Fig 4.

Sample FDCT images of various metallic objects causing streak artifacts and the application of the MAR algorithm. A and E, Onyx embolization of an intracranial AVM. The MAR algorithm was less effective at reducing the artifacts caused by Onyx. B and F, A bullet lodged within the cervical spine. C and G, A vascular clip used to treat an intracranial aneurysm. D and H, Stent-assisted coil embolization of an intracranial aneurysm. This example is similar to the phantom model created to evaluate the MAR algorithm. The stent is completely obscured by the metal artifacts but is visible after the application of the MAR algorithm.