@inproceedings {gvgompelDefrisedvandyck2006, title = {Elliptical Extrapolation of Truncated 2D CT Projections using Helgason-Ludwig consistency conditions}, booktitle = {SPIE Medical Imaging: Physics of Medical Imaging}, series = {Proceedings of the SPIE}, volume = {6142}, year = {2006}, month = {February}, pages = {1408-1417}, address = {San Diego, Californa, USA}, author = {Gert Van Gompel and M. Defrise and Dirk Van Dyck}, editor = {Flynn, Michael J.; Hsieh, Jiang.} }