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Abstract #2405

Respiratory Self-Gating for Free-Breathing Quantitative Fat/Water Imaging in the Abdomen

Tianjing Zhang1, 2, Ning Jin, 13, Weiguo Li, 14, Xiaoming Yin1, Andrew C. Larson1, 2

1Radiology Department, Northwestern University, Chicago, IL, United States; 2Biomedical Engineering Department, Northwestern University, Evanston, IL, United States; 3Siemens Healthcare, Columbus, OH, United States; 4University of Illinois at Chicago, Chicago, IL, United States

This work introduces the combination of free-breathing technology with a fat/water separation method. A revised MGRE sequence was implemented to acquire imaging data during each volunteers free-breathing process, followed by an off-line image reconstruction. After that a global optimization algorithm was performed for fat/water separation. The results demonstrated that respiratory self-gated multiple gradient recalled echo sequence with the variable projection fat/water separation method is efficient in reducing the motion artifacts in abdominal imaging. In that way there are no restrictions for slice coverage, spatial resolution as well as scan time in the abdominal fat/water separation applications.

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Keywords

abdomen abdominal acquisition allowing applications applying approaches artifacts averaging avoid band biomedical blood blurring breath breathing carried clinical combines commonly comparable confidence consideration constraints contained coverage depending deterioration determine drawn duration effectively eliminate employed engineering excluding feasibility field fraction free future gating generated global gradient hold holding implemented imposed inaccurate included individual lead length limitations limited liver magnitude maps materials matrix measured mitigated motion northwestern noticeable optimization overall pixel pixels position processing produced qualitatively quality quantitative quantitatively radiology rank rather reconstruction reeder representative requisite resolution respiration respiratory revised ringing sampled scanner sedated self separation settings signed significance significantly slice smoothness space spatial stands statistically subjects successfully superior technology train valuable vessels view volunteer volunteers water wherein width