Description
Computed tomography (CT) is one of the most widely used imaging modality in medicine and other areas. In this lecture, following the introduction of the basic principle of CT, I will describe what physical quantity is measured and how an image is reconstructed from the measured data in CT. Based upon such knowledge about CT, I will tour recent advances of CT technology and their new biomedical applications. One of such important advances is the advent of helical cone-beam CT and the breakthroughs in imaging theory associated with it. These technological and theoretical advances in CT have brought immediate important impact on medical and other applications of CT, offering tremendous opportunities to design innovative imaging protocols and applications that are otherwise impossible. One of the important trends in CT imaging is the so-called targeted imaging of a region of interest (ROI) within the subject from truncated data. Such a strategy for targeted imaging would substantially reduce the radiation dose delivered to the subject and scanning effort. I will discuss the theory and algorithms that we have developed recently for exact reconstruction of ROI images. Finally, I will touch upon the implications of these new developments in CT imaging theory for other tomographic imaging modalities.