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Abstract #4217

A multi-spectral imaging template of hip arthroplasty showing distribution of 3T vs. 1.5T artifacts in the acetabulum of varying implants

Andrew S. Nencka1, Peter S. Johnson1, and Kevin M. Koch1
1Radiology, Medical College of Wisconsin, Milwaukee, WI, United States

An average proton density weighted template of the hip with arthroplasty was developed, and multi-spectral images from patients acquired at both 1.5T and 3.0T were registered to it. As a proof-of-concept, maps of residual metal artifact were transformed into the template space and, for different implant compositions, probability maps of residual artifact were generated. Ceramic implants exhibit minimal cross-field artifact differences, while metal-on-metal implants show more profound differences and metal-on-poly implants exhibit more moderate differences. This template and registration software lays the foundation for future quantitative analysis of cross-session and cross-subject imaging of hip arthroplasty.

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