An Electrostatic Charge Repulsion Algorithm for Dynamic Ordering of 3D Projections

Gregory R. Lee¹, ², Mark A. Griswold¹, ²

In dynamic imaging applications it is desirable to order the projections of a 3D radial acquisition so that they are approximately equally distributed over k-space at any time scale. The authors propose a numerical algorithm based on electrostatic charge repulsion with modifications to encourage uniform sample spacing at various time scales. In comparison to an existing 3D golden angle approach, the proposed method results in improved sampling uniformity over the full set of projections. While the golden angle approach is only compatible with linear projections, the proposed technique also applies when multiple radial projections are acquired in a single shot.