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Abstract #1125

Comparisons of Bone Density Measurements between Quantitative Computed Tomography & Magnetic Resonance IDEAL Imaging

Kai-Yu Ho1, Houchun Harry Hu1, Joyce H. Keyak2, Patrick M. Colletti1, Christopher M. Powers1

1University of Southern California, Los Angeles, CA, United States; 2University of California, Irvine, CA, United States

The purposes of this study are to 1) investigate the relationship between calcium hydroxyapatite (CHA) densities and MR signal intensities, and 2) to correlate the bone density measurements between quantitative computed tomography (QCT) and IDEAL. Our data has demonstrated a linear relationship between CHA density and MR signal intensity, providing the support on current model for estimating CHA equivalent density. With a CHA calibration marker, our study further demonstrated that IDEAL imaging can be used to quantify bone density: the CHA equivalent densities calculated on IDEAL in-phase imaging were significantly correlated with those quantified from QCT on a human patella.