Abstract #2006

Spectrally-encoded multi-spectral imaging (SEMSI) at 0.55T provides improved imaging adjacent to metallic implants

Bochao Li¹, Kübra Keskin², Daehyun Yoon³, Nam Gyun Lee¹, Brian Hargreaves³, and Krishna Shrinivas Nayak²

¹Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, United States, ²Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, CA, United States, ³Stanford University, Stanford, CA, United States

Synopsis

Keywords: Artifacts, Low-Field MRI, MetalSpectrally-encoded multi-spectral imaging (SEMSI) enables imaging adjacent to metal implants without blurring due to off-resonance, and has been demonstrated at 3T. Here, we demonstrate application of this technique at 0.55T with appropriate adjustments to the spectral resolution and RF pulse bandwidth. A total hip arthroplasty phantom was imaged with SEMSI, turbo spin echo (TSE), and Slice Encoding for Metal Artifact Correction (SEMAC). Experiments demonstrate the feasibility of SEMSI at 0.55T, and examine ΔTE to support multi-echo acquisitions in a single TR.

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