Fig. 5

a In a spiral MRSI, two time-varying readout gradients are administered in the data acquisition period with oscillating spiral trajectories. b Outlines the projection of a k-space trajectory along the k_f axis. The spiral trajectories originate from the (k_x, k_y) plane and repeatedly run a path through the k_x, k_y, k_f spaces with multiple and simultaneous spiral trajectories increasing volumetric acquisition around the k_f axis. Reproduced with permission from [39, 56]