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Abstract #3232

Effect of Cranial Fixation Plates on Brain MR Imaging at 7T in Neurosurgical Patients

Bixia Chen 1,2 , Tobias Schoemberg 1,2 , Oliver Kraff 1 , Andreas K. Bitz 1,3 , Harald H. Quick 1,4 , Mark Edward Ladd 1,3 , Ulrich Sure 2 , and Karsten Henning Wrede 1,2

1 Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen, Essen, NRW, Germany, 2 Department of Neurosurgery, University Hospital Essen, University Duisburg-Essen, Essen, NRW, Germany, 3 Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, BW, Germany, 4 High Field and Hybrid MR Imaging, University Hospital Essen, University Duisburg-Essen, Essen, NRW, Germany

The importance of ultra-high-field MRI in neuroimaging is increasing rapidly. Titanium cranial fixation plates (CFP) are commonly used during neurosurgical operations, and have been considered MR-conditional in simulations and head model studies. We evaluated imaging artifacts in multiple sequences correlated to CFP in vivo. Five patients were examined before, within 72 hours after, and 3 months after surgery at 3T, and in a 7T whole-body MR system using an 8-channel RF head coil. CFP caused minor artifacts in TOF and MPRAGE at 7T, depiction of adjacent brain tissue was impaired in SWI due to susceptibility artifacts, comparable with 3T artifacts.

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