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.