Keywords: Magnets (B0), Magnets (B0), Shims, Prostate
Motivation: Hip implants can cause significant B0 field inhomogeneities, which lead to artifacts in MRI, particularly impacting prostate imaging quality.
Goal(s): This study aims to quantify the B0 field distortion caused by hip implants in prostate MRI to improve imaging outcomes.
Approach: Using 33 CT-based human voxel models with detailed hip prosthesis designs, we calculated demagnetization fields and frequency shifts at 3 Tesla using the dipole method and Fast Fourier Transform.
Results: Hip implants increase frequency shifts and standard deviations in the B0 field within the prostate—about -600 Hz with a 175 Hz standard deviation—even though the prostate is 10 centimeters from the implant.
Impact: This study provides insights into mitigating B0 field distortions from hip implants, suggesting that solutions like DC shim coils could be employed to counteract susceptibility-induced artifacts in prostate MRI.
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