Abstract #0611

7 Tesla MRI of the knee joint after anterior cruciate ligament graft reconstruction: safety discussion and image quality study

Oliver Kraff¹, Jens M Theysohn², Jana Theisejans³, and Harald H Quick^1,4

¹Erwin L Hahn Institute for MRI, University Duisburg-Essen, Essen, Germany, ²Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Essen, Germany, ³General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), University Duisburg-Essen, Duisburg, Germany, ⁴High-Field and Hybrid MR Imaging, University Hospital Essen, Essen, Germany

Synopsis

Keywords: Safety, ArtifactsThis study presents the MR safety discussion for imaging subjects with metallic fixation buttons after reconstruction of the anterior cruciate ligament, which have not been labeled MR conditional at 7T by the implant vendor. In addition, image quality and artifacts are evaluated in a knee imaging protocol consisting of both gradient- and spin echo sequences. Two imaging cases are presented: one with 7T imaging before and after surgery, and another case with comparative imaging between 1.5T and 7T. Artifact sizes from metallic fixation buttons at the femur did not impair the image quality and diagnostic evaluation of the knee joint.

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