Comparison of metal-induced image artifacts at 1.5 T and 3.0 T

Purpose: To compare image artifacts generated at 1.5 T and at 3.0 T by non-ferromagnetic metals. Method and materials: Copper wires and aluminum bars of different size, length and diameter as well as aneurysm clips were put into a phantom containing distilled water or NaCl-solution, respectively, doped with Gd-DTPA. Imaging was performed at 1.5 T and 3.0 T using gradient echo (GRE) as well as spin echo (SE) sequences. Repeated measurements with exchanged read out and phase encoding direction (swap) were performed to distinguish susceptibility artifacts and rf-induced artifacts. For the SE technique the imaging s…