US 2007147575 A1 abstract methods systems and processes for providing efficient image reconstruction using local cone beam tomography which provide a reduced level of artifacts without suppressing the strength of the useful features and in a dynamic case provide reconstruction of objects that are undergoing a change during the scan an embodiment provides a method of reconstructing an image from cone beam data provided by at least one detector the method includes collecting cb projection data of an object storing the cb projection data in a memory and reconstructing the image from the local cb projection data in the reconstructing step a combination of derivatives of the cb projection data that will result in suppressing the artifacts are found the combination of derivatives includes collecting cone beam data that represents a collection of integrals that represent the object application_number US 58116006 A description before explaining the disclosed embodiments of the present invention in detail it is to be understood that the invention is not limited in its application to the details of the particular arrangements shown since the invention is capable of other embodiments also the terminology used herein is for the purpose of description and not of limitation c is a smooth curve defined by i s u2192 y s u2282 r 3 here fix an open set v whose closure v u2282.