Abstract #0504

A B1-insensitive High Resolution 2D T1 Mapping Pulse Sequence for Radial dGEMRIC of the Hip at 3T

Riccardo Lattanzi^1,2, Christian Glaser^1,2, Artem V. Mikheev², Catherine Petchprapa², David J. Mossa², Soterios Gyftopoulos², Henry Rusinek², Michael Recht², Daniel Kim^1,2

¹Center for Biomedical Imaging, New York University Langone Medical Center, New York, NY, USA; ²Radiology, New York University Langone Medical Center, New York, NY, USA

Early detection of cartilage degeneration in the hip with dGEMRIC may help prevent osteoarthritis in patients with femoroacetabular impingement. We propose a new high-resolution 2D T₁-mapping saturation-recovery (SR) pulse sequence with FSE readout for dGEMRIC at 3T in radial imaging planes. Our sequence was validated in a phantom and in 10 hips against a rigorous multi-point SR pulse sequence. T₁ measurements by the two sequences were strongly correlated (R² > 0.95) and in excellent agreement (mean difference = -8.7ms; 95% limits of agreement = 64.5 and -81.9ms, respectively). T₁ measurements were insensitive to B₁⁺ variation as large as 20%.