Postimplantation MRI with cylindric and cubic intervertebral test implants: evaluation of implant shape, material, and volume in MRI artifacting--an in vitro study.

摘要: Abstract Background context Interbody spacers for anterior spine fusion are made of different materials, which can affect the postfusion magnetic resonance imaging (MRI) scans. Susceptibility artifacts specially metallic implants decrease image quality. Purpose This study focused on influence determined implant parameters like shape, volume, and material in MRI artifacting with regard to solid geometrical titanium carbon test spacers. Study design/setting A comparative an vitro model. The was performed at a university research facility. Methods In this we evaluated postimplantation scans three cuboids six cylinders, were alloy fiber reinforced polymer. carried out by using T1 turbo spin echo (TSE) sequences. total artifact volume (TAV) as well median area (MAA) calculated. Additionally (IV)/TAV cross-sectional (CSA)/MAA relation determined. Statistical analyses calculated t Newman-Keuls multiple comparisons. Results Considering all increasing size, TAV MAA became significantly larger (p Conclusions clearly affected material, volume. Independent more advantageous IV/TAV CSA/MAA relation, rate limited implant's direct surroundings. On basis high magnetizability equal IV, range implant-related susceptibility influenced shape favor cylindric implants. According very low implants, did not have any significant effect behavior.