Abstract #4313

Flow-induced artifacts in two-point Dixon MRI: Incidence, severity and potential diagnostic pitfalls.

Tilman Schubert¹, Peter Bannas², Samir Sharma³, Sonja Kinner¹, Mahdi Rahimi³, Frank Korosec³, and Scott Reeder¹

¹Radiology, University of Wisconsin Madison, Madison, WI, United States, ²Radiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany, ³Medical Physics, University of Wisconsin Madison, Madison, WI, United States

Chemical shift based two-point “Dixon” MRI with bipolar readout gradients may produce flow induced fat-water misallocation artifacts. These artifacts have the potential to mimic intravascular thrombus. We reviewed 100 cases of two-point body MRI exams to characterize the incidence, location and severity of these artifacts. Artifacts appeared in 46% of the cases, with severe artifacts in 20% and mild artifacts in 26% of the patients. Given this high number of potentially thrombus-mimicking, flow-induced artifacts, radiologists should be aware of this potential pitfall when using two-point fat-water separation methods.

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