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Abstract #2954

Reducing bias due to B0 inhomogeneity in abdominal T2* mapping

Pippa Storey1 and Dmitry S. Novikov1

1Radiology Department, New York University School of Medicine, New York, NY, United States

T2* measurements in the abdomen are often corrupted by macroscopic magnetic susceptibility effects from air in the lung and bowel. We show that sensitivity to linear B0 variations can be eliminated by tailoring the 2D slice profile appropriately and truncating the echo train where the phase difference between adjacent voxels within or across slices exceeds $$$\pi/2$$$. This improves T2* accuracy without the need for post hoc corrections. When compared with a conventional approach, the proposed technique demonstrates reduced sensitivity to B0 inhomogeneity in the liver caused by magnetic susceptibility differences in the lung.

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