Abstract #2650

Imaging Near Metallic Implants: Initial 0.55T vs. 3T MRI Comparison in Hip Implant Patients

Kübra Keskin¹, Sophia X. Cui², Bochao Li³, Jordan S. Gross⁴, Zorica Buser⁵, Jay R. Lieberman⁶, Brian A. Hargreaves^7,8,9, and Krishna S. Nayak^1,3

¹Electrical and Computer Engineering, University of Southern California, Los Angeles, CA, United States, ²Siemens Healthineers, Los Angeles, CA, United States, ³Biomedical Engineering, University of Southern California, Los Angeles, CA, United States, ⁴Diagnostic Radiology, University of California Los Angeles, Los Angeles, CA, United States, ⁵Gerling Institute, New York, NY, United States, ⁶Orthopaedic Surgery, University of Southern California, Los Angeles, CA, United States, ⁷Radiology, Stanford University, Stanford, CA, United States, ⁸Electrical Engineering, Stanford University, Stanford, CA, United States, ⁹Bioengineering, Stanford University, Stanford, CA, United States

Synopsis

Keywords: Artifacts, Low-Field MRI, Artifacts, MSK, Metallic Implants, Susceptibility, Multi-Spectral Imaging, SEMAC, Metal artifacts

Motivation: Patients with orthopedic metallic implants often require diagnostic imaging to evaluate adjacent tissues. MRI performance, including artifact levels and SNR, varies with field strength.

Goal(s): To compare 0.55T and 3T MRI for imaging patients with total hip arthroplasty (THA).

Approach: Patients with THA were scanned with similar protocols at 0.55T and 3T, including multi-spectral imaging (MSI). We qualitatively compared the images from both scanners.

Results: Metal artifact severity was reduced at 0.55T compared to 3T at the expense of SNR. Diagnostic imaging of patients with titanium hip implants at 0.55T is possible without MSI.

Impact: We qualitatively compared 0.55T and 3T image quality in patients with hip replacements. Our findings indicate that 0.55T MRI offers substantially reduced metal artifacts and advanced multi-spectral techniques may not be required in many cases.

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