Abstract #2194

High Resolution Simulation and Measurement of Phase-Specific B0 Field Conditions Across the Human Cardiac Cycle

Yun Shang¹, Martin Gajdosik¹, Sebastian Theilenberg¹, Laura M. Schreiber^2,3, and Christoph Juchem^1,4

¹Department of Biomedical Engineering, Columbia University, New York, NY, United States, ²Chair of Cellular and Molecular Imaging, Comprehensive Heart Failure Center, University Hospital Wuerzburg, Wuerzburg, Germany, ³Department of Cardiovascular Imaging, Comprehensive Heart Failure Center, University Hospital Wuerzburg, Wuerzburg, Germany, ⁴Department of Radiology, Columbia University, New York, NY, United States

B₀inhomogeneity leads to dark band artifacts in cardiac MRI, in particular with the use of SSFP pulse sequences. Limited spatial resolution of MRI-derived B₀ maps prevents the systematic analysis of the problem and the development of optimized B₀ shim strategies. Here we demonstrate the potential for simulating both overall and cardiac phase-specific B₀ field conditions in the human heart at 3 T at high spatial resolution from anatomical MRI. The results are validated by high-resolution B₀ field mapping in the same subjects. This approach is expected to develop population-specific B₀ shim strategies from readily available anatomical MRI libraries.

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