Cone beam artifacts can be completely avoided with the use of spiral  tomography. In this special process, a translational motion is performed in the direction of the rotary axis at the same time as the rotation of the object. The long measurement time, caused by the helical motion, currently pre- vents this method from being in widespread use.  Measurement errors that are caused by cone beam artifacts can also be eliminated using Autocorrection.  There are also methods for numerically determining the scattered   radiation and other causes of artifacts by simulation, for example using the CAD model or the volume of the tomographically scanned work piece. The tomography scan is simulated twice, once with artifacts and once without (VAC: Virtual Autocorrection). The measurement results are then corrected using the difference between the two simulations. This method is optimized with better understanding of the under- lying physical effects; in the future, artifacts will be nearly entirely compensated.   Such methods require substantial computation time, however, and are only gradually becoming practical with the availability of faster processors.