Ultrafast Single Shot Imaging with Rotating Nonlinear Fields

Gigi Galiana¹, Robert Todd Constable¹

We present a novel approach whereby nonlinear gradient encoding can facilitate extremely fast imaging. We describe a trajectory that encodes the entire 2D image with a single rotation of a strong nonlinear field. Because this entails ramping through just one sine/cosine-shaped gradient pulse on each channel, the slew requirements of a single shot acquisition are minimal, and the acquisition can be compressed to a very short acquisition time without violating PNS limits. Our calculations show that the rotating gradient strategy could potentially allow us to acquire a full 20cm 64² image in as little as 2ms.