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

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 for metallic implants can decrease the image quality. Purpose This study focused on the...

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Bibliographic Details
Published in:The spine journal 2007-05, Vol.7 (3), p.353-359
Main Authors: Ernstberger, Thorsten, MD, Heidrich, Gabert, MD, Buchhorn, Gottfried, Bioengineer
Format: Article
Language:English
Subjects:
Animals
Carbon
Implant parameters
In Vitro Techniques
Interbody test implants
Intervertebral Disc - surgery
Magnetic Resonance Imaging
MRI artifacting
Orthopedics
Prostheses and Implants
Spinal Fusion - instrumentation
Spine
Swine
Titanium
Total artifact volume
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Summary: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 for metallic implants can decrease the image quality. Purpose This study focused on the influence of determined implant parameters like shape, implant volume, and implant material in MRI artifacting with regard to solid geometrical titanium and carbon test spacers. Study design/setting A comparative study on an in vitro spine model. The study was performed at a university research facility. Methods In this study we evaluated the postimplantation MRI scans of three determined cuboids and six cylinders, which were made of titanium alloy and carbon fiber reinforced polymer. MRI scans were carried out by using T1 turbo spin echo (TSE) sequences. The total artifact volume (TAV) as well as median artifact area (MAA) were calculated. Additionally the implant volume (IV)/TAV and cross-sectional area (CSA)/MAA relation were determined. Statistical analyses were calculated with the t test and Newman-Keuls test for multiple comparisons. Results Considering all test implants with an increasing implant size, the TAV and the MAA became significantly larger (p
ISSN:1529-9430
1878-1632
DOI:10.1016/j.spinee.2006.03.016