Ultra short echo time (UTE) techniques have been used to image cortical bone. However, imaging cortical bone in hip has been challenging due to limited signal-to-noise ratio (SNR), robust long T2 suppression, and long scan time. UTE sequences with TEs down to 32μs are able to acquire signal from both short and long T2* tissue. To suppress long T2* tissue, the combination of inversion recovery (IR) and UTE imaging can be used. In this report, we applied three-dimensional adiabatic inversion recovery prepared UTE with Cones trajectories (3D IR-UTE-Cones) to suppress long T2 tissue and to directly quantify cortical bone in the hip in vivo at 3T.
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