Single-shot 2D spiral imaging of the human brain at 10.5 Tesla using 128 receive channels: initial experience

Motivation: There has been an increasing interest to pursue spiral imaging at ultrahigh field owing to its improved sampling efficiency. Goal(s): Our goal was to demonstrate the feasibility of spiral imaging in humans at 10.5 Tesla. Approach: Highly-accelerated single-shot 2D spiral GRE images were collected using 128 receive channels and a sequence developed in an open source environment. Dynamic field changes associated with the spiral readout gradients were measured in a separate session using 16 NMR probes. Results: Quality T2*-weighted single-shot spiral imaging of the human brain was achieved by simultaneous corrections of static off-resonances and dynamic field changes through image reconstruction. Impact: The demonstrated feasibility of spiral imaging in humans at 10.5 Tesla may shed light on how best to implement spiral imaging at ultrahigh field, paving the way for many applications that would benefit from a spiral readout.