Accelerated 3D free-breathing cardiac T2 mapping with tiny golden-angle hybrid trajectory and tyGRASP

Cardiac diseases are characterized by complex 3D pathological structures, 3D cardiac T2 mapping can be used as a promising tool to describe different pathologies. However, 3D T2 mapping requires a long acquisition time, which makes scanning more sensitive to motion, especially for high spatial resolution imaging. In our study, we aim to develop an accelerated and robust 3D cardiac T2 mapping technique by combining bSSFP-based hybrid radial-cartesian sampling with tiny Golden angle RAdial Sparse Parallel (tyGRASP) MRI at 3 T. The results showed that our method can generate precise T2 values with an average scan time of 6.1±1.0 min.