Abstract #1678
Approach to characterize magnetic inhomogenities for development of MRI sequences near metallic prostheses
Matthew R. Smith 1 , Nathan S. Artz 1 , and Scott B. Reeder 1,2
1
Radiology, University of Wisconsin, Madison,
Wisconsin, United States,
2
Biomedical
Engineering, University of Wisconsin, Madison, WI,
United States
Metallic implants induce extremely large B0 field
perturbations that cause severe signal distortion. The
purpose of this work is to examine the theoretically
induced field map perturbation using the digital
representation of commercially available metallic joint
prostheses. Simulations presented here demonstrate that
both RF excitation and frequency encoding is highly
problematic for these implants using current 3D-MSI
methods at both field strengths. Fully phase encoded
methods may help with the frequency-encoding distortion
but not with RF excitation limitations.
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