Correction of Ferromagnetic Object Artifacts Using Simulated Off-Resonance Map
Sina Amirrajab1, Vahid Ghodrati2,3, and Abbas Nasiraei Moghaddam1
1Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran (Islamic Republic of), 2Department of Radiological Sciences, University of California, Los Angeles, Los Angeles, CA, United States, 3Biomedical Physics Interdepartmental Program, University of California, Los Angeles, Los Angeles, CA, United States
The aim of this study is to quantitatively investigate the potential of field-mapping method in areas around a ferromagnetic object in the post processing approach. As a worst-case scenario, for regions farther than around 10 times the radius of a ferromagnetic foreign object, the post processing approach (based on the simulated off-resonance map) can be useful, even at 3 Tesla, to correct image distortions. At this distance, the exact shape of the object is not important and results obtained for the sphere, remain valid for most objects with the same volume.
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