Temporal Tomographic Imaging by Greedy Feteke and Golden Means Sampling

David H. Johnson¹, Zhiyu Chen¹, Rizwan Ahmad¹, Alexandre Samouilov¹, Jay L. Zweier¹

A new sampling strategy is proposed and evaluated for tomographic imaging when temporal information is critical. Typical Electron Paramagnetic Resonance Imaging (EPRI) sampling strategies assume a static object and require a priori knowledge about its spatial distribution to produce reconstructions with few streak artifacts and accurate intensities. The new sampling strategy, Greedy Feteke (GF), was compared to a sampling strategy from the MRI projection acquisition literature, Golden Means (GM). A dynamic "washout" phantom was imaged by EPRI using both GF and GM, and GF was found to have superior temporal resolution to GM. The extension to 4D spectral-spatial EPRI is straightforward and compelling for GF sampling, and we anticipate a significant improvement in temporal cardiac EPRI.