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Abstract #0791

Bone Marrow Fat Fraction Mapping in the Proximal Femur in Vivo Using IDEAL Gradient Echo Imaging

Dimitrios C. Karampinos1, Huanzhou Yu2, Ann Shimakawa2, Eric T. Han2, Thomas M. Link1, Sharmila Majumdar1, Roland Krug1

1Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, CA, United States; 2Applied Science Laboratory, GE Healthcare, Menlo Park, CA, United States

There is some evidence that osteoporosis is associated with increased marrow fat content as well as an accelerated conversion from red marrow to yellow (fatty) marrow with age. In this work, we investigated the marrow fat composition in the proximal femur in vivo using IDEAL gradient echo imaging. 3-point IDEAL FGRE hip images of six healthy subjects were acquired and water-fat separation was performed using multi-peak IDEAL. The average fat fraction and standard deviation were determined in three different regions of interest (femoral head, greater trochanter and neck). Significant differences in marrow fat content were identified between the three regions for all subjects.