Three-Dimensionally Accelerated Radial Parallel MRI with a 32-Channel Coil System

Olaf Dietrich¹, Maria Suttner¹, Maximilian F. Reiser¹

Established parallel-imaging techniques include the one-dimensional or two-dimensional acceleration of the data acquisition with Cartesian or non-Cartesian trajectories. However, state-of-the-art receiver coil arrays with 32 and more coil elements that are distributed approximately uniformly in space should also enable a three-dimensional parallel-imaging acceleration, i.e. simultaneous sparse sampling in all three k-space directions. The purpose of this study was to demonstrate three-dimensional parallel-imaging acceleration with high acceleration factors up to 32 based on a three-dimensional radial gradient-echo sequence.