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Abstract #3488

The Optimizations of SEMAC-VAT Technique for Magnetic Resonance Imaging of Total Knee Prosthesis: Comparison of 1.5T and 3T for Different Metal Materials

Tao AI1, Frank F. Goerner2, Abraham Padua3, Mathias Nittka4, Xiaoming Li1, Val M. Runge5

1Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China; 2Radiology, University of Texas Medical Branch (UTMB), Galveston, TX, United States; 3Healthcare Sector, Siemens AG, Malvern, PA, United States; 4Healthcare Sector, Siemens AG, Erlangen, Deutschland, Germany; 5Editor-in-Chief of Investigative Radiology, Galveston, TX, United States

In vitro agarose phantom and animal tissue phantom with three different types of clinically wide-used metal materials were scanned by SEMAC-VAT with a range of SEMAC-encoding steps, high bandwidth and conventional 2D TSE sequence at both 1.5T and 3T. The performance of SEMAC-VAT technique in metal artifact correction was evaluated by both quantitative and qualitative analysis. The results demonstrated SEMAC-VAT significantly reduced metal artifact due to different metal materials and optimal SEMAC-encoding steps of 15-20 for Cobalt chromium and 5-10 for both Oxidized Zirconium and Titanium were recommended for clinical use.