Axel J. Krafft1, Ruitian Song1, Ralf B. Loeffler1, Matthew D. Robson2, Claudia M. Hillenbrand1
1Radiological Sciences, St. Jude Children's Research Hospital, Memphis, TN, United States; 2MRS Unit, Oxford University Centre for Clinical Magnetic Resonance Research, Oxford, United Kingdom
2D UTE imaging employs half pulse excitation and radial sampling to realize ultra-short echo times and allows for detection of very short T2* species. However, the half pulse slice profile is very sensitive to gradient imperfections and the imaging steady state so that accurate T2* measurements based on 2D UTE imaging remains challenging. Here, a recently presented concept using out-of-slice saturation to suppress unwanted background signals in 2D UTE imaging is extended with a technique for preservation of the imaging steady state. The sequence could be demonstrated as a simple and robust approach for improved 2D UTE slice selectivity.