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Abstract #3484

Simulation of B0 field conditions in the human prostate with existing hip implant

Hao Liang1,2, Changzhe Liu1,3, Ming Lu1,2, and Xinqiang Yan1,2,3
1Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, United States, 2Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, United States, 3Department of Electrical and Computer Engineering, Vanderbilt University, Nashville, TN, United States

Synopsis

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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