are used to stop or prevent an aneurysm from bleeding. MRI is an ideal
technique to diagnose aneurysms. Unfortunately, treatment assessment by MRI
after surgical placement of an aneurysm clip is complicated due to the presence of
the metal clip. The clip's high magnetic susceptibility causes severe,
orientation dependent, variations in the local magnetic field. Often this
results in pronounced MR image distortions including signal voids. The study
presented here shows how ultra-short and zero echo time experiments could be
used to minimize these artifacts.