Abstract #2588

Comprehensive Assessment of Nonuniform Image Quality: Replication and Application to Metal Imaging at 0.55T

Ana Raquel Sanson Leon¹, Alexander R Toews^2,3, Bahadir Alp Barlas¹, Brian A. Hargreaves^2,3, and Krishna S. Nayak^1,4

¹Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, CA, United States, ²Department of Radiology, Stanford University, Stanford, CA, United States, ³Department of Electrical Engineering, Stanford University, Stanford, CA, United States, ⁴Alfred E. Mann Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, United States

Synopsis

Keywords: Artifacts, System Imperfections: Measurement & Correction, Analysis/Processing; MSK; Low-Field MRI

Motivation: To evaluate nonuniform image quality in 0.55T MRI.

Goal(s): To replicate a recently published method for comprehensive assessment of nonuniform image quality¹ in the context of imaging around metal at 0.55T.

Approach: A total hip arthroplasty (THA) implant and plastic replica were scanned using 2D-TSE and SEMAC. Intensity artifact, SNR, geometric distortion and spatial resolution maps were estimated.

Results: We successfully replicated a method for comprehensive assessment of nonuniform image quality, and demonstrate its ability to quantify intensity artifacts, geometric distortion, signal-to-noise ratio, and spatial resolution.

Impact: We demonstrate successful replication of the original methods paper, utilizing conventional 3D printing, a gyroid lattice phantom, and a THA phantom with a cobalt-chromium head, for the application to MRI near metallic implants at 0.55T.

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