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Abstract #4821

Pseudo-fat in the fetal liver with two-point Dixon water-fat separation

Stephanie A Giza1, Barbra de Vrijer2,3, and Charles A McKenzie1,3

1Medical Biophysics, The University of Western Ontario, London, ON, Canada, 2Obstetrics and Gynaecology, The University of Western Ontario, London, ON, Canada, 3Division of Maternal, Fetal and Newborn Health, Children's Health Research Institute, London, ON, Canada

2-point Dixon water-fat imaging is a widely available sequence that can be used to generate fat images. Increased fat was seen in the livers of a 35+4 week anencephalic fetus and a 37 week normal fetus on 2-point Dixon images, but not with IDEAL water-fat imaging. When applied to the fetus late in gestation, caution should be taken as a shortened fetal liver T2* may appear as false liver fat. IDEAL water-fat imaging corrects for changes in T2* and is a more appropriate sequence for fetal water-fat separated imaging in the third trimester.

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