Speaker: Fred Noo

Title: Image reconstruction in x-ray computed tomography.

Abstract:

The data acquisition geometry in x-ray computed tomography has evolved dramatically since the construction of the first CT scanner in 1972. Yesterday and still today, engineers work at developing new geometries which allows faster data acquisition with higher resolution for imaging with low motion artifacts. Each time a new geometry is introduced, it is needed to develop a new reconstruction algorithm that processes accurately the new data. In this talk, I will first review the principles of the 2D filtered-backprojection algorithm that was used before spiral CT. Then, I will discuss how this algorithm has been used to achieve reconstruction in spiral CT and later in multi-slice CT with the Siemens Sensation 16.